./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.03.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4996a252ab084c920e1b9a19c3119ce328d4cb97d6d45029062c9dac50449e19 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 15:08:25,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:08:25,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:08:25,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:08:25,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:08:25,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:08:25,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:08:25,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:08:25,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:08:25,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:08:25,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:08:25,204 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:08:25,205 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:08:25,206 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:08:25,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:08:25,209 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:08:25,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:08:25,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:08:25,214 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:08:25,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:08:25,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:08:25,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:08:25,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:08:25,223 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:08:25,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:08:25,228 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:08:25,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:08:25,230 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:08:25,230 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:08:25,232 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:08:25,233 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:08:25,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:08:25,235 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:08:25,236 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:08:25,238 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:08:25,238 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:08:25,239 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:08:25,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:08:25,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:08:25,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:08:25,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:08:25,244 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:08:25,270 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:08:25,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:08:25,271 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:08:25,272 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:08:25,272 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:08:25,273 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:08:25,273 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:08:25,274 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:08:25,274 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:08:25,274 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:08:25,275 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:08:25,275 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:08:25,275 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:08:25,276 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:08:25,276 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:08:25,276 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:08:25,277 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:08:25,277 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:08:25,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:08:25,278 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:08:25,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:08:25,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:08:25,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:08:25,280 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:08:25,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:08:25,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:08:25,281 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:08:25,281 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:08:25,281 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:08:25,282 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:08:25,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:08:25,283 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:08:25,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:08:25,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:08:25,284 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:08:25,284 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:08:25,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:08:25,285 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:08:25,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:08:25,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:08:25,286 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:08:25,286 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_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4996a252ab084c920e1b9a19c3119ce328d4cb97d6d45029062c9dac50449e19 [2022-11-23 15:08:25,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:08:25,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:08:25,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:08:25,656 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:08:25,656 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:08:25,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/systemc/token_ring.03.cil-2.c [2022-11-23 15:08:29,221 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:08:29,504 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:08:29,506 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/sv-benchmarks/c/systemc/token_ring.03.cil-2.c [2022-11-23 15:08:29,521 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/data/275d11bf9/0f9f1e040f9445dabd4b220e81c1c02a/FLAGc7cc56fa3 [2022-11-23 15:08:29,551 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/data/275d11bf9/0f9f1e040f9445dabd4b220e81c1c02a [2022-11-23 15:08:29,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:08:29,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:08:29,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:08:29,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:08:29,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:08:29,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:08:29" (1/1) ... [2022-11-23 15:08:29,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f043c62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:29, skipping insertion in model container [2022-11-23 15:08:29,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:08:29" (1/1) ... [2022-11-23 15:08:29,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:08:29,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:08:29,809 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/sv-benchmarks/c/systemc/token_ring.03.cil-2.c[671,684] [2022-11-23 15:08:29,887 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:08:29,900 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:08:29,914 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/sv-benchmarks/c/systemc/token_ring.03.cil-2.c[671,684] [2022-11-23 15:08:29,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:08:29,972 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:08:29,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:29 WrapperNode [2022-11-23 15:08:29,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:08:29,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:08:29,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:08:29,975 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:08:29,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:29" (1/1) ... [2022-11-23 15:08:29,994 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:29" (1/1) ... [2022-11-23 15:08:30,030 INFO L138 Inliner]: procedures = 34, calls = 40, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 331 [2022-11-23 15:08:30,031 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:08:30,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:08:30,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:08:30,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:08:30,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:29" (1/1) ... [2022-11-23 15:08:30,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:29" (1/1) ... [2022-11-23 15:08:30,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:29" (1/1) ... [2022-11-23 15:08:30,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:29" (1/1) ... [2022-11-23 15:08:30,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:29" (1/1) ... [2022-11-23 15:08:30,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:29" (1/1) ... [2022-11-23 15:08:30,070 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:29" (1/1) ... [2022-11-23 15:08:30,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:29" (1/1) ... [2022-11-23 15:08:30,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:08:30,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:08:30,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:08:30,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:08:30,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:29" (1/1) ... [2022-11-23 15:08:30,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:08:30,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:30,118 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:08:30,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:08:30,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:08:30,173 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-23 15:08:30,173 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-23 15:08:30,173 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-23 15:08:30,174 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-23 15:08:30,174 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-23 15:08:30,174 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-23 15:08:30,174 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-23 15:08:30,175 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-23 15:08:30,175 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-23 15:08:30,175 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-23 15:08:30,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:08:30,176 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-23 15:08:30,176 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-23 15:08:30,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:08:30,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:08:30,281 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:08:30,284 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:08:31,001 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:08:31,187 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:08:31,187 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-23 15:08:31,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:08:31 BoogieIcfgContainer [2022-11-23 15:08:31,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:08:31,193 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:08:31,193 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:08:31,197 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:08:31,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:08:29" (1/3) ... [2022-11-23 15:08:31,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65278176 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:08:31, skipping insertion in model container [2022-11-23 15:08:31,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:29" (2/3) ... [2022-11-23 15:08:31,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65278176 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:08:31, skipping insertion in model container [2022-11-23 15:08:31,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:08:31" (3/3) ... [2022-11-23 15:08:31,201 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.03.cil-2.c [2022-11-23 15:08:31,225 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:08:31,225 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:08:31,305 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:08:31,316 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;@5a0c2059, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:08:31,317 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:08:31,322 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 64 states have (on average 1.5) internal successors, (96), 66 states have internal predecessors, (96), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-23 15:08:31,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-23 15:08:31,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:31,333 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] [2022-11-23 15:08:31,334 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:31,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:31,340 INFO L85 PathProgramCache]: Analyzing trace with hash 988164258, now seen corresponding path program 1 times [2022-11-23 15:08:31,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:31,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48864276] [2022-11-23 15:08:31,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:31,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:31,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:08:31,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:31,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48864276] [2022-11-23 15:08:31,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48864276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:31,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:08:31,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:08:31,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565916112] [2022-11-23 15:08:31,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:31,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:08:31,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:31,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:08:31,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:08:31,934 INFO L87 Difference]: Start difference. First operand has 89 states, 64 states have (on average 1.5) internal successors, (96), 66 states have internal predecessors, (96), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 15:08:32,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:32,429 INFO L93 Difference]: Finished difference Result 251 states and 373 transitions. [2022-11-23 15:08:32,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:08:32,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-11-23 15:08:32,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:32,451 INFO L225 Difference]: With dead ends: 251 [2022-11-23 15:08:32,451 INFO L226 Difference]: Without dead ends: 163 [2022-11-23 15:08:32,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:08:32,464 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 215 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:32,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 306 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:08:32,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-23 15:08:32,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2022-11-23 15:08:32,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 119 states have (on average 1.411764705882353) internal successors, (168), 121 states have internal predecessors, (168), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-23 15:08:32,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 228 transitions. [2022-11-23 15:08:32,538 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 228 transitions. Word has length 39 [2022-11-23 15:08:32,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:32,539 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 228 transitions. [2022-11-23 15:08:32,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 15:08:32,540 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 228 transitions. [2022-11-23 15:08:32,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-23 15:08:32,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:32,545 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:08:32,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:08:32,546 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:32,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:32,547 INFO L85 PathProgramCache]: Analyzing trace with hash 39532403, now seen corresponding path program 1 times [2022-11-23 15:08:32,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:32,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415712869] [2022-11-23 15:08:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:32,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 15:08:32,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:32,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415712869] [2022-11-23 15:08:32,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415712869] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:08:32,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477025281] [2022-11-23 15:08:32,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:32,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:32,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:32,747 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:08:32,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:08:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:32,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:08:32,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 15:08:33,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:08:33,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477025281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:33,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:08:33,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-23 15:08:33,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690284392] [2022-11-23 15:08:33,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:33,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:08:33,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:33,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:08:33,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:08:33,051 INFO L87 Difference]: Start difference. First operand 162 states and 228 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:08:33,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:33,219 INFO L93 Difference]: Finished difference Result 469 states and 669 transitions. [2022-11-23 15:08:33,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:08:33,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2022-11-23 15:08:33,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:33,234 INFO L225 Difference]: With dead ends: 469 [2022-11-23 15:08:33,234 INFO L226 Difference]: Without dead ends: 312 [2022-11-23 15:08:33,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:08:33,245 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 100 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:33,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 