./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.2.prop1-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.2.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash da3c7b18fba80ae831b0cd08c5cdc7006df02217d3f1f102a3efb1e038053259 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:43:12,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:43:12,307 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:43:12,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:43:12,347 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:43:12,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:43:12,354 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:43:12,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:43:12,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:43:12,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:43:12,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:43:12,370 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:43:12,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:43:12,374 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:43:12,375 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:43:12,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:43:12,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:43:12,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:43:12,382 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:43:12,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:43:12,396 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:43:12,397 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:43:12,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:43:12,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:43:12,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:43:12,412 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:43:12,412 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:43:12,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:43:12,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:43:12,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:43:12,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:43:12,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:43:12,424 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:43:12,425 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:43:12,426 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:43:12,426 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:43:12,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:43:12,427 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:43:12,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:43:12,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:43:12,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:43:12,430 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:43:12,474 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:43:12,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:43:12,476 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:43:12,476 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:43:12,477 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:43:12,478 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:43:12,478 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:43:12,478 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:43:12,478 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:43:12,479 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:43:12,480 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:43:12,480 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:43:12,480 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:43:12,480 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:43:12,481 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:43:12,481 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:43:12,481 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:43:12,481 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:43:12,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:43:12,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:43:12,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:43:12,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:43:12,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:43:12,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:43:12,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:43:12,485 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:43:12,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:43:12,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:43:12,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:43:12,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:43:12,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:43:12,487 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:43:12,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:43:12,488 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:43:12,488 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:43:12,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:43:12,488 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:43:12,489 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:43:12,502 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_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da3c7b18fba80ae831b0cd08c5cdc7006df02217d3f1f102a3efb1e038053259 [2022-11-03 02:43:12,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:43:12,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:43:12,821 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:43:12,823 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:43:12,823 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:43:12,825 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.2.prop1-back-serstep.c [2022-11-03 02:43:12,912 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/data/0af577183/332dafa4d6784f7ea40010a82dc972e7/FLAG946cd9783 [2022-11-03 02:43:13,646 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:43:13,647 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.2.prop1-back-serstep.c [2022-11-03 02:43:13,658 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/data/0af577183/332dafa4d6784f7ea40010a82dc972e7/FLAG946cd9783 [2022-11-03 02:43:13,875 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/data/0af577183/332dafa4d6784f7ea40010a82dc972e7 [2022-11-03 02:43:13,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:43:13,885 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:43:13,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:43:13,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:43:13,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:43:13,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:43:13" (1/1) ... [2022-11-03 02:43:13,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77aa74fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:13, skipping insertion in model container [2022-11-03 02:43:13,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:43:13" (1/1) ... [2022-11-03 02:43:13,902 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:43:13,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:43:14,150 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.2.prop1-back-serstep.c[1014,1027] [2022-11-03 02:43:14,365 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:43:14,378 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:43:14,390 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.2.prop1-back-serstep.c[1014,1027] [2022-11-03 02:43:14,527 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:43:14,553 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:43:14,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:14 WrapperNode [2022-11-03 02:43:14,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:43:14,556 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:43:14,557 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:43:14,557 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:43:14,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:14" (1/1) ... [2022-11-03 02:43:14,617 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:14" (1/1) ... [2022-11-03 02:43:14,752 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 601 [2022-11-03 02:43:14,753 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:43:14,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:43:14,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:43:14,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:43:14,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:14" (1/1) ... [2022-11-03 02:43:14,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:14" (1/1) ... [2022-11-03 02:43:14,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:14" (1/1) ... [2022-11-03 02:43:14,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:14" (1/1) ... [2022-11-03 02:43:14,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:14" (1/1) ... [2022-11-03 02:43:14,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:14" (1/1) ... [2022-11-03 02:43:14,958 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:14" (1/1) ... [2022-11-03 02:43:14,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:14" (1/1) ... [2022-11-03 02:43:15,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:43:15,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:43:15,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:43:15,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:43:15,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:14" (1/1) ... [2022-11-03 02:43:15,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:43:15,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:15,052 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:43:15,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:43:15,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:43:15,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:43:15,400 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:43:15,402 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:43:19,332 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:43:21,766 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:43:21,766 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:43:21,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:43:21 BoogieIcfgContainer [2022-11-03 02:43:21,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:43:21,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:43:21,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:43:21,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:43:21,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:43:13" (1/3) ... [2022-11-03 02:43:21,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c1e4ab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:43:21, skipping insertion in model container [2022-11-03 02:43:21,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:14" (2/3) ... [2022-11-03 02:43:21,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c1e4ab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:43:21, skipping insertion in model container [2022-11-03 02:43:21,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:43:21" (3/3) ... [2022-11-03 02:43:21,781 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.adding.2.prop1-back-serstep.c [2022-11-03 02:43:21,804 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:43:21,804 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:43:21,877 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:43:21,897 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;@169850e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:43:21,898 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:43:21,903 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:21,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:43:21,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:21,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:43:21,920 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:21,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:21,929 INFO L85 PathProgramCache]: Analyzing trace with hash 4955334, now seen corresponding path program 1 times [2022-11-03 02:43:21,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:21,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682629905] [2022-11-03 02:43:21,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:21,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:22,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:24,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:24,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682629905] [2022-11-03 02:43:24,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682629905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:24,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:24,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:43:24,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764581652] [2022-11-03 02:43:24,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:24,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:43:24,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:24,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:43:24,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:43:24,842 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:27,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:43:27,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:27,519 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2022-11-03 02:43:27,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:43:27,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-03 02:43:27,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:27,529 INFO L225 Difference]: With dead ends: 15 [2022-11-03 02:43:27,530 INFO L226 Difference]: Without dead ends: 9 [2022-11-03 02:43:27,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:43:27,536 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:27,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 02:43:27,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-03 02:43:27,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2022-11-03 02:43:27,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:27,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2022-11-03 02:43:27,569 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2022-11-03 02:43:27,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:27,569 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2022-11-03 02:43:27,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:27,570 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2022-11-03 02:43:27,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 02:43:27,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:27,571 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-11-03 02:43:27,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:43:27,572 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:27,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:27,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1605099651, now seen corresponding path program 1 times [2022-11-03 02:43:27,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:27,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478883915] [2022-11-03 02:43:27,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:27,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:43:56,420 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:44:12,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:44:12,463 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:44:12,463 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:44:12,466 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:44:12,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:44:12,472 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-03 02:44:12,477 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:44:12,532 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:44:12,532 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:44:12,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:44:12 BoogieIcfgContainer [2022-11-03 02:44:12,564 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:44:12,565 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:44:12,565 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:44:12,565 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:44:12,566 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:43:21" (3/4) ... [2022-11-03 02:44:12,570 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:44:12,570 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:44:12,571 INFO L158 Benchmark]: Toolchain (without parser) took 58685.73ms. Allocated memory was 92.3MB in the beginning and 1.9GB in the end (delta: 1.8GB). Free memory was 69.7MB in the beginning and 1.7GB in the end (delta: -1.6GB). Peak memory consumption was 129.9MB. Max. memory is 16.1GB. [2022-11-03 02:44:12,572 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 92.3MB. Free memory was 66.3MB in the beginning and 66.2MB in the end (delta: 47.