226 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:08:33,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-11-23 15:08:33,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 308. [2022-11-23 15:08:33,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 229 states have (on average 1.4017467248908297) internal successors, (321), 232 states have internal predecessors, (321), 54 states have call successors, (54), 24 states have call predecessors, (54), 24 states have return successors, (54), 52 states have call predecessors, (54), 54 states have call successors, (54) [2022-11-23 15:08:33,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 429 transitions. [2022-11-23 15:08:33,297 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 429 transitions. Word has length 72 [2022-11-23 15:08:33,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:33,297 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 429 transitions. [2022-11-23 15:08:33,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:08:33,298 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 429 transitions. [2022-11-23 15:08:33,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-23 15:08:33,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:33,306 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:08:33,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:08:33,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:33,514 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:33,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:33,514 INFO L85 PathProgramCache]: Analyzing trace with hash 686067441, now seen corresponding path program 1 times [2022-11-23 15:08:33,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:33,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406768626] [2022-11-23 15:08:33,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:33,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:33,686 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 15:08:33,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:33,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406768626] [2022-11-23 15:08:33,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406768626] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:08:33,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876314647] [2022-11-23 15:08:33,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:33,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:33,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:33,690 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:08:33,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:08:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:33,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:08:33,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:08:33,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:08:33,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876314647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:33,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:08:33,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 15:08:33,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611667929] [2022-11-23 15:08:33,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:33,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:08:33,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:33,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:08:33,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:08:33,905 INFO L87 Difference]: Start difference. First operand 308 states and 429 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:08:34,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:34,049 INFO L93 Difference]: Finished difference Result 901 states and 1272 transitions. [2022-11-23 15:08:34,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:08:34,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2022-11-23 15:08:34,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:34,055 INFO L225 Difference]: With dead ends: 901 [2022-11-23 15:08:34,055 INFO L226 Difference]: Without dead ends: 598 [2022-11-23 15:08:34,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:08:34,058 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 97 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:34,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 225 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:08:34,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-11-23 15:08:34,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 592. [2022-11-23 15:08:34,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 443 states have (on average 1.3882618510158014) internal successors, (615), 448 states have internal predecessors, (615), 100 states have call successors, (100), 48 states have call predecessors, (100), 48 states have return successors, (100), 96 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-23 15:08:34,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 815 transitions. [2022-11-23 15:08:34,161 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 815 transitions. Word has length 72 [2022-11-23 15:08:34,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:34,161 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 815 transitions. [2022-11-23 15:08:34,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:08:34,162 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 815 transitions. [2022-11-23 15:08:34,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-23 15:08:34,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:34,167 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:08:34,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:08:34,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:34,384 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:34,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:34,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1192269875, now seen corresponding path program 1 times [2022-11-23 15:08:34,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:34,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124592853] [2022-11-23 15:08:34,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:34,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:08:34,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:34,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124592853] [2022-11-23 15:08:34,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124592853] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:34,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:08:34,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:08:34,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648777911] [2022-11-23 15:08:34,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:34,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:08:34,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:34,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:08:34,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:08:34,857 INFO L87 Difference]: Start difference. First operand 592 states and 815 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 15:08:35,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:35,470 INFO L93 Difference]: Finished difference Result 1876 states and 2586 transitions. [2022-11-23 15:08:35,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:08:35,471 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 72 [2022-11-23 15:08:35,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:35,494 INFO L225 Difference]: With dead ends: 1876 [2022-11-23 15:08:35,494 INFO L226 Difference]: Without dead ends: 1290 [2022-11-23 15:08:35,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:08:35,500 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 326 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:35,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 340 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:08:35,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2022-11-23 15:08:35,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1128. [2022-11-23 15:08:35,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 843 states have (on average 1.3701067615658362) internal successors, (1155), 852 states have internal predecessors, (1155), 188 states have call successors, (188), 96 states have call predecessors, (188), 96 states have return successors, (188), 180 states have call predecessors, (188), 188 states have call successors, (188) [2022-11-23 15:08:35,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1531 transitions. [2022-11-23 15:08:35,682 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1531 transitions. Word has length 72 [2022-11-23 15:08:35,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:35,687 INFO L495 AbstractCegarLoop]: Abstraction has 1128 states and 1531 transitions. [2022-11-23 15:08:35,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 15:08:35,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1531 transitions. [2022-11-23 15:08:35,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 15:08:35,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:35,697 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:08:35,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:08:35,698 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:35,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:35,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1395425187, now seen corresponding path program 1 times [2022-11-23 15:08:35,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:35,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214688863] [2022-11-23 15:08:35,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:35,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:36,108 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:08:36,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:36,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214688863] [2022-11-23 15:08:36,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214688863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:36,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:08:36,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:08:36,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878529161] [2022-11-23 15:08:36,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:36,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:08:36,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:36,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:08:36,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:08:36,114 INFO L87 Difference]: Start difference. First operand 1128 states and 1531 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 15:08:36,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:36,648 INFO L93 Difference]: Finished difference Result 2884 states and 3933 transitions. [2022-11-23 15:08:36,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:08:36,649 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 73 [2022-11-23 15:08:36,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:36,661 INFO L225 Difference]: With dead ends: 2884 [2022-11-23 15:08:36,661 INFO L226 Difference]: Without dead ends: 1762 [2022-11-23 15:08:36,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:08:36,667 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 297 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:36,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 328 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:08:36,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2022-11-23 15:08:36,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 1656. [2022-11-23 15:08:36,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1235 states have (on average 1.3562753036437247) internal successors, (1675), 1248 states have internal predecessors, (1675), 276 states have call successors, (276), 144 states have call predecessors, (276), 144 states have return successors, (276), 264 states have call predecessors, (276), 276 states have call successors, (276) [2022-11-23 15:08:36,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 2227 transitions. [2022-11-23 15:08:36,907 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 2227 transitions. Word has length 73 [2022-11-23 15:08:36,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:36,909 INFO L495 AbstractCegarLoop]: Abstraction has 1656 states and 2227 transitions. [2022-11-23 15:08:36,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 15:08:36,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 2227 transitions. [2022-11-23 15:08:36,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-23 15:08:36,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:36,917 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:08:36,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:08:36,918 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:36,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:36,918 INFO L85 PathProgramCache]: Analyzing trace with hash 362479671, now seen corresponding path program 1 times [2022-11-23 15:08:36,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:36,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250284220] [2022-11-23 15:08:36,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:36,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:36,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:37,007 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:08:37,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:37,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250284220] [2022-11-23 15:08:37,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250284220] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:37,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:08:37,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:08:37,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536273925] [2022-11-23 15:08:37,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:37,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:08:37,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:37,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:08:37,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:08:37,011 INFO L87 Difference]: Start difference. First operand 1656 states and 2227 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 15:08:37,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:37,337 INFO L93 Difference]: Finished difference Result 2914 states and 3962 transitions. [2022-11-23 15:08:37,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:08:37,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 74 [2022-11-23 15:08:37,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:37,350 INFO L225 Difference]: With dead ends: 2914 [2022-11-23 15:08:37,350 INFO L226 Difference]: Without dead ends: 2064 [2022-11-23 15:08:37,353 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 [2022-11-23 15:08:37,354 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 45 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:37,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 255 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:08:37,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2022-11-23 15:08:37,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1870. [2022-11-23 15:08:37,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1425 states have (on average 1.3803508771929824) internal successors, (1967), 1438 states have internal predecessors, (1967), 288 states have call successors, (288), 156 states have call predecessors, (288), 156 states have return successors, (288), 276 states have call predecessors, (288), 288 states have call successors, (288) [2022-11-23 15:08:37,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2543 transitions. [2022-11-23 15:08:37,598 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2543 transitions. Word has length 74 [2022-11-23 15:08:37,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:37,598 INFO L495 AbstractCegarLoop]: Abstraction has 1870 states and 2543 transitions. [2022-11-23 15:08:37,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 15:08:37,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2543 transitions. [2022-11-23 15:08:37,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-23 15:08:37,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:37,606 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:08:37,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:08:37,606 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:37,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:37,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1643608469, now seen corresponding path program 1 times [2022-11-23 15:08:37,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:37,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903009282] [2022-11-23 15:08:37,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:37,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:37,760 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 15:08:37,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:37,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903009282] [2022-11-23 15:08:37,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903009282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:37,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:08:37,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:08:37,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480893282] [2022-11-23 15:08:37,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:37,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:08:37,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:37,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:08:37,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:08:37,763 INFO L87 Difference]: Start difference. First operand 1870 states and 2543 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 15:08:38,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:38,110 INFO L93 Difference]: Finished difference Result 4662 states and 6380 transitions. [2022-11-23 15:08:38,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:08:38,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 96 [2022-11-23 15:08:38,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:38,164 INFO L225 Difference]: With dead ends: 4662 [2022-11-23 15:08:38,164 INFO L226 Difference]: Without dead ends: 2797 [2022-11-23 15:08:38,173 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 [2022-11-23 15:08:38,175 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 93 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:38,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 226 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:08:38,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2022-11-23 15:08:38,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 2777. [2022-11-23 15:08:38,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2777 states, 2118 states have (on average 1.3640226628895185) internal successors, (2889), 2137 states have internal predecessors, (2889), 424 states have call successors, (424), 234 states have call predecessors, (424), 234 states have return successors, (424), 406 states have call predecessors, (424), 424 states have call successors, (424) [2022-11-23 15:08:38,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2777 states to 2777 states and 3737 transitions. [2022-11-23 15:08:38,501 INFO L78 Accepts]: Start accepts. Automaton has 2777 states and 3737 transitions. Word has length 96 [2022-11-23 15:08:38,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:38,502 INFO L495 AbstractCegarLoop]: Abstraction has 2777 states and 3737 transitions. [2022-11-23 15:08:38,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 15:08:38,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2777 states and 3737 transitions. [2022-11-23 15:08:38,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-23 15:08:38,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:38,515 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:08:38,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:08:38,516 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:38,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:38,517 INFO L85 PathProgramCache]: Analyzing trace with hash -779664507, now seen corresponding path program 1 times [2022-11-23 15:08:38,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:38,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494041681] [2022-11-23 15:08:38,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:38,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-23 15:08:38,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:38,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494041681] [2022-11-23 15:08:38,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494041681] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:08:38,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618171692] [2022-11-23 15:08:38,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:38,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:38,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:38,708 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:08:38,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:08:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:38,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:08:38,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 15:08:38,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:08:38,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618171692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:38,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:08:38,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 15:08:38,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227689849] [2022-11-23 15:08:38,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:38,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:08:38,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:38,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:08:38,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:08:38,940 INFO L87 Difference]: Start difference. First operand 2777 states and 3737 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 15:08:39,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:39,250 INFO L93 Difference]: Finished difference Result 5252 states and 7137 transitions. [2022-11-23 15:08:39,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:08:39,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2022-11-23 15:08:39,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:39,273 INFO L225 Difference]: With dead ends: 5252 [2022-11-23 15:08:39,274 INFO L226 Difference]: Without dead ends: 3400 [2022-11-23 15:08:39,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:08:39,282 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 60 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:39,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 266 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:08:39,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2022-11-23 15:08:39,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3068. [2022-11-23 15:08:39,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3068 states, 2373 states have (on average 1.381795195954488) internal successors, (3279), 2392 states have internal predecessors, (3279), 442 states have call successors, (442), 252 states have call predecessors, (442), 252 states have return successors, (442), 424 states have call predecessors, (442), 442 states have call successors, (442) [2022-11-23 15:08:39,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3068 states to 3068 states and 4163 transitions. [2022-11-23 15:08:39,598 INFO L78 Accepts]: Start accepts. Automaton has 3068 states and 4163 transitions. Word has length 111 [2022-11-23 15:08:39,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:39,598 INFO L495 AbstractCegarLoop]: Abstraction has 3068 states and 4163 transitions. [2022-11-23 15:08:39,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 15:08:39,599 INFO L276 IsEmpty]: Start isEmpty. Operand 3068 states and 4163 transitions. [2022-11-23 15:08:39,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-23 15:08:39,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:39,610 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:08:39,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:08:39,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:39,817 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:39,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:39,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1152981882, now seen corresponding path program 2 times [2022-11-23 15:08:39,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:39,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331729831] [2022-11-23 15:08:39,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:39,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 15:08:40,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:40,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331729831] [2022-11-23 15:08:40,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331729831] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:08:40,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104234811] [2022-11-23 15:08:40,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:08:40,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:40,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:40,104 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:08:40,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:08:40,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 15:08:40,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:08:40,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-23 15:08:40,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-23 15:08:40,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:08:41,363 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-23 15:08:41,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104234811] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 15:08:41,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:08:41,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2022-11-23 15:08:41,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476967775] [2022-11-23 15:08:41,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:41,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:08:41,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:41,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:08:41,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:08:41,372 INFO L87 Difference]: Start difference. First operand 3068 states and 4163 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-23 15:08:42,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:42,212 INFO L93 Difference]: Finished difference Result 7527 states and 10177 transitions. [2022-11-23 15:08:42,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:08:42,213 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 111 [2022-11-23 15:08:42,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:42,235 INFO L225 Difference]: With dead ends: 7527 [2022-11-23 15:08:42,235 INFO L226 Difference]: Without dead ends: 4465 [2022-11-23 15:08:42,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:08:42,243 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 316 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:42,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 241 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:08:42,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4465 states. [2022-11-23 15:08:42,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4465 to 4463. [2022-11-23 15:08:42,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 3432 states have (on average 1.354020979020979) internal successors, (4647), 3460 states have internal predecessors, (4647), 652 states have call successors, (652), 378 states have call predecessors, (652), 378 states have return successors, (652), 625 states have call predecessors, (652), 652 states have call successors, (652) [2022-11-23 15:08:42,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 5951 transitions. [2022-11-23 15:08:42,717 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 5951 transitions. Word has length 111 [2022-11-23 15:08:42,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:42,717 INFO L495 AbstractCegarLoop]: Abstraction has 4463 states and 5951 transitions. [2022-11-23 15:08:42,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-23 15:08:42,718 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 5951 transitions. [2022-11-23 15:08:42,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 15:08:42,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:42,733 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:08:42,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:08:42,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-23 15:08:42,942 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:42,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:42,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1341230879, now seen corresponding path program 1 times [2022-11-23 15:08:42,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:42,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495611628] [2022-11-23 15:08:42,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:42,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-23 15:08:43,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:43,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495611628] [2022-11-23 15:08:43,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495611628] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:08:43,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128098741] [2022-11-23 15:08:43,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:43,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:43,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:43,080 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:08:43,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:08:43,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:43,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:08:43,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 15:08:43,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:08:43,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128098741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:43,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:08:43,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 15:08:43,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540045070] [2022-11-23 15:08:43,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:43,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:08:43,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:43,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:08:43,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:08:43,292 INFO L87 Difference]: Start difference. First operand 4463 states and 5951 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 15:08:43,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:43,831 INFO L93 Difference]: Finished difference Result 8514 states and 11449 transitions. [2022-11-23 15:08:43,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:08:43,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 113 [2022-11-23 15:08:43,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:43,863 INFO L225 Difference]: With dead ends: 8514 [2022-11-23 15:08:43,863 INFO L226 Difference]: Without dead ends: 5542 [2022-11-23 15:08:43,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:08:43,874 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 65 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:43,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 271 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:08:43,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5542 states. [2022-11-23 15:08:44,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5542 to 4982. [2022-11-23 15:08:44,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4982 states, 3879 states have (on average 1.3642691415313226) internal successors, (5292), 3907 states have internal predecessors, (5292), 688 states have call successors, (688), 414 states have call predecessors, (688), 414 states have return successors, (688), 661 states have call predecessors, (688), 688 states have call successors, (688) [2022-11-23 15:08:44,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4982 states to 4982 states and 6668 transitions. [2022-11-23 15:08:44,597 INFO L78 Accepts]: Start accepts. Automaton has 4982 states and 6668 transitions. Word has length 113 [2022-11-23 15:08:44,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:44,598 INFO L495 AbstractCegarLoop]: Abstraction has 4982 states and 6668 transitions. [2022-11-23 15:08:44,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 15:08:44,598 INFO L276 IsEmpty]: Start isEmpty. Operand 4982 states and 6668 transitions. [2022-11-23 15:08:44,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 15:08:44,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:44,614 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:08:44,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-23 15:08:44,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 15:08:44,828 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:44,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:44,829 INFO L85 PathProgramCache]: Analyzing trace with hash 468430558, now seen corresponding path program 2 times [2022-11-23 15:08:44,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:44,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452559555] [2022-11-23 15:08:44,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:44,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 15:08:45,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:45,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452559555] [2022-11-23 15:08:45,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452559555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:08:45,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414199835] [2022-11-23 15:08:45,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:08:45,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:45,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:45,143 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:08:45,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:08:45,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 15:08:45,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:08:45,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 15:08:45,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:45,726 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 23 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 15:08:45,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:08:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-23 15:08:46,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414199835] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 15:08:46,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:08:46,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 7] total 14 [2022-11-23 15:08:46,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318933628] [2022-11-23 15:08:46,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:46,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:08:46,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:46,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:08:46,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-23 15:08:46,096 INFO L87 Difference]: Start difference. First operand 4982 states and 6668 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 15:08:46,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:46,917 INFO L93 Difference]: Finished difference Result 9913 states and 13398 transitions. [2022-11-23 15:08:46,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:08:46,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 113 [2022-11-23 15:08:46,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:46,986 INFO L225 Difference]: With dead ends: 9913 [2022-11-23 15:08:46,986 INFO L226 Difference]: Without dead ends: 6422 [2022-11-23 15:08:46,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-23 15:08:46,998 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 111 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:46,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 271 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:08:47,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6422 states. [2022-11-23 15:08:47,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6422 to 6230. [2022-11-23 15:08:47,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6230 states, 5019 states have (on average 1.3460848774656307) internal successors, (6756), 5047 states have internal predecessors, (6756), 706 states have call successors, (706), 504 states have call predecessors, (706), 504 states have return successors, (754), 679 states have call predecessors, (754), 706 states have call successors, (754) [2022-11-23 15:08:47,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6230 states to 6230 states and 8216 transitions. [2022-11-23 15:08:47,716 INFO L78 Accepts]: Start accepts. Automaton has 6230 states and 8216 transitions. Word has length 113 [2022-11-23 15:08:47,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:47,717 INFO L495 AbstractCegarLoop]: Abstraction has 6230 states and 8216 transitions. [2022-11-23 15:08:47,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 15:08:47,717 INFO L276 IsEmpty]: Start isEmpty. Operand 6230 states and 8216 transitions. [2022-11-23 15:08:47,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 15:08:47,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:47,734 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:08:47,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:08:47,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:47,944 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:47,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:47,944 INFO L85 PathProgramCache]: Analyzing trace with hash -763677826, now seen corresponding path program 1 times [2022-11-23 15:08:47,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:47,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776450079] [2022-11-23 15:08:47,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:47,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 15:08:48,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:48,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776450079] [2022-11-23 15:08:48,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776450079] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:08:48,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620062090] [2022-11-23 