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:44:12,573 INFO L158 Benchmark]: CACSL2BoogieTranslator took 668.26ms. Allocated memory is still 92.3MB. Free memory was 69.5MB in the beginning and 52.6MB in the end (delta: 16.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-03 02:44:12,573 INFO L158 Benchmark]: Boogie Procedure Inliner took 196.38ms. Allocated memory is still 92.3MB. Free memory was 52.4MB in the beginning and 37.3MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-03 02:44:12,574 INFO L158 Benchmark]: Boogie Preprocessor took 253.75ms. Allocated memory was 92.3MB in the beginning and 115.3MB in the end (delta: 23.1MB). Free memory was 37.3MB in the beginning and 77.6MB in the end (delta: -40.3MB). Peak memory consumption was 18.6MB. Max. memory is 16.1GB. [2022-11-03 02:44:12,575 INFO L158 Benchmark]: RCFGBuilder took 6761.25ms. Allocated memory was 115.3MB in the beginning and 587.2MB in the end (delta: 471.9MB). Free memory was 77.6MB in the beginning and 402.9MB in the end (delta: -325.4MB). Peak memory consumption was 182.3MB. Max. memory is 16.1GB. [2022-11-03 02:44:12,576 INFO L158 Benchmark]: TraceAbstraction took 50792.10ms. Allocated memory was 587.2MB in the beginning and 1.9GB in the end (delta: 1.3GB). Free memory was 402.9MB in the beginning and 1.7GB in the end (delta: -1.3GB). Peak memory consumption was 992.7MB. Max. memory is 16.1GB. [2022-11-03 02:44:12,577 INFO L158 Benchmark]: Witness Printer took 5.53ms. Allocated memory is still 1.9GB. Free memory was 1.7GB in the beginning and 1.7GB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:44:12,580 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 92.3MB. Free memory was 66.3MB in the beginning and 66.2MB in the end (delta: 47.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 668.26ms. Allocated memory is still 92.3MB. Free memory was 69.5MB in the beginning and 52.6MB in the end (delta: 16.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 196.38ms. Allocated memory is still 92.3MB. Free memory was 52.4MB in the beginning and 37.3MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 253.75ms. Allocated memory was 92.3MB in the beginning and 115.3MB in the end (delta: 23.1MB). Free memory was 37.3MB in the beginning and 77.6MB in the end (delta: -40.3MB). Peak memory consumption was 18.6MB. Max. memory is 16.1GB. * RCFGBuilder took 6761.25ms. Allocated memory was 115.3MB in the beginning and 587.2MB in the end (delta: 471.9MB). Free memory was 77.6MB in the beginning and 402.9MB in the end (delta: -325.4MB). Peak memory consumption was 182.3MB. Max. memory is 16.1GB. * TraceAbstraction took 50792.10ms. Allocated memory was 587.2MB in the beginning and 1.9GB in the end (delta: 1.3GB). Free memory was 402.9MB in the beginning and 1.7GB in the end (delta: -1.3GB). Peak memory consumption was 992.7MB. Max. memory is 16.1GB. * Witness Printer took 5.53ms. Allocated memory is still 1.9GB. Free memory was 1.7GB in the beginning and 1.7GB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 187, overapproximation of shiftRight at line 191, overapproximation of bitwiseAnd at line 100, overapproximation of bitwiseComplement at line 132. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_2 mask_SORT_2 = (SORT_2)-1 >> (sizeof(SORT_2) * 8 - 5); [L29] const SORT_2 msb_SORT_2 = (SORT_2)1 << (5 - 1); [L31] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 16); [L32] const SORT_3 msb_SORT_3 = (SORT_3)1 << (16 - 1); [L34] const SORT_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 32); [L35] const SORT_4 msb_SORT_4 = (SORT_4)1 << (32 - 1); [L37] const SORT_3 var_5 = 0; [L38] const SORT_1 var_12 = 0; [L39] const SORT_3 var_34 = 1; [L40] const SORT_3 var_37 = 0; [L41] const SORT_1 var_62 = 1; [L42] const SORT_4 var_65 = 200; [L43] const SORT_3 var_66 = 0; [L44] const SORT_4 var_68 = 16; [L45] const SORT_4 var_171 = 500; [L47] SORT_3 input_44; [L48] SORT_3 input_46; [L49] SORT_3 input_48; [L50] SORT_1 input_50; [L51] SORT_1 input_52; [L52] SORT_1 input_54; [L53] SORT_1 input_56; [L54] SORT_1 input_58; [L55] SORT_1 input_60; [L56] SORT_1 input_64; [L57] SORT_1 input_74; [L58] SORT_1 input_78; [L59] SORT_1 input_81; [L60] SORT_1 input_96; [L61] SORT_1 input_100; [L63] SORT_3 state_6 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L64] SORT_3 state_8 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L65] SORT_3 state_10 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L66] SORT_1 state_13 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L67] SORT_1 state_15 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L68] SORT_1 state_17 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L69] SORT_1 state_19 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L70] SORT_1 state_21 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L71] SORT_1 state_23 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L72] SORT_1 state_25 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L73] SORT_1 state_27 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L75] SORT_3 init_7_arg_1 = var_5; [L76] state_6 = init_7_arg_1 [L77] SORT_3 init_9_arg_1 = var_5; [L78] state_8 = init_9_arg_1 [L79] SORT_3 init_11_arg_1 = var_5; [L80] state_10 = init_11_arg_1 [L81] SORT_1 init_14_arg_1 = var_12; [L82] state_13 = init_14_arg_1 [L83] SORT_1 init_16_arg_1 = var_12; [L84] state_15 = init_16_arg_1 [L85] SORT_1 init_18_arg_1 = var_12; [L86] state_17 = init_18_arg_1 [L87] SORT_1 init_20_arg_1 = var_12; [L88] state_19 = init_20_arg_1 [L89] SORT_1 init_22_arg_1 = var_12; [L90] state_21 = init_22_arg_1 [L91] SORT_1 init_24_arg_1 = var_12; [L92] state_23 = init_24_arg_1 [L93] SORT_1 init_26_arg_1 = var_12; [L94] state_25 = init_26_arg_1 [L95] SORT_1 init_28_arg_1 = var_12; [L96] state_27 = init_28_arg_1 VAL [init_11_arg_1=0, init_14_arg_1=0, init_16_arg_1=0, init_18_arg_1=0, init_20_arg_1=0, init_22_arg_1=0, init_24_arg_1=0, init_26_arg_1=0, init_28_arg_1=0, init_7_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_2=31, mask_SORT_3=65535, mask_SORT_4=4294967295, msb_SORT_1=1, msb_SORT_2=16, msb_SORT_3=32768, msb_SORT_4=2147483648, state_10=0, state_13=0, state_15=0, state_17=0, state_19=0, state_21=0, state_23=0, state_25=0, state_27=0, state_6=0, state_8=0, var_12=0, var_171=500, var_34=1, var_37=0, var_5=0, var_62=1, var_65=200, var_66=0, var_68=16] [L99] input_44 = __VERIFIER_nondet_ushort() [L100] input_44 = input_44 & mask_SORT_3 [L101] input_46 = __VERIFIER_nondet_ushort() [L102] input_46 = input_46 & mask_SORT_3 [L103] input_48 = __VERIFIER_nondet_ushort() [L104] input_48 = input_48 & mask_SORT_3 [L105] input_50 = __VERIFIER_nondet_uchar() [L106] input_50 = input_50 & mask_SORT_1 [L107] input_52 = __VERIFIER_nondet_uchar() [L108] input_52 = input_52 & mask_SORT_1 [L109] input_54 = __VERIFIER_nondet_uchar() [L110] input_54 = input_54 & mask_SORT_1 [L111] input_56 = __VERIFIER_nondet_uchar() [L112] input_56 = input_56 & mask_SORT_1 [L113] input_58 = __VERIFIER_nondet_uchar() [L114] input_58 = input_58 & mask_SORT_1 [L115] input_60 = __VERIFIER_nondet_uchar() [L116] input_60 = input_60 & mask_SORT_1 [L117] input_64 = __VERIFIER_nondet_uchar() [L118] input_64 = input_64 & mask_SORT_1 [L119] input_74 = __VERIFIER_nondet_uchar() [L120] input_74 = input_74 & mask_SORT_1 [L121] input_78 = __VERIFIER_nondet_uchar() [L122] input_78 = input_78 & mask_SORT_1 [L123] input_81 = __VERIFIER_nondet_uchar() [L124] input_81 = input_81 & mask_SORT_1 [L125] input_96 = __VERIFIER_nondet_uchar() [L126] input_96 = input_96 & mask_SORT_1 [L127] input_100 = __VERIFIER_nondet_uchar() [L128] input_100 = input_100 & mask_SORT_1 [L131] SORT_1 var_29_arg_0 = state_13; [L132] SORT_1 var_29_arg_1 = ~state_15; [L133] var_29_arg_1 = var_29_arg_1 & mask_SORT_1 [L134] SORT_1 var_29 = var_29_arg_0 & var_29_arg_1; [L135] SORT_1 var_30_arg_0 = var_29; [L136] SORT_1 var_30_arg_1 = ~state_17; [L137] var_30_arg_1 = var_30_arg_1 & mask_SORT_1 [L138] SORT_1 var_30 = var_30_arg_0 & var_30_arg_1; [L139] SORT_1 var_31_arg_0 = var_30; [L140] SORT_1 var_31_arg_1 = state_19; [L141] SORT_1 var_31 = var_31_arg_0 & var_31_arg_1; [L142] SORT_1 var_32_arg_0 = var_31; [L143] SORT_1 var_32_arg_1 = ~state_21; [L144] var_32_arg_1 = var_32_arg_1 & mask_SORT_1 [L145] SORT_1 var_32 = var_32_arg_0 & var_32_arg_1; [L146] SORT_1 var_33_arg_0 = var_32; [L147] SORT_1 var_33_arg_1 = ~state_23; [L148] var_33_arg_1 = var_33_arg_1 & mask_SORT_1 [L149] SORT_1 var_33 = var_33_arg_0 & var_33_arg_1; [L150] SORT_3 var_35_arg_0 = var_34; [L151] SORT_3 var_35_arg_1 = state_6; [L152] SORT_1 var_35 = var_35_arg_0 == var_35_arg_1; [L153] SORT_1 var_36_arg_0 = var_33; [L154] SORT_1 var_36_arg_1 = var_35; [L155] SORT_1 var_36 = var_36_arg_0 & var_36_arg_1; [L156] SORT_3 var_38_arg_0 = var_37; [L157] SORT_3 var_38_arg_1 = state_8; [L158] SORT_1 var_38 = var_38_arg_0 == var_38_arg_1; [L159] SORT_1 var_39_arg_0 = var_36; [L160] SORT_1 var_39_arg_1 = var_38; [L161] SORT_1 var_39 = var_39_arg_0 & var_39_arg_1; [L162] SORT_3 var_40_arg_0 = var_37; [L163] SORT_3 var_40_arg_1 = state_10; [L164] SORT_1 var_40 = var_40_arg_0 == var_40_arg_1; [L165] SORT_1 var_41_arg_0 = var_39; [L166] SORT_1 var_41_arg_1 = var_40; [L167] SORT_1 var_41 = var_41_arg_0 & var_41_arg_1; [L168] SORT_1 var_42_arg_0 = state_27; [L169] SORT_1 var_42_arg_1 = var_41; [L170] SORT_1 var_42 = var_42_arg_0 & var_42_arg_1; [L171] var_42 = var_42 & mask_SORT_1 [L172] SORT_1 bad_43_arg_0 = var_42; [L173] CALL __VERIFIER_assert(!(bad_43_arg_0)) [L20] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L173] RET __VERIFIER_assert(!(bad_43_arg_0)) [L175] SORT_3 next_45_arg_1 = input_44; [L176] SORT_3 next_47_arg_1 = input_46; [L177] SORT_3 next_49_arg_1 = input_48; [L178] SORT_1 next_51_arg_1 = input_50; [L179] SORT_1 next_53_arg_1 = input_52; [L180] SORT_1 next_55_arg_1 = input_54; [L181] SORT_1 next_57_arg_1 = input_56; [L182] SORT_1 next_59_arg_1 = input_58; [L183] SORT_1 next_61_arg_1 = input_60; [L184] SORT_1 next_63_arg_1 = var_62; [L185] SORT_3 var_67_arg_0 = input_44; [L186] SORT_3 var_67_arg_1 = var_66; [L187] SORT_4 var_67 = ((SORT_4)var_67_arg_0 << 16) | var_67_arg_1; [L188] SORT_4 var_69_arg_0 = var_67; [L189] EXPR (var_69_arg_0 & msb_SORT_4) ? (var_69_arg_0 | ~mask_SORT_4) : (var_69_arg_0 & mask_SORT_4) [L189] var_69_arg_0 = (var_69_arg_0 & msb_SORT_4) ? (var_69_arg_0 | ~mask_SORT_4) : (var_69_arg_0 & mask_SORT_4) [L190] SORT_4 var_69_arg_1 = var_68; [L191] SORT_4 var_69 = (int)var_69_arg_0 >> var_69_arg_1; [L192] EXPR (var_69_arg_0 & msb_SORT_4) ? (var_69 | ~(mask_SORT_4 >> var_69_arg_1)) : var_69 [L192] var_69 = (var_69_arg_0 & msb_SORT_4) ? (var_69 | ~(mask_SORT_4 >> var_69_arg_1)) : var_69 [L193] var_69 = var_69 & mask_SORT_4 [L194] SORT_4 var_70_arg_0 = var_65; [L195] SORT_4 var_70_arg_1 = var_69; [L196] SORT_1 var_70 = var_70_arg_0 <= var_70_arg_1; [L197] SORT_1 var_71_arg_0 = input_50; [L198] SORT_1 var_71_arg_1 = ~var_70; [L199] var_71_arg_1 = var_71_arg_1 & mask_SORT_1 [L200] SORT_1 var_71 = var_71_arg_0 & var_71_arg_1; [L201] SORT_1 var_72_arg_0 = ~input_64; [L202] var_72_arg_0 = var_72_arg_0 & mask_SORT_1 [L203] SORT_1 var_72_arg_1 = var_71; [L204] SORT_1 var_72 = var_72_arg_0 | var_72_arg_1; [L205] SORT_1 var_73_arg_0 = input_52; [L206] SORT_1 var_73_arg_1 = input_64; [L207] SORT_1 var_73 = var_73_arg_0 | var_73_arg_1; [L208] SORT_1 var_75_arg_0 = var_73; [L209] SORT_1 var_75_arg_1 = ~input_74; [L210] var_75_arg_1 = var_75_arg_1 & mask_SORT_1 [L211] SORT_1 var_75 = var_75_arg_0 | var_75_arg_1; [L212] SORT_1 var_76_arg_0 = var_72; [L213] SORT_1 var_76_arg_1 = var_75; [L214] SORT_1 var_76 = var_76_arg_0 & var_76_arg_1; [L215] SORT_1 var_77_arg_0 = input_54; [L216] SORT_1 var_77_arg_1 = input_74; [L217] SORT_1 var_77 = var_77_arg_0 | var_77_arg_1; [L218] SORT_1 var_79_arg_0 = var_77; [L219] SORT_1 var_79_arg_1 = ~input_78; [L220] var_79_arg_1 = var_79_arg_1 & mask_SORT_1 [L221] SORT_1 var_79 = var_79_arg_0 | var_79_arg_1; [L222] SORT_1 var_80_arg_0 = var_76; [L223] SORT_1 var_80_arg_1 = var_79; [L224] SORT_1 var_80 = var_80_arg_0 & var_80_arg_1; [L225] SORT_1 var_82_arg_0 = input_64; [L226] SORT_3 var_82_arg_1 = input_44; [L227] SORT_3 var_82_arg_2 = input_46; [L228] EXPR var_82_arg_0 ? var_82_arg_1 : var_82_arg_2 [L228] SORT_3 var_82 = var_82_arg_0 ? var_82_arg_1 : var_82_arg_2; [L229] SORT_3 var_83_arg_0 = var_82; [L230] SORT_3 var_83_arg_1 = var_66; [L231] SORT_4 var_83 = ((SORT_4)var_83_arg_0 << 16) | var_83_arg_1; [L232] SORT_4 var_84_arg_0 = var_83; [L233] EXPR (var_84_arg_0 & msb_SORT_4) ? (var_84_arg_0 | ~mask_SORT_4) : (var_84_arg_0 & mask_SORT_4) [L233] var_84_arg_0 = (var_84_arg_0 & msb_SORT_4) ? (var_84_arg_0 | ~mask_SORT_4) : (var_84_arg_0 & mask_SORT_4) [L234] SORT_4 var_84_arg_1 = var_68; [L235] SORT_4 var_84 = (int)var_84_arg_0 >> var_84_arg_1; [L236] EXPR (var_84_arg_0 & msb_SORT_4) ? (var_84 | ~(mask_SORT_4 >> var_84_arg_1)) : var_84 [L236] var_84 = (var_84_arg_0 & msb_SORT_4) ? (var_84 | ~(mask_SORT_4 >> var_84_arg_1)) : var_84 [L237] SORT_4 var_85_arg_0 = var_69; [L238] SORT_4 var_85_arg_1 = var_84; [L239] SORT_4 var_85 = var_85_arg_0 + var_85_arg_1; [L240] SORT_4 var_86_arg_0 = var_85; [L241] SORT_3 var_86 = var_86_arg_0 >> 0; [L242] SORT_1 var_87_arg_0 = input_74; [L243] SORT_3 var_87_arg_1 = var_86; [L244] SORT_3 var_87_arg_2 = var_82; [L245] EXPR var_87_arg_0 ? var_87_arg_1 : var_87_arg_2 [L245] SORT_3 var_87 = var_87_arg_0 ? var_87_arg_1 : var_87_arg_2; [L246] var_87 = var_87 & mask_SORT_3 [L247] SORT_1 var_88_arg_0 = input_78; [L248] SORT_3 var_88_arg_1 = var_87; [L249] SORT_3 var_88_arg_2 = input_44; [L250] EXPR var_88_arg_0 ? var_88_arg_1 : var_88_arg_2 [L250] SORT_3 var_88 = var_88_arg_0 ? var_88_arg_1 : var_88_arg_2; [L251] SORT_3 var_89_arg_0 = var_88; [L252] SORT_3 var_89_arg_1 = var_66; [L253] SORT_4 var_89 = ((SORT_4)var_89_arg_0 << 16) | var_89_arg_1; [L254] SORT_4 var_90_arg_0 = var_89; [L255] EXPR (var_90_arg_0 & msb_SORT_4) ? (var_90_arg_0 | ~mask_SORT_4) : (var_90_arg_0 & mask_SORT_4) [L255] var_90_arg_0 = (var_90_arg_0 & msb_SORT_4) ? (var_90_arg_0 | ~mask_SORT_4) : (var_90_arg_0 & mask_SORT_4) [L256] SORT_4 var_90_arg_1 = var_68; [L257] SORT_4 var_90 = (int)var_90_arg_0 >> var_90_arg_1; [L258] EXPR (var_90_arg_0 & msb_SORT_4) ? (var_90 | ~(mask_SORT_4 >> var_90_arg_1)) : var_90 [L258] var_90 = (var_90_arg_0 & msb_SORT_4) ? (var_90 | ~(mask_SORT_4 >> var_90_arg_1)) : var_90 [L259] var_90 = var_90 & mask_SORT_4 [L260] SORT_4 var_91_arg_0 = var_65; [L261] SORT_4 var_91_arg_1 = var_90; [L262] SORT_1 var_91 = var_91_arg_0 <= var_91_arg_1; [L263] SORT_1 var_92_arg_0 = input_56; [L264] SORT_1 var_92_arg_1 = ~var_91; [L265] var_92_arg_1 = var_92_arg_1 & mask_SORT_1 [L266] SORT_1 var_92 = var_92_arg_0 & var_92_arg_1; [L267] SORT_1 var_93_arg_0 = ~input_81; [L268] var_93_arg_0 = var_93_arg_0 & mask_SORT_1 [L269] SORT_1 var_93_arg_1 = var_92; [L270] SORT_1 var_93 = var_93_arg_0 | var_93_arg_1; [L271] SORT_1 var_94_arg_0 = var_80; [L272] SORT_1 var_94_arg_1 = var_93; [L273] SORT_1 var_94 = var_94_arg_0 & var_94_arg_1; [L274] SORT_1 var_95_arg_0 = input_58; [L275] SORT_1 var_95_arg_1 = input_81; [L276] SORT_1 var_95 = var_95_arg_0 | var_95_arg_1; [L277] SORT_1 var_97_arg_0 = var_95; [L278] SORT_1 var_97_arg_1 = ~input_96; [L279] var_97_arg_1 = var_97_arg_1 & mask_SORT_1 [L280] SORT_1 var_97 = var_97_arg_0 | var_97_arg_1; [L281] SORT_1 var_98_arg_0 = var_94; [L282] SORT_1 var_98_arg_1 = var_97; [L283] SORT_1 var_98 = var_98_arg_0 & var_98_arg_1; [L284] SORT_1 var_99_arg_0 = input_60; [L285] SORT_1 var_99_arg_1 = input_96; [L286] SORT_1 var_99 = var_99_arg_0 | var_99_arg_1; [L287] SORT_1 var_101_arg_0 = var_99; [L288] SORT_1 var_101_arg_1 = ~input_100; [L289] var_101_arg_1 = var_101_arg_1 & mask_SORT_1 [L290] SORT_1 var_101 = var_101_arg_0 | var_101_arg_1; [L291] SORT_1 var_102_arg_0 = var_98; [L292] SORT_1 var_102_arg_1 = var_101; [L293] SORT_1 var_102 = var_102_arg_0 & var_102_arg_1; [L294] SORT_1 var_103_arg_0 = input_64; [L295] SORT_1 var_103_arg_1 = input_74; [L296] SORT_1 var_103 = var_103_arg_0 | var_103_arg_1; [L297] SORT_1 var_104_arg_0 = input_78; [L298] SORT_1 var_104_arg_1 = var_103; [L299] SORT_1 var_104 = var_104_arg_0 | var_104_arg_1; [L300] SORT_1 var_105_arg_0 = input_81; [L301] SORT_1 var_105_arg_1 = var_104; [L302] SORT_1 var_105 = var_105_arg_0 | var_105_arg_1; [L303] SORT_1 var_106_arg_0 = input_96; [L304] SORT_1 var_106_arg_1 = var_105; [L305] SORT_1 var_106 = var_106_arg_0 | var_106_arg_1; [L306] SORT_1 var_107_arg_0 = input_100; [L307] SORT_1 var_107_arg_1 = var_106; [L308] SORT_1 var_107 = var_107_arg_0 | var_107_arg_1; [L309] SORT_1 var_108_arg_0 = var_102; [L310] SORT_1 var_108_arg_1 = var_107; [L311] SORT_1 var_108 = var_108_arg_0 & var_108_arg_1; [L312] SORT_1 var_109_arg_0 = input_50; [L313] SORT_1 var_109_arg_1 = input_52; [L314] SORT_1 var_109 = var_109_arg_0 & var_109_arg_1; [L315] SORT_1 