15:08:48,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:48,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:48,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:48,223 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:08:48,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:08:48,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:48,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:08:48,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:08:48,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:08:48,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620062090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:48,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:08:48,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 15:08:48,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558086548] [2022-11-23 15:08:48,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:48,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:08:48,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:48,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:08:48,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:08:48,453 INFO L87 Difference]: Start difference. First operand 6230 states and 8216 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 15:08:49,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:49,319 INFO L93 Difference]: Finished difference Result 10440 states and 14070 transitions. [2022-11-23 15:08:49,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:08:49,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 113 [2022-11-23 15:08:49,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:49,354 INFO L225 Difference]: With dead ends: 10440 [2022-11-23 15:08:49,355 INFO L226 Difference]: Without dead ends: 6250 [2022-11-23 15:08:49,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:08:49,371 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 88 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:49,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 262 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:08:49,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6250 states. [2022-11-23 15:08:50,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6250 to 6170. [2022-11-23 15:08:50,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6170 states, 4959 states have (on average 1.3139745916515426) internal successors, (6516), 4987 states have internal predecessors, (6516), 706 states have call successors, (706), 504 states have call predecessors, (706), 504 states have return successors, (754), 679 states have call predecessors, (754), 706 states have call successors, (754) [2022-11-23 15:08:50,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6170 states to 6170 states and 7976 transitions. [2022-11-23 15:08:50,143 INFO L78 Accepts]: Start accepts. Automaton has 6170 states and 7976 transitions. Word has length 113 [2022-11-23 15:08:50,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:50,144 INFO L495 AbstractCegarLoop]: Abstraction has 6170 states and 7976 transitions. [2022-11-23 15:08:50,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 15:08:50,145 INFO L276 IsEmpty]: Start isEmpty. Operand 6170 states and 7976 transitions. [2022-11-23 15:08:50,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 15:08:50,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:50,161 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:08:50,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:08:50,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:50,369 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:50,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:50,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1128683810, now seen corresponding path program 1 times [2022-11-23 15:08:50,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:50,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429701045] [2022-11-23 15:08:50,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:50,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 15:08:50,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:50,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429701045] [2022-11-23 15:08:50,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429701045] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:08:50,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883441798] [2022-11-23 15:08:50,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:50,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:50,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:50,632 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:08:50,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:08:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:50,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:08:50,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:50,838 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 15:08:50,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:08:50,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883441798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:50,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:08:50,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 15:08:50,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819174655] [2022-11-23 15:08:50,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:50,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:08:50,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:50,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:08:50,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:08:50,841 INFO L87 Difference]: Start difference. First operand 6170 states and 7976 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 15:08:51,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:51,585 INFO L93 Difference]: Finished difference Result 11251 states and 14618 transitions. [2022-11-23 15:08:51,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:08:51,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 113 [2022-11-23 15:08:51,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:51,609 INFO L225 Difference]: With dead ends: 11251 [2022-11-23 15:08:51,609 INFO L226 Difference]: Without dead ends: 7151 [2022-11-23 15:08:51,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:08:51,620 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 99 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:51,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 135 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:08:51,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2022-11-23 15:08:52,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 7151. [2022-11-23 15:08:52,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7151 states, 5826 states have (on average 1.2868177136972194) internal successors, (7497), 5854 states have internal predecessors, (7497), 736 states have call successors, (736), 588 states have call predecessors, (736), 588 states have return successors, (784), 709 states have call predecessors, (784), 736 states have call successors, (784) [2022-11-23 15:08:52,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7151 states to 7151 states and 9017 transitions. [2022-11-23 15:08:52,495 INFO L78 Accepts]: Start accepts. Automaton has 7151 states and 9017 transitions. Word has length 113 [2022-11-23 15:08:52,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:52,496 INFO L495 AbstractCegarLoop]: Abstraction has 7151 states and 9017 transitions. [2022-11-23 15:08:52,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 15:08:52,496 INFO L276 IsEmpty]: Start isEmpty. Operand 7151 states and 9017 transitions. [2022-11-23 15:08:52,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-23 15:08:52,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:52,513 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:08:52,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 15:08:52,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 15:08:52,721 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:52,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:52,722 INFO L85 PathProgramCache]: Analyzing trace with hash -918604943, now seen corresponding path program 1 times [2022-11-23 15:08:52,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:52,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937777183] [2022-11-23 15:08:52,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:52,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:52,985 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 15:08:52,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:52,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937777183] [2022-11-23 15:08:52,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937777183] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:08:52,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187919497] [2022-11-23 15:08:52,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:52,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:52,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:52,988 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:08:53,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 15:08:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:53,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:08:53,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 15:08:53,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:08:53,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187919497] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:53,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:08:53,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 15:08:53,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403203699] [2022-11-23 15:08:53,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:53,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:08:53,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:53,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:08:53,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:08:53,227 INFO L87 Difference]: Start difference. First operand 7151 states and 9017 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 15:08:54,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:54,102 INFO L93 Difference]: Finished difference Result 12068 states and 15528 transitions. [2022-11-23 15:08:54,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:08:54,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 114 [2022-11-23 15:08:54,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:54,132 INFO L225 Difference]: With dead ends: 12068 [2022-11-23 15:08:54,132 INFO L226 Difference]: Without dead ends: 7099 [2022-11-23 15:08:54,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:08:54,146 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 87 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:54,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 274 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:08:54,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7099 states. [2022-11-23 15:08:55,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7099 to 7043. [2022-11-23 15:08:55,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7043 states, 5730 states have (on average 1.2581151832460733) internal successors, (7209), 5746 states have internal predecessors, (7209), 736 states have call successors, (736), 588 states have call predecessors, (736), 576 states have return successors, (772), 709 states have call predecessors, (772), 736 states have call successors, (772) [2022-11-23 15:08:55,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7043 states to 7043 states and 8717 transitions. [2022-11-23 15:08:55,304 INFO L78 Accepts]: Start accepts. Automaton has 7043 states and 8717 transitions. Word has length 114 [2022-11-23 15:08:55,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:55,305 INFO L495 AbstractCegarLoop]: Abstraction has 7043 states and 8717 transitions. [2022-11-23 15:08:55,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 15:08:55,305 INFO L276 IsEmpty]: Start isEmpty. Operand 7043 states and 8717 transitions. [2022-11-23 15:08:55,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-23 15:08:55,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:55,326 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:08:55,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 15:08:55,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:55,534 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:55,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:55,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1796748787, now seen corresponding path program 1 times [2022-11-23 15:08:55,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:55,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066589168] [2022-11-23 15:08:55,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:55,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-23 15:08:55,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:55,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066589168] [2022-11-23 15:08:55,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066589168] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:08:55,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839691863] [2022-11-23 15:08:55,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:55,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:55,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:55,817 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:08:55,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 15:08:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:55,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 15:08:56,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:56,058 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:08:56,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:08:56,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839691863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:56,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:08:56,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-23 15:08:56,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928192418] [2022-11-23 15:08:56,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:56,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:08:56,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:56,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:08:56,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:08:56,062 INFO L87 Difference]: Start difference. First operand 7043 states and 8717 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-23 15:08:56,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:56,944 INFO L93 Difference]: Finished difference Result 10154 states and 12597 transitions. [2022-11-23 15:08:56,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:08:56,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 116 [2022-11-23 15:08:56,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:56,976 INFO L225 Difference]: With dead ends: 10154 [2022-11-23 15:08:56,976 INFO L226 Difference]: Without dead ends: 7527 [2022-11-23 15:08:56,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:08:56,988 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 104 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:56,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 424 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:08:56,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7527 states. [2022-11-23 15:08:57,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7527 to 7303. [2022-11-23 15:08:57,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7303 states, 5940 states have (on average 1.2533670033670035) internal successors, (7445), 5974 states have internal predecessors, (7445), 744 states have call successors, (744), 594 states have call predecessors, (744), 618 states have return successors, (816), 735 states have call predecessors, (816), 744 states have call successors, (816) [2022-11-23 15:08:57,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7303 states to 7303 states and 9005 transitions. [2022-11-23 15:08:57,766 INFO L78 Accepts]: Start accepts. Automaton has 7303 states and 9005 transitions. Word has length 116 [2022-11-23 15:08:57,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:57,767 INFO L495 AbstractCegarLoop]: Abstraction has 7303 states and 9005 transitions. [2022-11-23 15:08:57,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-23 15:08:57,767 INFO L276 IsEmpty]: Start isEmpty. Operand 7303 states and 9005 transitions. [2022-11-23 15:08:57,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-23 15:08:57,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:57,783 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:08:57,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 15:08:57,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 15:08:57,991 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:57,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:57,991 INFO L85 PathProgramCache]: Analyzing trace with hash 263649726, now seen corresponding path program 1 times [2022-11-23 15:08:57,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:57,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078501264] [2022-11-23 15:08:57,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:57,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-23 15:08:58,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:58,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078501264] [2022-11-23 15:08:58,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078501264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:08:58,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971549789] [2022-11-23 15:08:58,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:58,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:58,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:58,240 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:08:58,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 15:08:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:58,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:08:58,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 15:08:58,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:08:58,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971549789] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:58,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:08:58,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 15:08:58,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849032161] [2022-11-23 15:08:58,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:58,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:08:58,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:58,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:08:58,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:08:58,443 INFO L87 Difference]: Start difference. First operand 7303 states and 9005 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 15:08:58,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:58,947 INFO L93 Difference]: Finished difference Result 9996 states and 12452 transitions. [2022-11-23 15:08:58,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:08:58,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2022-11-23 15:08:58,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:58,970 INFO L225 Difference]: With dead ends: 9996 [2022-11-23 15:08:58,971 INFO L226 Difference]: Without dead ends: 7045 [2022-11-23 15:08:58,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:08:58,980 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 21 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:58,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 213 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:08:58,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7045 states. [2022-11-23 15:08:59,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7045 to 6625. [2022-11-23 15:08:59,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6625 states, 5370 states have (on average 1.2562383612662942) internal successors, (6746), 5377 states have internal predecessors, (6746), 708 states have call successors, (708), 558 states have call predecessors, (708), 546 states have return successors, (744), 690 states have call predecessors, (744), 708 states have call successors, (744) [2022-11-23 15:08:59,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6625 states to 6625 states and 8198 transitions. [2022-11-23 15:08:59,615 INFO L78 Accepts]: Start accepts. Automaton has 6625 states and 8198 transitions. Word has length 117 [2022-11-23 15:08:59,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:59,615 INFO L495 AbstractCegarLoop]: Abstraction has 6625 states and 8198 transitions. [2022-11-23 15:08:59,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 15:08:59,616 INFO L276 IsEmpty]: Start isEmpty. Operand 6625 states and 8198 transitions. [2022-11-23 15:08:59,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-23 15:08:59,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:59,631 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:08:59,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 15:08:59,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 15:08:59,838 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:59,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:59,839 INFO L85 PathProgramCache]: Analyzing trace with hash -584897462, now seen corresponding path program 1 times [2022-11-23 15:08:59,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:59,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410267840] [2022-11-23 15:08:59,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:59,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:09:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-23 15:09:00,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:09:00,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410267840] [2022-11-23 15:09:00,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410267840] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:09:00,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224951329] [2022-11-23 15:09:00,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:09:00,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:09:00,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:09:00,089 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:09:00,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 15:09:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:09:00,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:09:00,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:09:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 15:09:00,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:09:00,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224951329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:09:00,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:09:00,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 15:09:00,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081402212] [2022-11-23 15:09:00,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:09:00,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:09:00,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:09:00,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:09:00,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:09:00,329 INFO L87 Difference]: Start difference. First operand 6625 states and 8198 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 15:09:01,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:09:01,162 INFO L93 Difference]: Finished difference Result 15683 states and 19643 transitions. [2022-11-23 15:09:01,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:09:01,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2022-11-23 15:09:01,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:09:01,205 INFO L225 Difference]: With dead ends: 15683 [2022-11-23 15:09:01,205 INFO L226 Difference]: Without dead ends: 9120 [2022-11-23 15:09:01,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:09:01,225 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 48 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:09:01,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 219 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:09:01,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9120 states. [2022-11-23 15:09:02,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9120 to 7317. [2022-11-23 15:09:02,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7317 states, 5964 states have (on average 1.266934942991281) internal successors, (7556), 5972 states have internal predecessors, (7556), 757 states have call successors, (757), 607 states have call predecessors, (757), 595 states have return successors, (793), 738 states have call predecessors, (793), 757 states have call successors, (793) [2022-11-23 15:09:02,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7317 states to 7317 states and 9106 transitions. [2022-11-23 15:09:02,393 INFO L78 Accepts]: Start accepts. Automaton has 7317 states and 9106 transitions. Word has length 117 [2022-11-23 15:09:02,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:09:02,394 INFO L495 AbstractCegarLoop]: Abstraction has 7317 states and 9106 transitions. [2022-11-23 15:09:02,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 15:09:02,395 INFO L276 IsEmpty]: Start isEmpty. Operand 7317 states and 9106 transitions. [2022-11-23 15:09:02,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-23 15:09:02,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:09:02,422 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:09:02,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 15:09:02,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 15:09:02,630 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:09:02,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:09:02,630 INFO L85 PathProgramCache]: Analyzing trace with hash 413587060, now seen corresponding path program 1 times [2022-11-23 15:09:02,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:09:02,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656730392] [2022-11-23 15:09:02,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:09:02,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:09:02,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:09:02,930 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 41 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 15:09:02,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:09:02,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656730392] [2022-11-23 15:09:02,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656730392] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:09:02,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306430467] [2022-11-23 15:09:02,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:09:02,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:09:02,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:09:02,933 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:09:02,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 15:09:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:09:03,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 15:09:03,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:09:03,235 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:09:03,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:09:03,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306430467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:09:03,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:09:03,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-23 15:09:03,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758053600] [2022-11-23 15:09:03,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:09:03,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:09:03,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:09:03,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:09:03,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:09:03,239 INFO L87 Difference]: Start difference. First operand 7317 states and 9106 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-23 15:09:04,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:09:04,623 INFO L93 Difference]: Finished difference Result 14378 states and 17965 transitions. [2022-11-23 15:09:04,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:09:04,624 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 118 [2022-11-23 15:09:04,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:09:04,659 INFO L225 Difference]: With dead ends: 14378 [2022-11-23 15:09:04,660 INFO L226 Difference]: Without dead ends: 9372 [2022-11-23 15:09:04,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:09:04,675 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 191 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:09:04,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 366 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:09:04,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9372 states. [2022-11-23 15:09:05,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9372 to 8837. [2022-11-23 15:09:05,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8837 states, 7184 states have (on average 1.257238307349666) internal successors, (9032), 7180 states have internal predecessors, (9032), 937 states have call successors, (937), 745 states have call predecessors, (937), 715 states have return successors, (991), 912 states have call predecessors, (991), 937 states have call successors, (991) [2022-11-23 15:09:05,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8837 states to 8837 states and 10960 transitions. [2022-11-23 15:09:05,746 INFO L78 Accepts]: Start accepts. Automaton has 8837 states and 10960 transitions. Word has length 118 [2022-11-23 15:09:05,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:09:05,747 INFO L495 AbstractCegarLoop]: Abstraction has 8837 states and 10960 transitions. [2022-11-23 15:09:05,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-23 15:09:05,747 INFO L276 IsEmpty]: Start isEmpty. Operand 8837 states and 10960 transitions. [2022-11-23 15:09:05,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 15:09:05,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:09:05,759 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:09:05,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 15:09:05,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:09:05,967 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:09:05,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:09:05,967 INFO L85 PathProgramCache]: Analyzing trace with hash -399675774, now seen corresponding path program 1 times [2022-11-23 15:09:05,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:09:05,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949859142] [2022-11-23 15:09:05,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:09:05,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:09:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:09:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-23 15:09:06,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:09:06,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949859142] [2022-11-23 15:09:06,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949859142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:09:06,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726269974] [2022-11-23 15:09:06,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:09:06,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:09:06,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:09:06,080 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:09:06,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 15:09:06,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:09:06,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:09:06,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:09:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 15:09:06,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:09:06,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726269974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:09:06,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:09:06,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 15:09:06,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981093589] [2022-11-23 15:09:06,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:09:06,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:09:06,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:09:06,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:09:06,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:09:06,261 INFO L87 Difference]: Start difference. First operand 8837 states and 10960 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 15:09:07,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:09:07,107 INFO L93 Difference]: Finished difference Result 16289 states and 20390 transitions. [2022-11-23 15:09:07,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:09:07,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 113 [2022-11-23 15:09:07,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:09:07,139 INFO L225 Difference]: With dead ends: 16289 [2022-11-23 15:09:07,139 INFO L226 Difference]: Without dead ends: 10643 [2022-11-23 15:09:07,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:09:07,150 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 51 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:09:07,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 262 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:09:07,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10643 states. [2022-11-23 15:09:08,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10643 to 9689. [2022-11-23 15:09:08,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9689 states, 7908 states have (on average 1.2701062215477996) internal successors, (10044), 7904 states have internal predecessors, (10044), 1001 states have call successors, (1001), 809 states have call predecessors, (1001), 779 states have return successors, (1055), 976 states have call predecessors, (1055), 1001 states have call successors, (1055) [2022-11-23 15:09:08,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9689 states to 9689 states and 12100 transitions. [2022-11-23 15:09:08,236 INFO L78 Accepts]: Start accepts. Automaton has 9689 states and 12100 transitions. Word has length 113 [2022-11-23 15:09:08,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:09:08,237 INFO L495 AbstractCegarLoop]: Abstraction has 9689 states and 12100 transitions. [2022-11-23 15:09:08,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 15:09:08,237 INFO L276 IsEmpty]: Start isEmpty. Operand 9689 states and 12100 transitions. [2022-11-23 15:09:08,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 15:09:08,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:09:08,251 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:09:08,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 15:09:08,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:09:08,466 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:09:08,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:09:08,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1461185143, now seen corresponding path program 1 times [2022-11-23 15:09:08,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:09:08,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852971915] [2022-11-23 15:09:08,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:09:08,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:09:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:09:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 15:09:09,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:09:09,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852971915] [2022-11-23 15:09:09,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852971915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:09:09,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:09:09,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-23 15:09:09,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125066621] [2022-11-23 15:09:09,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:09:09,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 15:09:09,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:09:09,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 15:09:09,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:09:09,133 INFO L87 Difference]: Start difference. First operand 9689 states and 12100 transitions. Second operand has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 8 states have internal predecessors, (69), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-23 15:09:12,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:09:12,196 INFO L93 Difference]: Finished difference Result 21685 states and 27606 transitions. [2022-11-23 15:09:12,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 15:09:12,197 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 8 states have internal predecessors, (69), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 113 [2022-11-23 15:09:12,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:09:12,252 INFO L225 Difference]: With dead ends: 21685 [2022-11-23 15:09:12,252 INFO L226 Difference]: Without dead ends: 16784 [2022-11-23 15:09:12,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:09:12,268 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 560 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:09:12,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 423 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 15:09:12,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16784 states. [2022-11-23 15:09:13,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16784 to 13786. [2022-11-23 15:09:13,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13786 states, 11345 states have (on average 1.25165271044513) internal successors, (14200), 11374 states have internal predecessors, (14200), 1331 states have call successors, (1331), 1106 states have call predecessors, (1331), 1109 states have return successors, (1439), 1306 states have call predecessors, (1439), 1331 states have call successors, (1439) [2022-11-23 15:09:14,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13786 states to 13786 states and 16970 transitions. [2022-11-23 15:09:14,022 INFO L78 Accepts]: Start accepts. Automaton has 13786 states and 16970 transitions. Word has length 113 [2022-11-23 15:09:14,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:09:14,022 INFO L495 AbstractCegarLoop]: Abstraction has 13786 states and 16970 transitions. [2022-11-23 15:09:14,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 