var_110_arg_0 = input_50; [L316] SORT_1 var_110_arg_1 = input_52; [L317] SORT_1 var_110 = var_110_arg_0 | var_110_arg_1; [L318] SORT_1 var_111_arg_0 = input_54; [L319] SORT_1 var_111_arg_1 = var_110; [L320] SORT_1 var_111 = var_111_arg_0 & var_111_arg_1; [L321] SORT_1 var_112_arg_0 = var_109; [L322] SORT_1 var_112_arg_1 = var_111; [L323] SORT_1 var_112 = var_112_arg_0 | var_112_arg_1; [L324] SORT_1 var_113_arg_0 = input_54; [L325] SORT_1 var_113_arg_1 = var_110; [L326] SORT_1 var_113 = var_113_arg_0 | var_113_arg_1; [L327] SORT_1 var_114_arg_0 = ~var_112; [L328] var_114_arg_0 = var_114_arg_0 & mask_SORT_1 [L329] SORT_1 var_114_arg_1 = var_113; [L330] SORT_1 var_114 = var_114_arg_0 & var_114_arg_1; [L331] SORT_1 var_115_arg_0 = input_56; [L332] SORT_1 var_115_arg_1 = input_58; [L333] SORT_1 var_115 = var_115_arg_0 & var_115_arg_1; [L334] SORT_1 var_116_arg_0 = input_56; [L335] SORT_1 var_116_arg_1 = input_58; [L336] SORT_1 var_116 = var_116_arg_0 | var_116_arg_1; [L337] SORT_1 var_117_arg_0 = input_60; [L338] SORT_1 var_117_arg_1 = var_116; [L339] SORT_1 var_117 = var_117_arg_0 & var_117_arg_1; [L340] SORT_1 var_118_arg_0 = var_115; [L341] SORT_1 var_118_arg_1 = var_117; [L342] SORT_1 var_118 = var_118_arg_0 | var_118_arg_1; [L343] SORT_1 var_119_arg_0 = var_114; [L344] SORT_1 var_119_arg_1 = ~var_118; [L345] var_119_arg_1 = var_119_arg_1 & mask_SORT_1 [L346] SORT_1 var_119 = var_119_arg_0 & var_119_arg_1; [L347] SORT_1 var_120_arg_0 = input_60; [L348] SORT_1 var_120_arg_1 = var_116; [L349] SORT_1 var_120 = var_120_arg_0 | var_120_arg_1; [L350] SORT_1 var_121_arg_0 = var_119; [L351] SORT_1 var_121_arg_1 = var_120; [L352] SORT_1 var_121 = var_121_arg_0 & var_121_arg_1; [L353] SORT_1 var_122_arg_0 = var_108; [L354] SORT_1 var_122_arg_1 = var_121; [L355] SORT_1 var_122 = var_122_arg_0 & var_122_arg_1; [L356] SORT_1 var_123_arg_0 = var_73; [L357] SORT_1 var_123_arg_1 = ~input_74; [L358] var_123_arg_1 = var_123_arg_1 & mask_SORT_1 [L359] SORT_1 var_123 = var_123_arg_0 & var_123_arg_1; [L360] var_123 = var_123 & mask_SORT_1 [L361] SORT_1 var_124_arg_0 = input_50; [L362] SORT_1 var_124_arg_1 = ~input_64; [L363] var_124_arg_1 = var_124_arg_1 & mask_SORT_1 [L364] SORT_1 var_124 = var_124_arg_0 & var_124_arg_1; [L365] SORT_1 var_125_arg_0 = var_124; [L366] SORT_1 var_125_arg_1 = input_78; [L367] SORT_1 var_125 = var_125_arg_0 | var_125_arg_1; [L368] var_125 = var_125 & mask_SORT_1 [L369] SORT_1 var_126_arg_0 = var_123; [L370] SORT_1 var_126_arg_1 = var_125; [L371] SORT_1 var_126 = var_126_arg_0 & var_126_arg_1; [L372] SORT_1 var_127_arg_0 = var_77; [L373] SORT_1 var_127_arg_1 = ~input_78; [L374] var_127_arg_1 = var_127_arg_1 & mask_SORT_1 [L375] SORT_1 var_127 = var_127_arg_0 & var_127_arg_1; [L376] var_127 = var_127 & mask_SORT_1 [L377] SORT_1 var_128_arg_0 = var_123; [L378] SORT_1 var_128_arg_1 = var_125; [L379] SORT_1 var_128 = var_128_arg_0 | var_128_arg_1; [L380] SORT_1 var_129_arg_0 = var_127; [L381] SORT_1 var_129_arg_1 = var_128; [L382] SORT_1 var_129 = var_129_arg_0 & var_129_arg_1; [L383] SORT_1 var_130_arg_0 = var_126; [L384] SORT_1 var_130_arg_1 = var_129; [L385] SORT_1 var_130 = var_130_arg_0 | var_130_arg_1; [L386] SORT_1 var_131_arg_0 = var_127; [L387] SORT_1 var_131_arg_1 = var_128; [L388] SORT_1 var_131 = var_131_arg_0 | var_131_arg_1; [L389] SORT_1 var_132_arg_0 = ~var_130; [L390] var_132_arg_0 = var_132_arg_0 & mask_SORT_1 [L391] SORT_1 var_132_arg_1 = var_131; [L392] SORT_1 var_132 = var_132_arg_0 & var_132_arg_1; [L393] SORT_1 var_133_arg_0 = var_95; [L394] SORT_1 var_133_arg_1 = ~input_96; [L395] var_133_arg_1 = var_133_arg_1 & mask_SORT_1 [L396] SORT_1 var_133 = var_133_arg_0 & var_133_arg_1; [L397] var_133 = var_133 & mask_SORT_1 [L398] SORT_1 var_134_arg_0 = input_56; [L399] SORT_1 var_134_arg_1 = ~input_81; [L400] var_134_arg_1 = var_134_arg_1 & mask_SORT_1 [L401] SORT_1 var_134 = var_134_arg_0 & var_134_arg_1; [L402] SORT_1 var_135_arg_0 = var_134; [L403] SORT_1 var_135_arg_1 = input_100; [L404] SORT_1 var_135 = var_135_arg_0 | var_135_arg_1; [L405] var_135 = var_135 & mask_SORT_1 [L406] SORT_1 var_136_arg_0 = var_133; [L407] SORT_1 var_136_arg_1 = var_135; [L408] SORT_1 var_136 = var_136_arg_0 & var_136_arg_1; [L409] SORT_1 var_137_arg_0 = var_99; [L410] SORT_1 var_137_arg_1 = ~input_100; [L411] var_137_arg_1 = var_137_arg_1 & mask_SORT_1 [L412] SORT_1 var_137 = var_137_arg_0 & var_137_arg_1; [L413] var_137 = var_137 & mask_SORT_1 [L414] SORT_1 var_138_arg_0 = var_133; [L415] SORT_1 var_138_arg_1 = var_135; [L416] SORT_1 var_138 = var_138_arg_0 | var_138_arg_1; [L417] SORT_1 var_139_arg_0 = var_137; [L418] SORT_1 var_139_arg_1 = var_138; [L419] SORT_1 var_139 = var_139_arg_0 & var_139_arg_1; [L420] SORT_1 var_140_arg_0 = var_136; [L421] SORT_1 var_140_arg_1 = var_139; [L422] SORT_1 var_140 = var_140_arg_0 | var_140_arg_1; [L423] SORT_1 var_141_arg_0 = var_132; [L424] SORT_1 var_141_arg_1 = ~var_140; [L425] var_141_arg_1 = var_141_arg_1 & mask_SORT_1 [L426] SORT_1 var_141 = var_141_arg_0 & var_141_arg_1; [L427] SORT_1 var_142_arg_0 = var_137; [L428] SORT_1 var_142_arg_1 = var_138; [L429] SORT_1 var_142 = var_142_arg_0 | var_142_arg_1; [L430] SORT_1 var_143_arg_0 = var_141; [L431] SORT_1 var_143_arg_1 = var_142; [L432] SORT_1 var_143 = var_143_arg_0 & var_143_arg_1; [L433] SORT_1 var_144_arg_0 = var_122; [L434] SORT_1 var_144_arg_1 = var_143; [L435] SORT_1 var_144 = var_144_arg_0 & var_144_arg_1; [L436] SORT_1 var_145_arg_0 = input_81; [L437] SORT_3 var_145_arg_1 = var_88; [L438] SORT_3 var_145_arg_2 = input_48; [L439] EXPR var_145_arg_0 ? var_145_arg_1 : var_145_arg_2 [L439] SORT_3 var_145 = var_145_arg_0 ? var_145_arg_1 : var_145_arg_2; [L440] SORT_3 var_146_arg_0 = var_145; [L441] SORT_3 var_146_arg_1 = var_66; [L442] SORT_4 var_146 = ((SORT_4)var_146_arg_0 << 16) | var_146_arg_1; [L443] SORT_4 var_147_arg_0 = var_146; [L444] EXPR (var_147_arg_0 & msb_SORT_4) ? (var_147_arg_0 | ~mask_SORT_4) : (var_147_arg_0 & mask_SORT_4) [L444] var_147_arg_0 = (var_147_arg_0 & msb_SORT_4) ? (var_147_arg_0 | ~mask_SORT_4) : (var_147_arg_0 & mask_SORT_4) [L445] SORT_4 var_147_arg_1 = var_68; [L446] SORT_4 var_147 = (int)var_147_arg_0 >> var_147_arg_1; [L447] EXPR (var_147_arg_0 & msb_SORT_4) ? (var_147 | ~(mask_SORT_4 >> var_147_arg_1)) : var_147 [L447] var_147 = (var_147_arg_0 & msb_SORT_4) ? (var_147 | ~(mask_SORT_4 >> var_147_arg_1)) : var_147 [L448] SORT_4 var_148_arg_0 = var_90; [L449] SORT_4 var_148_arg_1 = var_147; [L450] SORT_4 var_148 = var_148_arg_0 + var_148_arg_1; [L451] SORT_4 var_149_arg_0 = var_148; [L452] SORT_3 var_149 = var_149_arg_0 >> 0; [L453] SORT_1 var_150_arg_0 = input_96; [L454] SORT_3 var_150_arg_1 = var_149; [L455] SORT_3 var_150_arg_2 = var_145; [L456] EXPR var_150_arg_0 ? var_150_arg_1 : var_150_arg_2 [L456] SORT_3 var_150 = var_150_arg_0 ? var_150_arg_1 : var_150_arg_2; [L457] var_150 = var_150 & mask_SORT_3 [L458] SORT_1 var_151_arg_0 = input_100; [L459] SORT_3 var_151_arg_1 = var_150; [L460] SORT_3 var_151_arg_2 = var_88; [L461] EXPR var_151_arg_0 ? var_151_arg_1 : var_151_arg_2 [L461] SORT_3 var_151 = var_151_arg_0 ? var_151_arg_1 : var_151_arg_2; [L462] var_151 = var_151 & mask_SORT_3 [L463] SORT_3 var_152_arg_0 = var_151; [L464] SORT_3 var_152_arg_1 = state_6; [L465] SORT_1 var_152 = var_152_arg_0 == var_152_arg_1; [L466] SORT_1 var_153_arg_0 = var_144; [L467] SORT_1 var_153_arg_1 = var_152; [L468] SORT_1 var_153 = var_153_arg_0 & var_153_arg_1; [L469] SORT_3 var_154_arg_0 = var_87; [L470] SORT_3 var_154_arg_1 = state_8; [L471] SORT_1 var_154 = var_154_arg_0 == var_154_arg_1; [L472] SORT_1 var_155_arg_0 = var_153; [L473] SORT_1 var_155_arg_1 = var_154; [L474] SORT_1 var_155 = var_155_arg_0 & var_155_arg_1; [L475] SORT_3 var_156_arg_0 = var_150; [L476] SORT_3 var_156_arg_1 = state_10; [L477] SORT_1 var_156 = var_156_arg_0 == var_156_arg_1; [L478] SORT_1 var_157_arg_0 = var_155; [L479] SORT_1 var_157_arg_1 = var_156; [L480] SORT_1 var_157 = var_157_arg_0 & var_157_arg_1; [L481] SORT_1 var_158_arg_0 = var_125; [L482] SORT_1 var_158_arg_1 = state_13; [L483] SORT_1 var_158 = var_158_arg_0 == var_158_arg_1; [L484] SORT_1 var_159_arg_0 = var_157; [L485] SORT_1 var_159_arg_1 = var_158; [L486] SORT_1 var_159 = var_159_arg_0 & var_159_arg_1; [L487] SORT_1 var_160_arg_0 = var_123; [L488] SORT_1 var_160_arg_1 = state_15; [L489] SORT_1 var_160 = var_160_arg_0 == var_160_arg_1; [L490] SORT_1 var_161_arg_0 = var_159; [L491] SORT_1 var_161_arg_1 = var_160; [L492] SORT_1 var_161 = var_161_arg_0 & var_161_arg_1; [L493] SORT_1 var_162_arg_0 = var_127; [L494] SORT_1 var_162_arg_1 = state_17; [L495] SORT_1 var_162 = var_162_arg_0 == var_162_arg_1; [L496] SORT_1 var_163_arg_0 = var_161; [L497] SORT_1 var_163_arg_1 = var_162; [L498] SORT_1 var_163 = var_163_arg_0 & var_163_arg_1; [L499] SORT_1 var_164_arg_0 = var_135; [L500] SORT_1 var_164_arg_1 = state_19; [L501] SORT_1 var_164 = var_164_arg_0 == var_164_arg_1; [L502] SORT_1 var_165_arg_0 = var_163; [L503] SORT_1 var_165_arg_1 = var_164; [L504] SORT_1 var_165 = var_165_arg_0 & var_165_arg_1; [L505] SORT_1 var_166_arg_0 = var_133; [L506] SORT_1 var_166_arg_1 = state_21; [L507] SORT_1 var_166 = var_166_arg_0 == var_166_arg_1; [L508] SORT_1 var_167_arg_0 = var_165; [L509] SORT_1 var_167_arg_1 = var_166; [L510] SORT_1 var_167 = var_167_arg_0 & var_167_arg_1; [L511] SORT_1 var_168_arg_0 = var_137; [L512] SORT_1 var_168_arg_1 = state_23; [L513] SORT_1 var_168 = var_168_arg_0 == var_168_arg_1; [L514] SORT_1 var_169_arg_0 = var_167; [L515] SORT_1 var_169_arg_1 = var_168; [L516] SORT_1 var_169 = var_169_arg_0 & var_169_arg_1; [L517] SORT_1 var_170_arg_0 = var_169; [L518] SORT_1 var_170_arg_1 = state_27; [L519] SORT_1 var_170 = var_170_arg_0 & var_170_arg_1; [L520] SORT_4 var_172_arg_0 = var_171; [L521] SORT_4 var_172_arg_1 = var_69; [L522] SORT_1 var_172 = var_172_arg_0 == var_172_arg_1; [L523] SORT_1 var_173_arg_0 = state_25; [L524] SORT_1 var_173_arg_1 = var_170; [L525] SORT_1 var_173_arg_2 = var_172; [L526] EXPR var_173_arg_0 ? var_173_arg_1 : var_173_arg_2 [L526] SORT_1 var_173 = var_173_arg_0 ? var_173_arg_1 : var_173_arg_2; [L527] SORT_1 next_174_arg_1 = var_173; [L529] state_6 = next_45_arg_1 [L530] state_8 = next_47_arg_1 [L531] state_10 = next_49_arg_1 [L532] state_13 = next_51_arg_1 [L533] state_15 = next_53_arg_1 [L534] state_17 = next_55_arg_1 [L535] state_19 = next_57_arg_1 [L536] state_21 = next_59_arg_1 [L537] state_23 = next_61_arg_1 [L538] state_25 = next_63_arg_1 [L539] state_27 = next_174_arg_1 VAL [bad_43_arg_0=0, init_11_arg_1=0, init_14_arg_1=0, init_16_arg_1=0, init_18_arg_1=0, init_20_arg_1=0, init_22_arg_1=0, init_24_arg_1=0, init_26_arg_1=0, init_28_arg_1=0, init_7_arg_1=0, init_9_arg_1=0, input_100=1, input_44=1, input_46=0, input_48=0, input_50=1, input_52=0, input_54=1, input_56=1, input_58=1, input_60=0, input_64=0, input_74=1, input_78=1, input_81=1, input_96=1, mask_SORT_1=1, mask_SORT_2=31, mask_SORT_3=65535, mask_SORT_4=4294967295, msb_SORT_1=1, msb_SORT_2=16, msb_SORT_3=32768, msb_SORT_4=2147483648, next_174_arg_1=1, next_45_arg_1=1, next_47_arg_1=0, next_49_arg_1=0, next_51_arg_1=1, next_53_arg_1=0, next_55_arg_1=1, next_57_arg_1=1, next_59_arg_1=1, next_61_arg_1=0, next_63_arg_1=1, state_10=0, state_13=1, state_15=0, state_17=1, state_19=1, state_21=1, state_23=0, state_25=1, state_27=1, state_6=1, state_8=0, var_101=1, var_101_arg_0=1, var_101_arg_1=0, var_102=0, var_102_arg_0=0, var_102_arg_1=1, var_103=1, var_103_arg_0=0, var_103_arg_1=1, var_104=1, var_104_arg_0=1, var_104_arg_1=1, var_105=1, var_105_arg_0=1, var_105_arg_1=1, var_106=1, var_106_arg_0=1, var_106_arg_1=1, var_107=1, var_107_arg_0=1, var_107_arg_1=1, var_108=0, var_108_arg_0=0, var_108_arg_1=1, var_109=0, var_109_arg_0=1, var_109_arg_1=0, var_110=1, var_110_arg_0=1, var_110_arg_1=0, var_111=1, var_111_arg_0=1, var_111_arg_1=1, var_112=1, var_112_arg_0=0, var_112_arg_1=1, var_113=1, var_113_arg_0=1, var_113_arg_1=1, var_114=0, var_114_arg_0=0, var_114_arg_1=1, var_115=1, var_115_arg_0=1, var_115_arg_1=1, var_116=1, var_116_arg_0=1, var_116_arg_1=1, var_117=0, var_117_arg_0=0, var_117_arg_1=1, var_118=1, var_118_arg_0=1, var_118_arg_1=0, var_119=0, var_119_arg_0=0, var_119_arg_1=1, var_12=0, var_120=1, var_120_arg_0=0, var_120_arg_1=1, var_121=0, var_121_arg_0=0, var_121_arg_1=1, var_122=0, var_122_arg_0=0, var_122_arg_1=0, var_123=0, var_123_arg_0=0, var_123_arg_1=0, var_124=1, var_124_arg_0=1, var_124_arg_1=1, var_125=1, var_125_arg_0=1, var_125_arg_1=1, var_126=0, var_126_arg_0=0, var_126_arg_1=1, var_127=0, var_127_arg_0=1, var_127_arg_1=0, var_128=1, var_128_arg_0=0, var_128_arg_1=1, var_129=0, var_129_arg_0=0, var_129_arg_1=1, var_130=0, var_130_arg_0=0, var_130_arg_1=0, var_131=1, var_131_arg_0=0, var_131_arg_1=1, var_132=0, var_132_arg_0=0, var_132_arg_1=1, var_133=1, var_133_arg_0=1, var_133_arg_1=1, var_134=1, var_134_arg_0=1, var_134_arg_1=1, var_135=1, var_135_arg_0=1, var_135_arg_1=1, var_136=1, var_136_arg_0=1, var_136_arg_1=1, var_137=0, var_137_arg_0=1, var_137_arg_1=0, var_138=1, var_138_arg_0=1, var_138_arg_1=1, var_139=0, var_139_arg_0=0, var_139_arg_1=1, var_140=1, var_140_arg_0=1, var_140_arg_1=0, var_141=0, var_141_arg_0=0, var_141_arg_1=0, var_142=1, var_142_arg_0=0, var_142_arg_1=1, var_143=0, var_143_arg_0=0, var_143_arg_1=1, var_144=0, var_144_arg_0=0, var_144_arg_1=0, var_145=0, var_145_arg_0=1, var_145_arg_1=0, var_145_arg_2=0, var_146=0, var_146_arg_0=0, var_146_arg_1=0, var_147=4294967294, var_147_arg_0=0, var_147_arg_1=16, var_148=4294967294, var_148_arg_0=0, var_148_arg_1=4294967294, var_149=65534, var_149_arg_0=4294967294, var_150=1, var_150_arg_0=1, var_150_arg_1=65534, var_150_arg_2=0, var_151=1, var_151_arg_0=1, var_151_arg_1=1, var_151_arg_2=0, var_152=0, var_152_arg_0=1, var_152_arg_1=0, var_153=0, var_153_arg_0=0, var_153_arg_1=0, var_154=1, var_154_arg_0=0, var_154_arg_1=0, var_155=0, var_155_arg_0=0, var_155_arg_1=1, var_156=0, var_156_arg_0=1, var_156_arg_1=0, var_157=0, var_157_arg_0=0, var_157_arg_1=0, var_158=0, var_158_arg_0=1, var_158_arg_1=0, var_159=0, var_159_arg_0=0, var_159_arg_1=0, var_160=1, var_160_arg_0=0, var_160_arg_1=0, var_161=0, var_161_arg_0=0, var_161_arg_1=1, var_162=1, var_162_arg_0=0, var_162_arg_1=0, var_163=0, var_163_arg_0=0, var_163_arg_1=1, var_164=0, var_164_arg_0=1, var_164_arg_1=0, var_165=0, var_165_arg_0=0, var_165_arg_1=0, var_166=0, var_166_arg_0=1, var_166_arg_1=0, var_167=0, var_167_arg_0=0, var_167_arg_1=0, var_168=1, var_168_arg_0=0, var_168_arg_1=0, var_169=0, var_169_arg_0=0, var_169_arg_1=1, var_170=0, var_170_arg_0=0, var_170_arg_1=0, var_171=500, var_172=1, var_172_arg_0=500, var_172_arg_1=500, var_173=1, var_173_arg_0=0, var_173_arg_1=0, var_173_arg_2=1, var_29=0, var_29_arg_0=0, var_29_arg_1=0, var_30=0, var_30_arg_0=0, var_30_arg_1=0, var_31=0, var_31_arg_0=0, var_31_arg_1=0, var_32=0, var_32_arg_0=0, var_32_arg_1=1, var_33=0, var_33_arg_0=0, var_33_arg_1=0, var_34=1, var_35=0, var_35_arg_0=1, var_35_arg_1=0, var_36=0, var_36_arg_0=0, var_36_arg_1=0, var_37=0, var_38=1, var_38_arg_0=0, var_38_arg_1=0, var_39=0, var_39_arg_0=0, var_39_arg_1=1, var_40=1, var_40_arg_0=0, var_40_arg_1=0, var_41=0, var_41_arg_0=0, var_41_arg_1=1, var_42=0, var_42_arg_0=0, var_42_arg_1=0, var_5=0, var_62=1, var_65=200, var_66=0, var_67=65536, var_67_arg_0=1, var_67_arg_1=0, var_68=16, var_69=500, var_69_arg_0=0, var_69_arg_1=16, var_70=1, var_70_arg_0=200, var_70_arg_1=500, var_71=1, var_71_arg_0=1, var_71_arg_1=1, var_72=1, var_72_arg_0=0, var_72_arg_1=1, var_73=0, var_73_arg_0=0, var_73_arg_1=0, var_75=1, var_75_arg_0=0, var_75_arg_1=1, var_76=1, var_76_arg_0=1, var_76_arg_1=1, var_77=1, var_77_arg_0=1, var_77_arg_1=1, var_79=1, var_79_arg_0=1, var_79_arg_1=0, var_80=1, var_80_arg_0=1, var_80_arg_1=1, var_82=0, var_82_arg_0=0, var_82_arg_1=1, var_82_arg_2=0, var_83=0, var_83_arg_0=0, var_83_arg_1=0, var_84=65036, var_84_arg_0=0, var_84_arg_1=16, var_85=65536, var_85_arg_0=500, var_85_arg_1=65036, var_86=0, var_86_arg_0=65536, var_87=0, var_87_arg_0=1, var_87_arg_1=0, var_87_arg_2=0, var_88=0, var_88_arg_0=1, var_88_arg_1=0, var_88_arg_2=1, var_89=0, var_89_arg_0=0, var_89_arg_1=0, var_90=0, var_90_arg_0=0, var_90_arg_1=16, var_91=0, var_91_arg_0=200, var_91_arg_1=0, var_92=0, var_92_arg_0=1, var_92_arg_1=0, var_93=0, var_93_arg_0=0, var_93_arg_1=0, var_94=0, var_94_arg_0=1, var_94_arg_1=0, var_95=1, var_95_arg_0=1, var_95_arg_1=1, var_97=1, var_97_arg_0=1, var_97_arg_1=1, var_98=0, var_98_arg_0=0, var_98_arg_1=1, var_99=1, var_99_arg_0=0, var_99_arg_1=1] [L99] input_44 = __VERIFIER_nondet_ushort() [L100] input_44 = input_44 & mask_SORT_3 [L101] input_46 = __VERIFIER_nondet_ushort() [L102] input_46 = input_46 & mask_SORT_3 [L103] input_48 = __VERIFIER_nondet_ushort() [L104] input_48 = input_48 & mask_SORT_3 [L105] input_50 = __VERIFIER_nondet_uchar() [L106] input_50 = input_50 & mask_SORT_1 [L107] input_52 = __VERIFIER_nondet_uchar() [L108] input_52 = input_52 & mask_SORT_1 [L109] input_54 = __VERIFIER_nondet_uchar() [L110] input_54 = input_54 & mask_SORT_1 [L111] input_56 = __VERIFIER_nondet_uchar() [L112] input_56 = input_56 & mask_SORT_1 [L113] input_58 = __VERIFIER_nondet_uchar() [L114] input_58 = input_58 & mask_SORT_1 [L115] input_60 = __VERIFIER_nondet_uchar() [L116] input_60 = input_60 & mask_SORT_1 [L117] input_64 = __VERIFIER_nondet_uchar() [L118] input_64 = input_64 & mask_SORT_1 [L119] input_74 = __VERIFIER_nondet_uchar() [L120] input_74 = input_74 & mask_SORT_1 [L121] input_78 = __VERIFIER_nondet_uchar() [L122] input_78 = input_78 & mask_SORT_1 [L123] input_81 = __VERIFIER_nondet_uchar() [L124] input_81 = input_81 & mask_SORT_1 [L125] input_96 = __VERIFIER_nondet_uchar() [L126] input_96 = input_96 & mask_SORT_1 [L127] input_100 = __VERIFIER_nondet_uchar() [L128] input_100 = input_100 & mask_SORT_1 [L131] SORT_1 var_29_arg_0 = state_13; [L132] SORT_1 var_29_arg_1 = ~state_15; [L133] var_29_arg_1 = var_29_arg_1 & mask_SORT_1 [L134] SORT_1 var_29 = var_29_arg_0 & var_29_arg_1; [L135] SORT_1 var_30_arg_0 = var_29; [L136] SORT_1 var_30_arg_1 = ~state_17; [L137] var_30_arg_1 = var_30_arg_1 & mask_SORT_1 [L138] SORT_1 var_30 = var_30_arg_0 & var_30_arg_1; [L139] SORT_1 var_31_arg_0 = var_30; [L140] SORT_1 var_31_arg_1 = state_19; [L141] SORT_1 var_31 = var_31_arg_0 & var_31_arg_1; [L142] SORT_1 var_32_arg_0 = var_31; [L143] SORT_1 var_32_arg_1 = ~state_21; [L144] var_32_arg_1 = var_32_arg_1 & mask_SORT_1 [L145] SORT_1 var_32 = var_32_arg_0 & var_32_arg_1; [L146] SORT_1 var_33_arg_0 = var_32; [L147] SORT_1 var_33_arg_1 = ~state_23; [L148] var_33_arg_1 = var_33_arg_1 & mask_SORT_1 [L149] SORT_1 var_33 = var_33_arg_0 & var_33_arg_1; [L150] SORT_3 var_35_arg_0 = var_34; [L151] SORT_3 var_35_arg_1 = state_6; [L152] SORT_1 var_35 = var_35_arg_0 == var_35_arg_1; [L153] SORT_1 var_36_arg_0 = var_33; [L154] SORT_1 var_36_arg_1 = var_35; [L155] SORT_1 var_36 = var_36_arg_0 & var_36_arg_1; [L156] SORT_3 var_38_arg_0 = var_37; [L157] SORT_3 var_38_arg_1 = state_8; [L158] SORT_1 var_38 = var_38_arg_0 == var_38_arg_1; [L159] SORT_1 var_39_arg_0 = var_36; [L160] SORT_1 var_39_arg_1 = var_38; [L161] SORT_1 var_39 = var_39_arg_0 & var_39_arg_1; [L162] SORT_3 var_40_arg_0 = var_37; [L163] SORT_3 var_40_arg_1 = state_10; [L164] SORT_1 var_40 = var_40_arg_0 == var_40_arg_1; [L165] SORT_1 var_41_arg_0 = var_39; [L166] SORT_1 var_41_arg_1 = var_40; [L167] SORT_1 var_41 = var_41_arg_0 & var_41_arg_1; [L168] SORT_1 var_42_arg_0 = state_27; [L169] SORT_1 var_42_arg_1 = var_41; [L170] SORT_1 var_42 = var_42_arg_0 & var_42_arg_1; [L171] var_42 = var_42 & mask_SORT_1 [L172] SORT_1 bad_43_arg_0 = var_42; [L173] CALL __VERIFIER_assert(!(bad_43_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 50.6s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 3 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3 mSDsluCounter, 6 SdHoareTripleChecker+Invalid, 2.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7 IncrementalHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 2 mSDtfsCounter, 7 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8occurred in iteration=1, InterpolantAutomatonStates: 5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 29.4s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 8 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:44:12,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.2.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash da3c7b18fba80ae831b0cd08c5cdc7006df02217d3f1f102a3efb1e038053259 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:44:15,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:44:15,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:44:15,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:44:15,215 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:44:15,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:44:15,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:44:15,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:44:15,235 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:44:15,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:44:15,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:44:15,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:44:15,238 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:44:15,243 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:44:15,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:44:15,246 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:44:15,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:44:15,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:44:15,256 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:44:15,258 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:44:15,260 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:44:15,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:44:15,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:44:15,269 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:44:15,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:44:15,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:44:15,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:44:15,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:44:15,281 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:44:15,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:44:15,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:44:15,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:44:15,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:44:15,287 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:44:15,289 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:44:15,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:44:15,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:44:15,304 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:44:15,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:44:15,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:44:15,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:44:15,308 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:44:15,359 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:44:15,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:44:15,361 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:44:15,361 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:44:15,362 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:44:15,362 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:44:15,362 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:44:15,363 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:44:15,363 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:44:15,363 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:44:15,364 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:44:15,365 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:44:15,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:44:15,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:44:15,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:44:15,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:44:15,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:44:15,368 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:44:15,368 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:44:15,368 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:44:15,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:44:15,369 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:44:15,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:44:15,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:44:15,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:44:15,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:44:15,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:44:15,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:44:15,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:44:15,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:44:15,371 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:44:15,371 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:44:15,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:44:15,372 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:44:15,373 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:44:15,373 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da3c7b18fba80ae831b0cd08c5cdc7006df02217d3f1f102a3efb1e038053259 [2022-11-03 02:44:15,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:44:15,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:44:15,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:44:15,791 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:44:15,794 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:44:15,796 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.2.prop1-back-serstep.c [2022-11-03 02:44:15,869 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/data/e6b957b95/d116f460e65f4e67a9aa306027dde068/FLAG4ba1fe6e1 [2022-11-03 02:44:16,561 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:44:16,562 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.2.prop1-back-serstep.c [2022-11-03 02:44:16,587 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/data/e6b957b95/d116f460e65f4e67a9aa306027dde068/FLAG4ba1fe6e1 [2022-11-03 02:44:16,859 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/data/e6b957b95/d116f460e65f4e67a9aa306027dde068 [2022-11-03 02:44:16,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:44:16,865 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:44:16,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:44:16,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:44:16,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:44:16,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:44:16" (1/1) ... [2022-11-03 02:44:16,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e76ea07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:16, skipping insertion in model container [2022-11-03 02:44:16,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:44:16" (1/1) ... [2022-11-03 02:44:16,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:44:16,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:44:17,144 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.2.prop1-back-serstep.c[1014,1027] [2022-11-03 02:44:17,371 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:44:17,375 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:44:17,387 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.2.prop1-back-serstep.c[1014,1027] [2022-11-03 02:44:17,471 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:44:17,484 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:44:17,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:17 WrapperNode [2022-11-03 02:44:17,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:44:17,486 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:44:17,486 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:44:17,486 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:44:17,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:17" (1/1) ... [2022-11-03 02:44:17,525 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:17" (1/1) ... [2022-11-03 02:44:17,568 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 601 [2022-11-03 02:44:17,570 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:44:17,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:44:17,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:44:17,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:44:17,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:17" (1/1) ... [2022-11-03 02:44:17,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:17" (1/1) ... [2022-11-03 02:44:17,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:17" (1/1) ... [2022-11-03 02:44:17,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:17" (1/1) ... [2022-11-03 02:44:17,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:17" (1/1) ... [2022-11-03 02:44:17,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:17" (1/1) ... [2022-11-03 02:44:17,646 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:17" (1/1) ... [2022-11-03 02:44:17,648 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:17" (1/1) ... [2022-11-03 02:44:17,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:44:17,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:44:17,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:44:17,661 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:44:17,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:17" (1/1) ... [2022-11-03 02:44:17,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:44:17,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:44:17,700 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:44:17,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:44:17,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:44:17,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:44:17,930 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:44:17,932 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:44:18,698 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:44:18,709 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:44:18,710 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:44:18,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:44:18 BoogieIcfgContainer [2022-11-03 02:44:18,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:44:18,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:44:18,716 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:44:18,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:44:18,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:44:16" (1/3) ... [2022-11-03 02:44:18,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fbb74d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:44:18, skipping insertion in model container [2022-11-03 02:44:18,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:17" (2/3) ... [2022-11-03 02:44:18,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fbb74d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:44:18, skipping insertion in model container [2022-11-03 02:44:18,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:44:18" (3/3) ... [2022-11-03 02:44:18,723 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.adding.2.prop1-back-serstep.c [2022-11-03 02:44:18,743 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:44:18,744 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:44:18,818 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:44:18,826 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;@f090d47, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:44:18,826 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:44:18,831 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 40 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:18,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:44:18,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:18,838 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:44:18,839 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:18,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:18,846 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 02:44:18,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:18,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [886448429] [2022-11-03 02:44:18,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:18,863 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:18,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:18,870 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:18,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:44:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:19,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:44:19,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:19,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:19,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:19,240 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:19,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [886448429] [2022-11-03 02:44:19,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [886448429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:19,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:19,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:44:19,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028874279] [2022-11-03 02:44:19,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:19,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:44:19,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:19,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:44:19,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:44:19,281 INFO L87 Difference]: Start difference. First operand has 41 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 40 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:19,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:19,469 INFO L93 Difference]: Finished difference Result 110 states and 165 transitions. [2022-11-03 02:44:19,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:44:19,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 02:44:19,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:19,481 INFO L225 Difference]: With dead ends: 110 [2022-11-03 02:44:19,481 INFO L226 Difference]: Without dead ends: 71 [2022-11-03 02:44:19,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:44:19,488 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 94 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:19,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 143 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:44:19,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-03 02:44:19,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 39. [2022-11-03 02:44:19,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 38 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:19,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2022-11-03 02:44:19,525 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 5 [2022-11-03 02:44:19,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:19,525 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 54 transitions. [2022-11-03 02:44:19,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:19,526 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 54 transitions. [2022-11-03 02:44:19,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 02:44:19,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:19,527 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:19,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:19,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:19,740 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:19,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:19,741 INFO L85 PathProgramCache]: Analyzing trace with hash -473289749, now seen corresponding path program 1 times [2022-11-03 02:44:19,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:19,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488952177] [2022-11-03 02:44:19,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:19,744 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:19,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:19,751 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:19,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:44:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:20,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:44:20,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:20,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:20,380 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:20,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488952177] [2022-11-03 02:44:20,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488952177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:20,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:20,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:44:20,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600238348] [2022-11-03 02:44:20,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:20,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:44:20,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:20,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:44:20,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:44:20,391 INFO L87 Difference]: Start difference. First operand 39 states and 54 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:20,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:20,447 INFO L93 Difference]: Finished difference Result 79 states and 111 transitions. [2022-11-03 02:44:20,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:44:20,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-03 02:44:20,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:20,449 INFO L225 Difference]: With dead ends: 79 [2022-11-03 02:44:20,449 INFO L226 Difference]: Without dead ends: 44 [2022-11-03 02:44:20,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:44:20,451 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 2 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:20,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 118 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2022-11-03 02:44:20,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-03 02:44:20,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-11-03 02:44:20,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 42 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:20,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 59 transitions. [2022-11-03 02:44:20,459 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 59 transitions. Word has length 38 [2022-11-03 02:44:20,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:20,459 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 59 transitions. [2022-11-03 02:44:20,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:20,460 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 59 transitions. [2022-11-03 02:44:20,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 02:44:20,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:20,461 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:20,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:20,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:20,679 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:20,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:20,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1174889623, now seen corresponding path program 1 times [2022-11-03 02:44:20,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:20,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788019431] [2022-11-03 02:44:20,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:20,681 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:20,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:20,683 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:20,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:44:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:21,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:44:21,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:21,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:21,285 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:21,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788019431] [2022-11-03 02:44:21,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788019431] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:21,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:21,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:44:21,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594128801] [2022-11-03 02:44:21,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:21,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:44:21,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:21,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:44:21,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:44:21,288 INFO L87 Difference]: Start difference. First operand 43 states and 59 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:21,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:21,315 INFO L93 Difference]: Finished difference Result 92 states and 130 transitions. [2022-11-03 02:44:21,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:44:21,316 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-03 02:44:21,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:21,317 INFO L225 Difference]: With dead ends: 92 [2022-11-03 02:44:21,317 INFO L226 Difference]: Without dead ends: 57 [2022-11-03 02:44:21,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:44:21,321 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:21,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 123 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2022-11-03 02:44:21,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-03 02:44:21,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-03 02:44:21,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 56 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:21,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2022-11-03 02:44:21,335 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 38 [2022-11-03 02:44:21,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:21,335 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2022-11-03 02:44:21,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:21,336 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2022-11-03 02:44:21,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 02:44:21,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:21,337 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:21,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:21,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:21,557 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:21,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:21,557 INFO L85 PathProgramCache]: Analyzing trace with hash 413458279, now seen corresponding path program 1 times [2022-11-03 02:44:21,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:21,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828999922] [2022-11-03 02:44:21,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:21,559 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:21,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:21,566 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:21,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:44:21,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:21,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:44:21,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:22,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:22,069 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:22,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828999922] [2022-11-03 02:44:22,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828999922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:22,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:22,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:44:22,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7355172] [2022-11-03 02:44:22,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:22,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:44:22,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:22,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:44:22,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:44:22,076 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:22,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:22,150 INFO L93 Difference]: Finished difference Result 155 states and 220 transitions. [2022-11-03 02:44:22,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:44:22,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-03 02:44:22,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:22,152 INFO L225 Difference]: With dead ends: 155 [2022-11-03 02:44:22,153 INFO L226 Difference]: Without dead ends: 120 [2022-11-03 02:44:22,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:44:22,154 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 65 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:22,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 192 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:44:22,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-03 02:44:22,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 85. [2022-11-03 02:44:22,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4285714285714286) internal successors, (120), 84 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:22,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 120 transitions. [2022-11-03 02:44:22,169 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 120 transitions. Word has length 38 [2022-11-03 02:44:22,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:22,169 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 120 transitions. [2022-11-03 02:44:22,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:22,170 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 120 transitions. [2022-11-03 02:44:22,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 02:44:22,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:22,173 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:22,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:22,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:22,387 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:22,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:22,387 INFO L85 PathProgramCache]: Analyzing trace with hash 415305321, now seen corresponding path program 1 times [2022-11-03 02:44:22,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:22,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537554548] [2022-11-03 02:44:22,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:22,389 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:22,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:22,390 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:22,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:44:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:22,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:44:22,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:23,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:24,159 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:24,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537554548] [2022-11-03 02:44:24,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537554548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:24,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1398307286] [2022-11-03 02:44:24,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:24,160 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:44:24,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:44:24,166 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:44:24,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-03 02:44:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:24,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:44:24,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:27,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:27,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:29,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:29,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1398307286] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:29,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806461559] [2022-11-03 02:44:29,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:29,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:44:29,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:44:29,182 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:44:29,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:44:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:29,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:44:29,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:30,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:30,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:31,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:31,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806461559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:31,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:44:31,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11, 11, 11, 11] total 30 [2022-11-03 02:44:31,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264425392] [2022-11-03 02:44:31,750 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:44:31,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 02:44:31,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:31,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 02:44:31,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=760, Unknown=1, NotChecked=0, Total=870 [2022-11-03 02:44:31,754 INFO L87 Difference]: Start difference. First operand 85 states and 120 transitions. Second operand has 30 states, 30 states have (on average 4.1) internal successors, (123), 30 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:34,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:34,476 INFO L93 Difference]: Finished difference Result 127 states and 179 transitions. [2022-11-03 02:44:34,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:44:34,477 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.1) internal successors, (123), 30 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-03 02:44:34,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:34,479 INFO L225 Difference]: With dead ends: 127 [2022-11-03 02:44:34,479 INFO L226 Difference]: Without dead ends: 125 [2022-11-03 02:44:34,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 190 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=166, Invalid=1092, Unknown=2, NotChecked=0, Total=1260 [2022-11-03 02:44:34,480 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 121 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:34,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 608 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 242 Unchecked, 0.2s Time] [2022-11-03 02:44:34,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-03 02:44:34,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 114. [2022-11-03 02:44:34,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.424778761061947) internal successors, (161), 113 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:34,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 161 transitions. [2022-11-03 02:44:34,491 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 161 transitions. Word has length 38 [2022-11-03 02:44:34,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:34,491 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 161 transitions. [2022-11-03 02:44:34,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.1) internal successors, (123), 30 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:34,492 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 161 transitions. [2022-11-03 02:44:34,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 02:44:34,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:34,493 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:34,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:34,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:34,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:35,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:44:35,117 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:35,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:35,118 INFO L85 PathProgramCache]: Analyzing trace with hash -543829265, now seen corresponding path program 1 times [2022-11-03 02:44:35,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:35,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [301988030] [2022-11-03 02:44:35,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:35,120 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:35,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:35,121 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:35,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:44:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:35,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:44:35,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:35,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:35,809 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:35,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [301988030] [2022-11-03 02:44:35,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [301988030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:35,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:35,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:44:35,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829782959] [2022-11-03 02:44:35,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:35,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:44:35,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:35,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:44:35,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:44:35,812 INFO L87 Difference]: Start difference. First operand 114 states and 161 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:35,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:35,997 INFO L93 Difference]: Finished difference Result 173 states and 246 transitions. [2022-11-03 02:44:35,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:44:35,997 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-03 02:44:35,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:35,998 INFO L225 Difference]: With dead ends: 173 [2022-11-03 02:44:35,998 INFO L226 Difference]: Without dead ends: 116 [2022-11-03 02:44:35,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:44:36,000 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 9 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:36,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 220 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 95 Unchecked, 0.0s Time] [2022-11-03 02:44:36,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-03 02:44:36,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-11-03 02:44:36,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.4173913043478261) internal successors, (163), 115 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:36,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 163 transitions. [2022-11-03 02:44:36,020 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 163 transitions. Word has length 38 [2022-11-03 02:44:36,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:36,021 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 163 transitions. [2022-11-03 02:44:36,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:36,021 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 163 transitions. [2022-11-03 02:44:36,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 02:44:36,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:36,022 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:36,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:36,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:36,242 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:36,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:36,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1379398769, now seen corresponding path program 1 times [2022-11-03 02:44:36,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:36,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206342250] [2022-11-03 02:44:36,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:36,243 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:36,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:36,244 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:36,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:44:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:36,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:44:36,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:43,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:43,482 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:43,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206342250] [2022-11-03 02:44:43,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1206342250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:43,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:43,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:44:43,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981300628] [2022-11-03 02:44:43,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:43,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:44:43,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:43,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:44:43,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=48, Unknown=3, NotChecked=0, Total=72 [2022-11-03 02:44:43,485 INFO L87 Difference]: Start difference. First operand 116 states and 163 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:43,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:43,490 INFO L93 Difference]: Finished difference Result 173 states and 245 transitions. [2022-11-03 02:44:43,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:44:43,490 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-03 02:44:43,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:43,491 INFO L225 Difference]: With dead ends: 173 [2022-11-03 02:44:43,491 INFO L226 Difference]: Without dead ends: 118 [2022-11-03 02:44:43,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=21, Invalid=48, Unknown=3, NotChecked=0, Total=72 [2022-11-03 02:44:43,493 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 4 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:43,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 229 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 97 Unchecked, 0.0s Time] [2022-11-03 02:44:43,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-03 02:44:43,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-11-03 02:44:43,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.4102564102564104) internal successors, (165), 117 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:43,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 165 transitions. [2022-11-03 02:44:43,515 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 165 transitions. Word has length 38 [2022-11-03 02:44:43,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:43,516 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 165 transitions. [2022-11-03 02:44:43,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:43,516 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 165 transitions. [2022-11-03 02:44:43,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 02:44:43,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:43,523 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:43,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:43,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:43,735 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:43,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:43,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1519947379, now seen corresponding path program 1 times [2022-11-03 02:44:43,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:43,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800087828] [2022-11-03 02:44:43,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:43,737 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:43,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:43,738 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:43,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:44:44,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:44,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:44:44,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:44,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:44,291 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:44,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800087828] [2022-11-03 02:44:44,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1800087828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:44,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:44,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:44:44,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27904218] [2022-11-03 02:44:44,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:44,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:44:44,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:44,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:44:44,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:44:44,293 INFO L87 Difference]: Start difference. First operand 118 states and 165 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:44,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:44,380 INFO L93 Difference]: Finished difference Result 184 states and 258 transitions. [2022-11-03 02:44:44,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:44:44,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-03 02:44:44,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:44,383 INFO L225 Difference]: With dead ends: 184 [2022-11-03 02:44:44,383 INFO L226 Difference]: Without dead ends: 122 [2022-11-03 02:44:44,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:44:44,385 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 9 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:44,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 123 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-11-03 02:44:44,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-03 02:44:44,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 108. [2022-11-03 02:44:44,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.3925233644859814) internal successors, (149), 107 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:44,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 149 transitions. [2022-11-03 02:44:44,394 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 149 transitions. Word has length 38 [2022-11-03 02:44:44,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:44,394 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 149 transitions. [2022-11-03 02:44:44,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:44,395 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 149 transitions. [2022-11-03 02:44:44,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 02:44:44,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:44,396 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:44,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:44,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:44,624 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:44,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:44,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1186672015, now seen corresponding path program 1 times [2022-11-03 02:44:44,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:44,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2080402284] [2022-11-03 02:44:44,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:44,625 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:44,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:44,626 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:44,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:44:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:44,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-03 02:44:44,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:48,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:48,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:50,222 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:50,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2080402284] [2022-11-03 02:44:50,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2080402284] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:50,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2003968827] [2022-11-03 02:44:50,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:50,225 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:44:50,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:44:50,227 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:44:50,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-03 02:44:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:50,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 02:44:50,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:02,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:02,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:29,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:29,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2003968827] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:29,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383550701] [2022-11-03 02:45:29,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:29,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:29,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:29,390 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:29,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:45:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:29,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-03 02:45:29,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:36,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:36,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:07,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383550701] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:07,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:46:07,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 23, 23, 24, 24] total 77 [2022-11-03 02:46:07,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707335966] [2022-11-03 02:46:07,021 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:46:07,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-03 02:46:07,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:46:07,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-03 02:46:07,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=5531, Unknown=24, NotChecked=0, Total=5852 [2022-11-03 02:46:07,025 INFO L87 Difference]: Start difference. First operand 108 states and 149 transitions. Second operand has 77 states, 77 states have (on average 2.1298701298701297) internal successors, (164), 77 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:37,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:37,472 INFO L93 Difference]: Finished difference Result 166 states and 226 transitions. [2022-11-03 02:46:37,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-03 