8 states have internal predecessors, (69), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-23 15:09:14,023 INFO L276 IsEmpty]: Start isEmpty. Operand 13786 states and 16970 transitions. [2022-11-23 15:09:14,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 15:09:14,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:09:14,037 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:09:14,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-23 15:09:14,038 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:09:14,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:09:14,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1062311178, now seen corresponding path program 1 times [2022-11-23 15:09:14,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:09:14,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912560957] [2022-11-23 15:09:14,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:09:14,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:09:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:09:14,108 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 15:09:14,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:09:14,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912560957] [2022-11-23 15:09:14,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912560957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:09:14,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:09:14,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:09:14,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242974410] [2022-11-23 15:09:14,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:09:14,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:09:14,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:09:14,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:09:14,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:09:14,111 INFO L87 Difference]: Start difference. First operand 13786 states and 16970 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 15:09:16,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:09:16,120 INFO L93 Difference]: Finished difference Result 19194 states and 23912 transitions. [2022-11-23 15:09:16,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:09:16,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 113 [2022-11-23 15:09:16,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:09:16,161 INFO L225 Difference]: With dead ends: 19194 [2022-11-23 15:09:16,161 INFO L226 Difference]: Without dead ends: 13654 [2022-11-23 15:09:16,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:09:16,174 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 201 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:09:16,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 298 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:09:16,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13654 states. [2022-11-23 15:09:17,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13654 to 13630. [2022-11-23 15:09:17,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13630 states, 11198 states have (on average 1.2407572780853724) internal successors, (13894), 11218 states have internal predecessors, (13894), 1331 states have call successors, (1331), 1106 states have call predecessors, (1331), 1100 states have return successors, (1430), 1306 states have call predecessors, (1430), 1331 states have call successors, (1430) [2022-11-23 15:09:17,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13630 states to 13630 states and 16655 transitions. [2022-11-23 15:09:17,446 INFO L78 Accepts]: Start accepts. Automaton has 13630 states and 16655 transitions. Word has length 113 [2022-11-23 15:09:17,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:09:17,447 INFO L495 AbstractCegarLoop]: Abstraction has 13630 states and 16655 transitions. [2022-11-23 15:09:17,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 15:09:17,447 INFO L276 IsEmpty]: Start isEmpty. Operand 13630 states and 16655 transitions. [2022-11-23 15:09:17,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-23 15:09:17,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:09:17,461 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:09:17,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-23 15:09:17,462 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:09:17,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:09:17,462 INFO L85 PathProgramCache]: Analyzing trace with hash 163584257, now seen corresponding path program 1 times [2022-11-23 15:09:17,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:09:17,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992953490] [2022-11-23 15:09:17,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:09:17,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:09:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:09:17,698 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 15:09:17,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:09:17,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992953490] [2022-11-23 15:09:17,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992953490] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:09:17,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:09:17,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:09:17,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819783592] [2022-11-23 15:09:17,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:09:17,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:09:17,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:09:17,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:09:17,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:09:17,701 INFO L87 Difference]: Start difference. First operand 13630 states and 16655 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 15:09:19,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:09:19,840 INFO L93 Difference]: Finished difference Result 22966 states and 28070 transitions. [2022-11-23 15:09:19,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:09:19,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 114 [2022-11-23 15:09:19,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:09:19,886 INFO L225 Difference]: With dead ends: 22966 [2022-11-23 15:09:19,886 INFO L226 Difference]: Without dead ends: 17582 [2022-11-23 15:09:19,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:09:19,900 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 103 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:09:19,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 333 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:09:19,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17582 states. [2022-11-23 15:09:22,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17582 to 17049. [2022-11-23 15:09:22,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17049 states, 13907 states have (on average 1.2295966060257424) internal successors, (17100), 13969 states have internal predecessors, (17100), 1725 states have call successors, (1725), 1416 states have call predecessors, (1725), 1416 states have return successors, (1932), 1664 states have call predecessors, (1932), 1725 states have call successors, (1932) [2022-11-23 15:09:22,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17049 states to 17049 states and 20757 transitions. [2022-11-23 15:09:22,245 INFO L78 Accepts]: Start accepts. Automaton has 17049 states and 20757 transitions. Word has length 114 [2022-11-23 15:09:22,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:09:22,246 INFO L495 AbstractCegarLoop]: Abstraction has 17049 states and 20757 transitions. [2022-11-23 15:09:22,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 15:09:22,247 INFO L276 IsEmpty]: Start isEmpty. Operand 17049 states and 20757 transitions. [2022-11-23 15:09:22,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-23 15:09:22,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:09:22,264 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:09:22,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-23 15:09:22,264 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:09:22,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:09:22,265 INFO L85 PathProgramCache]: Analyzing trace with hash 134362487, now seen corresponding path program 1 times [2022-11-23 15:09:22,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:09:22,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441617660] [2022-11-23 15:09:22,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:09:22,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:09:22,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:09:23,135 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 15:09:23,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:09:23,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441617660] [2022-11-23 15:09:23,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441617660] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:09:23,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547992001] [2022-11-23 15:09:23,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:09:23,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:09:23,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:09:23,138 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:09:23,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 15:09:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:09:23,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 15:09:23,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:09:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:09:23,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:09:23,956 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-23 15:09:23,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547992001] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:09:23,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1872762619] [2022-11-23 15:09:23,998 INFO L159 IcfgInterpreter]: Started Sifa with 67 locations of interest [2022-11-23 15:09:23,998 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:09:24,014 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:09:24,024 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:09:24,025 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:09:32,884 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 124 for LOIs [2022-11-23 15:09:39,443 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 167 for LOIs [2022-11-23 15:09:49,396 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 135 for LOIs [2022-11-23 15:09:49,445 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 92 for LOIs [2022-11-23 15:09:49,468 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 48 for LOIs [2022-11-23 15:09:49,816 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 68 for LOIs [2022-11-23 15:09:50,632 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:10:08,005 WARN L233 SmtUtils]: Spent 15.84s on a formula simplification. DAG size of input: 520 DAG size of output: 474 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:10:20,819 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '481967#(and (<= ~local~0 2147483647) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_pc~0 0) (= ~t1_i~0 1) (<= 0 (+ ~local~0 2147483648)) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= 0 ~t3_pc~0) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= ~m_pc~0 1) (= ~m_i~0 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~t2_i~0 1) (= 0 ~t2_pc~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= |#NULL.base| 0))' at error location [2022-11-23 15:10:20,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:10:20,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:10:20,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 19 [2022-11-23 15:10:20,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922621231] [2022-11-23 15:10:20,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:10:20,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-23 15:10:20,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:10:20,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-23 15:10:20,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=4023, Unknown=0, NotChecked=0, Total=4556 [2022-11-23 15:10:20,823 INFO L87 Difference]: Start difference. First operand 17049 states and 20757 transitions. Second operand has 19 states, 15 states have (on average 9.6) internal successors, (144), 17 states have internal predecessors, (144), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-23 15:10:25,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:10:25,746 INFO L93 Difference]: Finished difference Result 33161 states and 41100 transitions. [2022-11-23 15:10:25,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-23 15:10:25,747 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 9.6) internal successors, (144), 17 states have internal predecessors, (144), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 119 [2022-11-23 15:10:25,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:10:25,781 INFO L225 Difference]: With dead ends: 33161 [2022-11-23 15:10:25,782 INFO L226 Difference]: Without dead ends: 16074 [2022-11-23 15:10:25,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 348 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8725 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=1653, Invalid=19227, Unknown=0, NotChecked=0, Total=20880 [2022-11-23 15:10:25,809 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 1505 mSDsluCounter, 2020 mSDsCounter, 0 mSdLazyCounter, 2221 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 2252 SdHoareTripleChecker+Invalid, 2663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 2221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:10:25,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1516 Valid, 2252 Invalid, 2663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 2221 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-23 15:10:25,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16074 states. [2022-11-23 15:10:26,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16074 to 10676. [2022-11-23 15:10:26,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10676 states, 8750 states have (on average 1.2326857142857144) internal successors, (10786), 8781 states have internal predecessors, (10786), 1024 states have call successors, (1024), 901 states have call predecessors, (1024), 901 states have return successors, (1093), 993 states have call predecessors, (1093), 1024 states have call successors, (1093) [2022-11-23 15:10:26,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10676 states to 10676 states and 12903 transitions. [2022-11-23 15:10:26,964 INFO L78 Accepts]: Start accepts. Automaton has 10676 states and 12903 transitions. Word has length 119 [2022-11-23 15:10:26,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:10:26,964 INFO L495 AbstractCegarLoop]: Abstraction has 10676 states and 12903 transitions. [2022-11-23 15:10:26,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 9.6) internal successors, (144), 17 states have internal predecessors, (144), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-23 15:10:26,965 INFO L276 IsEmpty]: Start isEmpty. Operand 10676 states and 12903 transitions. [2022-11-23 15:10:26,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-23 15:10:26,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:10:26,972 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:10:26,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 15:10:27,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:10:27,178 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:10:27,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:10:27,179 INFO L85 PathProgramCache]: Analyzing trace with hash 795512980, now seen corresponding path program 1 times [2022-11-23 15:10:27,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:10:27,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412158680] [2022-11-23 15:10:27,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:10:27,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:10:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:10:27,816 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 15:10:27,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:10:27,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412158680] [2022-11-23 15:10:27,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412158680] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:10:27,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096696315] [2022-11-23 15:10:27,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:10:27,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:10:27,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:10:27,828 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:10:27,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 15:10:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:10:27,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 15:10:27,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:10:28,140 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:10:28,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:10:28,476 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-23 15:10:28,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096696315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:10:28,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1486770361] [2022-11-23 15:10:28,480 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2022-11-23 15:10:28,480 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:10:28,481 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:10:28,481 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:10:28,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:10:32,611 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 124 for LOIs [2022-11-23 15:10:43,295 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 167 for LOIs [2022-11-23 15:10:48,432 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 135 for LOIs [2022-11-23 15:10:48,461 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 60 for LOIs [2022-11-23 15:10:48,472 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 48 for LOIs [2022-11-23 15:10:48,530 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 68 for LOIs [2022-11-23 15:10:49,033 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:10:58,112 WARN L233 SmtUtils]: Spent 8.08s on a formula simplification. DAG size of input: 354 DAG size of output: 308 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:11:09,997 WARN L233 SmtUtils]: Spent 7.63s on a formula simplification. DAG size of input: 446 DAG size of output: 301 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:11:17,547 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '543111#(and (<= ~t1_pc~0 1) (<= ~local~0 2147483647) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (<= 0 (+ ~local~0 2147483648)) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= 0 ~t3_pc~0) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (= ~m_pc~0 1) (= ~m_i~0 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~t2_i~0 1) (= 0 ~t2_pc~0) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-23 15:11:17,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:11:17,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:11:17,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 21 [2022-11-23 15:11:17,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077337490] [2022-11-23 