02:46:37,473 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.1298701298701297) internal successors, (164), 77 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-03 02:46:37,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:37,474 INFO L225 Difference]: With dead ends: 166 [2022-11-03 02:46:37,474 INFO L226 Difference]: Without dead ends: 164 [2022-11-03 02:46:37,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 156 SyntacticMatches, 5 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2864 ImplicationChecksByTransitivity, 105.9s TimeCoverageRelationStatistics Valid=698, Invalid=10196, Unknown=26, NotChecked=0, Total=10920 [2022-11-03 02:46:37,479 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 449 mSDsluCounter, 2857 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 2943 SdHoareTripleChecker+Invalid, 1848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1818 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:37,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 2943 Invalid, 1848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 1818 Unchecked, 0.1s Time] [2022-11-03 02:46:37,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-03 02:46:37,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 82. [2022-11-03 02:46:37,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.382716049382716) internal successors, (112), 81 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:37,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 112 transitions. [2022-11-03 02:46:37,486 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 112 transitions. Word has length 38 [2022-11-03 02:46:37,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:37,486 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 112 transitions. [2022-11-03 02:46:37,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.1298701298701297) internal successors, (164), 77 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:37,487 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 112 transitions. [2022-11-03 02:46:37,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:46:37,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:37,488 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:46:37,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-11-03 02:46:37,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:37,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:38,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:38,120 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:38,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:38,120 INFO L85 PathProgramCache]: Analyzing trace with hash 759382539, now seen corresponding path program 1 times [2022-11-03 02:46:38,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:46:38,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2074577507] [2022-11-03 02:46:38,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:38,123 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:46:38,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:46:38,124 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:46:38,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:46:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:38,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:46:38,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:38,836 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:46:38,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:46:38,836 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:46:38,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2074577507] [2022-11-03 02:46:38,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2074577507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:38,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:46:38,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:46:38,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513461385] [2022-11-03 02:46:38,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:38,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:46:38,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:46:38,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:46:38,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:46:38,839 INFO L87 Difference]: Start difference. First operand 82 states and 112 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:38,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:38,914 INFO L93 Difference]: Finished difference Result 119 states and 165 transitions. [2022-11-03 02:46:38,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:46:38,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:46:38,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:38,916 INFO L225 Difference]: With dead ends: 119 [2022-11-03 02:46:38,916 INFO L226 Difference]: Without dead ends: 84 [2022-11-03 02:46:38,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:46:38,917 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 17 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:38,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 101 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-03 02:46:38,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-03 02:46:38,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-11-03 02:46:38,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.3734939759036144) internal successors, (114), 83 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:38,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 114 transitions. [2022-11-03 02:46:38,923 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 114 transitions. Word has length 71 [2022-11-03 02:46:38,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:38,923 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 114 transitions. [2022-11-03 02:46:38,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:38,924 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 114 transitions. [2022-11-03 02:46:38,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:46:38,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:38,925 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:46:38,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:39,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:46:39,126 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:39,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:39,127 INFO L85 PathProgramCache]: Analyzing trace with hash 57782665, now seen corresponding path program 1 times [2022-11-03 02:46:39,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:46:39,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1056879640] [2022-11-03 02:46:39,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:39,128 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:46:39,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:46:39,129 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:46:39,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:46:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:39,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:46:39,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:39,837 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:46:39,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:46:39,837 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:46:39,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1056879640] [2022-11-03 02:46:39,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1056879640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:39,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:46:39,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:46:39,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212320232] [2022-11-03 02:46:39,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:39,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:46:39,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:46:39,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:46:39,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:46:39,840 INFO L87 Difference]: Start difference. First operand 84 states and 114 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:39,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:39,902 INFO L93 Difference]: Finished difference Result 123 states and 169 transitions. [2022-11-03 02:46:39,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:46:39,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:46:39,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:39,904 INFO L225 Difference]: With dead ends: 123 [2022-11-03 02:46:39,904 INFO L226 Difference]: Without dead ends: 86 [2022-11-03 02:46:39,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:46:39,906 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 17 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:39,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 102 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-03 02:46:39,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-03 02:46:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-11-03 02:46:39,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.3647058823529412) internal successors, (116), 85 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:39,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 116 transitions. [2022-11-03 02:46:39,911 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 116 transitions. Word has length 71 [2022-11-03 02:46:39,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:39,912 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 116 transitions. [2022-11-03 02:46:39,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:39,912 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 116 transitions. [2022-11-03 02:46:39,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:46:39,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:39,914 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:46:39,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:40,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:46:40,114 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:40,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:40,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1646130567, now seen corresponding path program 1 times [2022-11-03 02:46:40,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:46:40,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389216866] [2022-11-03 02:46:40,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:40,116 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:46:40,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:46:40,118 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:46:40,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:46:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:40,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:46:40,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:46:41,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:46:43,073 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:46:43,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389216866] [2022-11-03 02:46:43,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389216866] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:43,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1335943417] [2022-11-03 02:46:43,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:43,074 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:46:43,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:46:43,077 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:46:43,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-03 02:46:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:43,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 02:46:43,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:46:47,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:49,655 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:46:49,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1335943417] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:49,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893474982] [2022-11-03 02:46:49,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:49,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:49,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:49,657 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:49,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 02:46:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:50,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-03 02:46:50,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:52,892 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:46:52,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:17,100 WARN L234 SmtUtils]: Spent 8.29s on a formula simplification that was a NOOP. DAG size: 198 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:47:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:47:28,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893474982] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:28,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:47:28,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12, 12, 13, 13] total 42 [2022-11-03 02:47:28,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475433591] [2022-11-03 02:47:28,081 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:47:28,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 02:47:28,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:47:28,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 02:47:28,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1587, Unknown=6, NotChecked=0, Total=1722 [2022-11-03 02:47:28,083 INFO L87 Difference]: Start difference. First operand 86 states and 116 transitions. Second operand has 42 states, 42 states have (on average 7.309523809523809) internal successors, (307), 42 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:35,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:35,326 INFO L93 Difference]: Finished difference Result 182 states and 249 transitions. [2022-11-03 02:47:35,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-03 02:47:35,327 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 7.309523809523809) internal successors, (307), 42 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:47:35,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:35,328 INFO L225 Difference]: With dead ends: 182 [2022-11-03 02:47:35,328 INFO L226 Difference]: Without dead ends: 180 [2022-11-03 02:47:35,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 380 SyntacticMatches, 7 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 45.0s TimeCoverageRelationStatistics Valid=540, Invalid=4423, Unknown=7, NotChecked=0, Total=4970 [2022-11-03 02:47:35,330 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 220 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:35,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 852 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 212 Unchecked, 0.1s Time] [2022-11-03 02:47:35,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-03 02:47:35,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 148. [2022-11-03 02:47:35,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.380952380952381) internal successors, (203), 147 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:35,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 203 transitions. [2022-11-03 02:47:35,337 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 203 transitions. Word has length 71 [2022-11-03 02:47:35,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:35,337 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 203 transitions. [2022-11-03 02:47:35,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 7.309523809523809) internal successors, (307), 42 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:35,338 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 203 transitions. [2022-11-03 02:47:35,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:47:35,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:35,338 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:47:35,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:35,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:35,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-11-03 02:47:35,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:47:35,939 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:35,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:35,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1647977609, now seen corresponding path program 2 times [2022-11-03 02:47:35,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:47:35,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [637948204] [2022-11-03 02:47:35,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:47:35,941 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:47:35,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:47:35,942 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:47:35,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:47:36,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:47:36,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:36,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:47:36,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:36,641 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:36,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:36,916 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:47:36,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [637948204] [2022-11-03 02:47:36,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [637948204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:36,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [442408820] [2022-11-03 02:47:36,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:47:36,917 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:47:36,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:47:36,918 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:47:36,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-03 02:47:37,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:47:37,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:37,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:47:37,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:37,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:37,960 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:37,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [442408820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:37,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010138668] [2022-11-03 02:47:37,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:47:37,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:37,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:37,962 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:37,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 02:47:38,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:47:38,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:38,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:47:38,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:38,503 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:38,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:38,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010138668] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:38,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:47:38,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2022-11-03 02:47:38,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514720012] [2022-11-03 02:47:38,714 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:47:38,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:47:38,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:47:38,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:47:38,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:47:38,716 INFO L87 Difference]: Start difference. First operand 148 states and 203 transitions. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:38,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:38,894 INFO L93 Difference]: Finished difference Result 285 states and 394 transitions. [2022-11-03 02:47:38,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:47:38,895 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:47:38,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:38,898 INFO L225 Difference]: With dead ends: 285 [2022-11-03 02:47:38,898 INFO L226 Difference]: Without dead ends: 210 [2022-11-03 02:47:38,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:47:38,899 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 132 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:38,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 407 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:47:38,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-03 02:47:38,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 145. [2022-11-03 02:47:38,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.3680555555555556) internal successors, (197), 144 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:38,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 197 transitions. [2022-11-03 02:47:38,905 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 197 transitions. Word has length 71 [2022-11-03 02:47:38,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:38,906 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 197 transitions. [2022-11-03 02:47:38,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:38,906 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 197 transitions. [2022-11-03 02:47:38,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:47:38,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:38,907 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:47:38,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:39,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:39,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-03 02:47:39,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:39,508 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:39,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:39,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1059324553, now seen corresponding path program 1 times [2022-11-03 02:47:39,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:47:39,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066945103] [2022-11-03 02:47:39,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:39,510 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:47:39,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:47:39,511 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:47:39,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:47:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:39,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:47:39,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:40,376 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:47:40,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:47:40,377 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:47:40,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1066945103] [2022-11-03 02:47:40,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1066945103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:47:40,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:47:40,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:47:40,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873931140] [2022-11-03 02:47:40,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:47:40,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:47:40,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:47:40,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:47:40,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:47:40,379 INFO L87 Difference]: Start difference. First operand 145 states and 197 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:40,465 INFO L93 Difference]: Finished difference Result 251 states and 340 transitions. [2022-11-03 02:47:40,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:47:40,471 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:47:40,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:40,472 INFO L225 Difference]: With dead ends: 251 [2022-11-03 02:47:40,472 INFO L226 Difference]: Without dead ends: 201 [2022-11-03 02:47:40,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:47:40,473 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 16 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:40,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 218 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 85 Unchecked, 0.1s Time] [2022-11-03 02:47:40,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-03 02:47:40,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2022-11-03 02:47:40,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.3535353535353536) internal successors, (268), 198 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:40,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 268 transitions. [2022-11-03 02:47:40,482 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 268 transitions. Word has length 71 [2022-11-03 02:47:40,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:40,482 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 268 transitions. [2022-11-03 02:47:40,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:40,483 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 268 transitions. [2022-11-03 02:47:40,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:47:40,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:40,484 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:47:40,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-11-03 02:47:40,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:47:40,694 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:40,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:40,695 INFO L85 PathProgramCache]: Analyzing trace with hash 366266889, now seen corresponding path program 1 times [2022-11-03 02:47:40,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:47:40,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [396264154] [2022-11-03 02:47:40,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:40,696 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:47:40,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:47:40,697 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:47:40,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:47:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:41,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:47:41,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:42,115 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:47:42,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:43,305 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:47:43,305 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:47:43,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [396264154] [2022-11-03 02:47:43,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [396264154] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:43,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [753802293] [2022-11-03 02:47:43,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:43,306 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:47:43,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:47:43,307 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:47:43,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-03 02:47:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:44,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 02:47:44,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:47:52,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:47:58,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [753802293] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:58,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775329253] [2022-11-03 02:47:58,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:58,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:58,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:58,304 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:58,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-03 02:47:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:58,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-03 02:47:58,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:02,159 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:48:02,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:33,364 WARN L234 SmtUtils]: Spent 8.14s on a formula simplification that was a NOOP. DAG size: 216 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:48:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:48:40,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775329253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:40,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:48:40,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 13, 13, 14, 14] total 56 [2022-11-03 02:48:40,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779773297] [2022-11-03 02:48:40,992 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:48:40,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-03 02:48:40,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:48:40,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-03 02:48:40,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2841, Unknown=10, NotChecked=0, Total=3080 [2022-11-03 02:48:40,995 INFO L87 Difference]: Start difference. First operand 199 states and 268 transitions. Second operand has 56 states, 56 states have (on average 7.214285714285714) internal successors, (404), 56 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:49,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:49,443 INFO L93 Difference]: Finished difference Result 309 states and 414 transitions. [2022-11-03 02:48:49,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-03 02:48:49,444 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 7.214285714285714) internal successors, (404), 56 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:48:49,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:49,446 INFO L225 Difference]: With dead ends: 309 [2022-11-03 02:48:49,446 INFO L226 Difference]: Without dead ends: 307 [2022-11-03 02:48:49,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 369 SyntacticMatches, 7 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 59.1s TimeCoverageRelationStatistics Valid=740, Invalid=6222, Unknown=10, NotChecked=0, Total=6972 [2022-11-03 02:48:49,449 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 227 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:49,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 995 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 189 Unchecked, 0.1s Time] [2022-11-03 02:48:49,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-11-03 02:48:49,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 301. [2022-11-03 02:48:49,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.3533333333333333) internal successors, (406), 300 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:49,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 406 transitions. [2022-11-03 02:48:49,468 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 406 transitions. Word has length 71 [2022-11-03 02:48:49,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:49,468 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 406 transitions. [2022-11-03 02:48:49,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 7.214285714285714) internal successors, (404), 56 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:49,469 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 406 transitions. [2022-11-03 02:48:49,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:48:49,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:49,470 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:48:49,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:49,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-11-03 02:48:49,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:50,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:50,079 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:50,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:50,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1046325259, now seen corresponding path program 1 times [2022-11-03 02:48:50,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:50,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039596973] [2022-11-03 02:48:50,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:50,081 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:50,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:50,082 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:50,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 02:48:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:50,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:48:50,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:48:51,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:48:52,622 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:52,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039596973] [2022-11-03 02:48:52,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2039596973] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:52,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [67409327] [2022-11-03 02:48:52,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:52,623 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:52,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:52,626 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:