15:11:17,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:11:17,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 15:11:17,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:11:17,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 15:11:17,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=4471, Unknown=0, NotChecked=0, Total=4970 [2022-11-23 15:11:17,552 INFO L87 Difference]: Start difference. First operand 10676 states and 12903 transitions. Second operand has 21 states, 17 states have (on average 9.0) internal successors, (153), 19 states have internal predecessors, (153), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-23 15:11:22,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:11:22,194 INFO L93 Difference]: Finished difference Result 22759 states and 27884 transitions. [2022-11-23 15:11:22,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-11-23 15:11:22,195 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 9.0) internal successors, (153), 19 states have internal predecessors, (153), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 122 [2022-11-23 15:11:22,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:11:22,225 INFO L225 Difference]: With dead ends: 22759 [2022-11-23 15:11:22,225 INFO L226 Difference]: Without dead ends: 12938 [2022-11-23 15:11:22,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 347 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8438 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=1550, Invalid=19042, Unknown=0, NotChecked=0, Total=20592 [2022-11-23 15:11:22,247 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 828 mSDsluCounter, 2865 mSDsCounter, 0 mSdLazyCounter, 2611 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 3121 SdHoareTripleChecker+Invalid, 2915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 2611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:11:22,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [834 Valid, 3121 Invalid, 2915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 2611 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-23 15:11:22,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12938 states. [2022-11-23 15:11:23,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12938 to 7490. [2022-11-23 15:11:23,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7490 states, 6222 states have (on average 1.2457409193185471) internal successors, (7751), 6233 states have internal predecessors, (7751), 656 states have call successors, (656), 615 states have call predecessors, (656), 611 states have return successors, (679), 641 states have call predecessors, (679), 656 states have call successors, (679) [2022-11-23 15:11:23,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7490 states to 7490 states and 9086 transitions. [2022-11-23 15:11:23,062 INFO L78 Accepts]: Start accepts. Automaton has 7490 states and 9086 transitions. Word has length 122 [2022-11-23 15:11:23,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:11:23,063 INFO L495 AbstractCegarLoop]: Abstraction has 7490 states and 9086 transitions. [2022-11-23 15:11:23,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 9.0) internal successors, (153), 19 states have internal predecessors, (153), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-23 15:11:23,063 INFO L276 IsEmpty]: Start isEmpty. Operand 7490 states and 9086 transitions. [2022-11-23 15:11:23,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-23 15:11:23,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:11:23,068 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:11:23,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 15:11:23,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:11:23,276 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:11:23,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:11:23,276 INFO L85 PathProgramCache]: Analyzing trace with hash 356584013, now seen corresponding path program 1 times [2022-11-23 15:11:23,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:11:23,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140694763] [2022-11-23 15:11:23,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:11:23,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:11:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:11:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-23 15:11:23,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:11:23,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140694763] [2022-11-23 15:11:23,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140694763] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:11:23,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852628387] [2022-11-23 15:11:23,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:11:23,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:11:23,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:11:23,518 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:11:23,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 15:11:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:11:23,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 15:11:23,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:11:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:11:23,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:11:24,235 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-23 15:11:24,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852628387] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:11:24,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [886416936] [2022-11-23 15:11:24,238 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2022-11-23 15:11:24,238 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:11:24,239 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:11:24,239 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:11:24,239 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:11:28,096 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 124 for LOIs [2022-11-23 15:12:26,973 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 167 for LOIs [2022-11-23 15:12:31,501 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 135 for LOIs [2022-11-23 15:12:31,524 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 60 for LOIs [2022-11-23 15:12:31,537 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 50 for LOIs [2022-11-23 15:12:31,609 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 68 for LOIs [2022-11-23 15:12:31,782 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:12:37,742 WARN L233 SmtUtils]: Spent 5.20s on a formula simplification. DAG size of input: 280 DAG size of output: 234 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:13:15,516 WARN L233 SmtUtils]: Spent 32.74s on a formula simplification. DAG size of input: 1582 DAG size of output: 1055 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:13:24,842 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '585300#(and (<= ~t1_pc~0 1) (<= ~local~0 2147483647) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (<= 0 (+ ~local~0 2147483648)) (<= 0 ~t2_pc~0) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= 0 ~t3_pc~0) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= ~m_pc~0 1) (<= ~t2_pc~0 1) (= ~m_i~0 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~t2_i~0 1) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-23 15:13:24,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:13:24,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:13:24,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 6] total 17 [2022-11-23 15:13:24,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725636356] [2022-11-23 15:13:24,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:13:24,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 15:13:24,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:13:24,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 15:13:24,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=522, Invalid=4734, Unknown=0, NotChecked=0, Total=5256 [2022-11-23 15:13:24,846 INFO L87 Difference]: Start difference. First operand 7490 states and 9086 transitions. Second operand has 17 states, 14 states have (on average 9.142857142857142) internal successors, (128), 15 states have internal predecessors, (128), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) [2022-11-23 15:13:32,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:13:32,095 INFO L93 Difference]: Finished difference Result 19862 states and 24570 transitions. [2022-11-23 15:13:32,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-11-23 15:13:32,100 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 9.142857142857142) internal successors, (128), 15 states have internal predecessors, (128), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) Word has length 124 [2022-11-23 15:13:32,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:13:32,124 INFO L225 Difference]: With dead ends: 19862 [2022-11-23 15:13:32,124 INFO L226 Difference]: Without dead ends: 12936 [2022-11-23 15:13:32,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 379 SyntacticMatches, 5 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22415 ImplicationChecksByTransitivity, 56.8s TimeCoverageRelationStatistics Valid=3774, Invalid=47076, Unknown=0, NotChecked=0, Total=50850 [2022-11-23 15:13:32,141 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 1079 mSDsluCounter, 3011 mSDsCounter, 0 mSdLazyCounter, 2465 mSolverCounterSat, 457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 3385 SdHoareTripleChecker+Invalid, 2922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 457 IncrementalHoareTripleChecker+Valid, 2465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:13:32,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1086 Valid, 3385 Invalid, 2922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [457 Valid, 2465 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-23 15:13:32,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12936 states. [2022-11-23 15:13:33,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12936 to 9244. [2022-11-23 15:13:33,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9244 states, 7664 states have (on average 1.2175104384133613) internal successors, (9331), 7683 states have internal predecessors, (9331), 808 states have call successors, (808), 764 states have call predecessors, (808), 771 states have return successors, (989), 796 states have call predecessors, (989), 808 states have call successors, (989) [2022-11-23 15:13:33,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9244 states to 9244 states and 11128 transitions. [2022-11-23 15:13:33,091 INFO L78 Accepts]: Start accepts. Automaton has 9244 states and 11128 transitions. Word has length 124 [2022-11-23 15:13:33,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:13:33,091 INFO L495 AbstractCegarLoop]: Abstraction has 9244 states and 11128 transitions. [2022-11-23 15:13:33,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 9.142857142857142) internal successors, (128), 15 states have internal predecessors, (128), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) [2022-11-23 15:13:33,091 INFO L276 IsEmpty]: Start isEmpty. Operand 9244 states and 11128 transitions. [2022-11-23 15:13:33,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-23 15:13:33,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:13:33,098 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:13:33,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-23 15:13:33,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-23 15:13:33,304 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:13:33,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:13:33,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1199577155, now seen corresponding path program 1 times [2022-11-23 15:13:33,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:13:33,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385567481] [2022-11-23 15:13:33,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:13:33,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:13:33,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:13:34,125 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 15:13:34,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:13:34,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385567481] [2022-11-23 15:13:34,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385567481] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:13:34,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937377952] [2022-11-23 15:13:34,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:13:34,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:13:34,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:13:34,127 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:13:34,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-23 15:13:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:13:34,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 15:13:34,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:13:34,670 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 15:13:34,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:13:35,447 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-23 15:13:35,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937377952] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:13:35,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [447909290] [2022-11-23 15:13:35,451 INFO L159 IcfgInterpreter]: Started Sifa with 76 locations of interest [2022-11-23 15:13:35,451 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:13:35,451 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:13:35,452 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:13:35,452 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:13:40,998 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 60 for LOIs [2022-11-23 15:13:41,014 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 85 for LOIs [2022-11-23 15:13:41,032 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 85 for LOIs [2022-11-23 15:13:41,043 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 39 for LOIs [2022-11-23 15:13:41,048 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 51 for LOIs [2022-11-23 15:13:41,114 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 60 for LOIs [2022-11-23 15:13:41,359 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:13:58,236 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '625857#(and (<= ~t1_pc~0 1) (<= ~local~0 2147483647) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (<= 0 (+ ~local~0 2147483648)) (<= 0 ~t2_pc~0) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= ~m_pc~0 1) (<= ~t2_pc~0 1) (= ~m_i~0 1) (not (= ~token~0 (+ 3 ~local~0))) (<= ~t3_pc~0 1) (= ~t2_i~0 1) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (<= 0 ~t3_pc~0) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-23 15:13:58,236 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:13:58,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:13:58,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 12] total 36 [2022-11-23 15:13:58,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956808520] [2022-11-23 15:13:58,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:13:58,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-23 15:13:58,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:13:58,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-23 15:13:58,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=657, Invalid=8273, Unknown=0, NotChecked=0, Total=8930 [2022-11-23 15:13:58,239 INFO L87 Difference]: Start difference. First operand 9244 states and 11128 transitions. Second operand has 36 states, 24 states have (on average 8.041666666666666) internal successors, (193), 27 states have internal predecessors, (193), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2022-11-23 15:14:06,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:06,523 INFO L93 Difference]: Finished difference Result 20583 states and 24905 transitions. [2022-11-23 15:14:06,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-23 15:14:06,531 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 24 states have (on average 8.041666666666666) internal successors, (193), 27 states have internal predecessors, (193), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) Word has length 126 [2022-11-23 15:14:06,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:06,551 INFO L225 Difference]: With dead ends: 20583 [2022-11-23 15:14:06,551 INFO L226 Difference]: Without dead ends: 13726 [2022-11-23 15:14:06,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 305 SyntacticMatches, 18 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10934 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=2575, Invalid=23185, Unknown=0, NotChecked=0, Total=25760 [2022-11-23 15:14:06,560 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 4759 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 3325 mSolverCounterSat, 1896 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4759 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 5221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1896 IncrementalHoareTripleChecker+Valid, 3325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:06,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4759 Valid, 993 Invalid, 5221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1896 Valid, 3325 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-23 15:14:06,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13726 states. [2022-11-23 15:14:07,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13726 to 9044. [2022-11-23 15:14:07,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9044 states, 7465 states have (on average 1.2179504353650368) internal successors, (9092), 7489 states have internal predecessors, (9092), 811 states have call successors, (811), 755 states have call predecessors, (811), 767 states have return successors, (943), 799 states have call predecessors, (943), 811 states have call successors, (943) [2022-11-23 15:14:07,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9044 states to 9044 states and 10846 transitions. [2022-11-23 15:14:07,600 INFO L78 Accepts]: Start accepts. Automaton has 9044 states and 10846 transitions. Word has length 126 [2022-11-23 15:14:07,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:07,601 INFO L495 AbstractCegarLoop]: Abstraction has 9044 states and 10846 transitions. [2022-11-23 15:14:07,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 24 states have (on average 8.041666666666666) internal successors, (193), 27 states have internal predecessors, (193), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2022-11-23 15:14:07,601 INFO L276 IsEmpty]: Start isEmpty. Operand 9044 states and 10846 transitions. [2022-11-23 15:14:07,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-23 15:14:07,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:07,605 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:14:07,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-23 15:14:07,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-23 15:14:07,805 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:07,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:07,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1181254839, now seen corresponding path program 1 times [2022-11-23 15:14:07,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:07,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098264968] [2022-11-23 15:14:07,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:07,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:07,941 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-23 15:14:07,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:07,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098264968] [2022-11-23 15:14:07,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098264968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:14:07,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177576510] [2022-11-23 15:14:07,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:07,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:07,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:14:07,944 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:14:07,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 15:14:08,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:08,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:14:08,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:14:08,151 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 15:14:08,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:14:08,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177576510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:14:08,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:14:08,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-23 15:14:08,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336215178] [2022-11-23 15:14:08,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:14:08,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:14:08,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:08,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:14:08,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:14:08,153 INFO L87 Difference]: Start difference. First operand 9044 states and 10846 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 15:14:09,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:09,341 INFO L93 Difference]: Finished difference Result 17869 states and 21508 transitions. [2022-11-23 15:14:09,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:14:09,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 140 [2022-11-23 15:14:09,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:09,355 INFO L225 Difference]: With dead ends: 17869 [2022-11-23 15:14:09,355 INFO L226 Difference]: Without dead ends: 9521 [2022-11-23 15:14:09,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:14:09,362 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 78 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:09,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 150 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:14:09,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9521 states. [2022-11-23 15:14:10,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9521 to 9308. [2022-11-23 15:14:10,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9308 states, 7713 states have (on average 1.2044600025930248) internal successors, (9290), 7737 states have internal predecessors, (9290), 811 states have call successors, (811), 771 states have call predecessors, (811), 783 states have return successors, (955), 799 states have call predecessors, (955), 811 states have call successors, (955) [2022-11-23 15:14:10,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9308 states to 9308 states and 11056 transitions. [2022-11-23 15:14:10,446 INFO L78 Accepts]: Start accepts. Automaton has 9308 states and 11056 transitions. Word has length 140 [2022-11-23 15:14:10,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:10,446 INFO L495 AbstractCegarLoop]: Abstraction has 9308 states and 11056 transitions. [2022-11-23 15:14:10,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 15:14:10,446 INFO L276 IsEmpty]: Start isEmpty. Operand 9308 states and 11056 transitions. [2022-11-23 15:14:10,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-23 15:14:10,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:10,451 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:14:10,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-23 15:14:10,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-23 15:14:10,657 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:10,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:10,658 INFO L85 PathProgramCache]: Analyzing trace with hash -601103667, now seen corresponding path program 1 times [2022-11-23 15:14:10,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:10,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848636229] [2022-11-23 15:14:10,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:10,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 42 proven. 8 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-23 15:14:10,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:10,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848636229] [2022-11-23 15:14:10,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848636229] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:14:10,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639278172] [2022-11-23 15:14:10,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:10,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:10,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:14:10,721 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:14:10,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-23 15:14:10,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:10,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:14:10,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:14:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 15:14:10,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:14:10,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639278172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:14:10,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:14:10,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-23 15:14:10,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437786812] [2022-11-23 15:14:10,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:14:10,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:14:10,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:10,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:14:10,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:14:10,956 INFO L87 Difference]: Start difference. First operand 9308 states and 11056 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-23 15:14:11,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:11,759 INFO L93 Difference]: Finished difference Result 14042 states and 16863 transitions. [2022-11-23 15:14:11,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:14:11,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 141 [2022-11-23 15:14:11,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:11,769 INFO L225 Difference]: With dead ends: 14042 [2022-11-23 15:14:11,769 INFO L226 Difference]: Without dead ends: 5449 [2022-11-23 15:14:11,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:14:11,778 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 64 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:11,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 215 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:14:11,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5449 states. [2022-11-23 15:14:12,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5449 to 5316. [2022-11-23 15:14:12,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5316 states, 4397 states have (on average 1.1660222879235842) internal successors, (5127), 4408 states have internal predecessors, (5127), 469 states have call successors, (469), 449 states have call predecessors, (469), 449 states have return successors, (481), 458 states have call predecessors, (481), 469 states have call successors, (481) [2022-11-23 15:14:12,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5316 states to 5316 states and 6077 transitions. [2022-11-23 15:14:12,469 INFO L78 Accepts]: Start accepts. Automaton has 5316 states and 6077 transitions. Word has length 141 [2022-11-23 15:14:12,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:12,470 INFO L495 AbstractCegarLoop]: Abstraction has 5316 states and 6077 transitions. [2022-11-23 15:14:12,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-23 15:14:12,470 INFO L276 IsEmpty]: Start isEmpty. Operand 5316 states and 6077 transitions. [2022-11-23 15:14:12,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-23 15:14:12,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:12,472 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:14:12,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-23 15:14:12,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-23 15:14:12,673 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:12,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:12,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1817421069, now seen corresponding path program 2 times [2022-11-23 15:14:12,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:12,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465443159] [2022-11-23 15:14:12,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:12,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:12,870 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 43 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-23 15:14:12,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:12,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465443159] [2022-11-23 15:14:12,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465443159] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:14:12,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624622682] [2022-11-23 15:14:12,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:14:12,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:12,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:14:12,872 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:14:12,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-23 15:14:13,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-23 15:14:13,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:14:13,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 15:14:13,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:14:13,097 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 15:14:13,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:14:13,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624622682] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:14:13,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:14:13,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-23 15:14:13,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629060564] [2022-11-23 15:14:13,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:14:13,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:14:13,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:13,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:14:13,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:14:13,099 INFO L87 Difference]: Start difference. First operand 5316 states and 6077 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-23 15:14:14,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:14,176 INFO L93 Difference]: Finished difference Result 11076 states and 12731 transitions. [2022-11-23 15:14:14,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:14:14,177 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 143 [2022-11-23 15:14:14,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:14,187 INFO L225 Difference]: With dead ends: 11076 [2022-11-23 15:14:14,188 INFO L226 Difference]: Without dead ends: 6585 [2022-11-23 15:14:14,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:14:14,193 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 213 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:14,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 334 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:14:14,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6585 states. [2022-11-23 15:14:14,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6585 to 6045. [2022-11-23 15:14:14,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6045 states, 4946 states have (on average 1.1522442377678932) internal successors, (5699), 4965 states have internal predecessors, (5699), 563 states have call successors, (563), 523 states have call predecessors, (563), 535 states have return successors, (625), 556 states have call predecessors, (625), 563 states have call successors, (625) [2022-11-23 15:14:14,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6045 states to 6045 states and 6887 transitions. [2022-11-23 15:14:14,933 INFO L78 Accepts]: Start accepts. Automaton has 6045 states and 6887 transitions. Word has length 143 [2022-11-23 15:14:14,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:14,933 INFO L495 AbstractCegarLoop]: Abstraction has 6045 states and 6887 transitions. [2022-11-23 15:14:14,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-23 15:14:14,934 INFO L276 IsEmpty]: Start isEmpty. Operand 6045 states and 6887 transitions. [2022-11-23 15:14:14,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-23 15:14:14,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:14,938 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:14:14,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-23 15:14:15,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-23 15:14:15,144 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:15,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:15,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1857649564, now seen corresponding path program 1 times [2022-11-23 15:14:15,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:15,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672693303] [2022-11-23 15:14:15,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:15,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-11-23 15:14:15,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:15,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672693303] [2022-11-23 15:14:15,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672693303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:14:15,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:14:15,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:14:15,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271388897] [2022-11-23 15:14:15,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:14:15,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:14:15,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:15,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:14:15,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:14:15,386 INFO L87 Difference]: Start difference. First operand 6045 states and 6887 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-23 15:14:18,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:18,590 INFO L93 Difference]: Finished difference Result 19295 states and 22108 transitions. [2022-11-23 15:14:18,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:14:18,591 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 172 [2022-11-23 15:14:18,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:18,619 INFO L225 Difference]: With dead ends: 19295 [2022-11-23 15:14:18,619 INFO L226 Difference]: Without dead ends: 16728 [2022-11-23 15:14:18,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:14:18,628 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 368 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:18,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 1121 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:14:18,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16728 states. [2022-11-23 15:14:20,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16728 to 10471. [2022-11-23 15:14:20,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10471 states, 8510 states have (on average 1.1486486486486487) internal successors, (9775), 8540 states have internal predecessors, (9775), 1018 states have call successors, (1018), 923 states have call predecessors, (1018), 942 states have return successors, (1136), 1007 states have call predecessors, (1136), 1018 states have call successors, (1136) [2022-11-23 15:14:20,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10471 states to 10471 states and 11929 transitions. [2022-11-23 15:14:20,161 INFO L78 Accepts]: Start accepts. Automaton has 10471 states and 11929 transitions. Word has length 172 [2022-11-23 15:14:20,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:20,162 INFO L495 AbstractCegarLoop]: Abstraction has 10471 states and 11929 transitions. [2022-11-23 15:14:20,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-23 15:14:20,162 INFO L276 IsEmpty]: Start isEmpty. Operand 10471 states and 11929 transitions. [2022-11-23 15:14:20,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-23 15:14:20,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:20,167 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:14:20,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-23 15:14:20,167 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:20,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:20,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1774534810, now seen corresponding path program 1 times [2022-11-23 15:14:20,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:20,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280660503] [2022-11-23 15:14:20,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:20,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 43 proven. 52 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-11-23 15:14:21,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:21,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280660503] [2022-11-23 15:14:21,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280660503] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:14:21,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523601511] [2022-11-23 15:14:21,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:21,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:21,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:14:21,016 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:14:21,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1718101f-1176-4ad5-ba7f-bc6524f1ed1d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-23 15:14:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:21,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-23 15:14:21,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:14:21,428 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-23 15:14:21,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:14:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 49 proven. 18 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-11-23 15:14:21,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523601511] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:14:21,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1598694335] [2022-11-23 15:14:21,943 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2022-11-23 15:14:21,944 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:14:21,944 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:14:21,944 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:14:21,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs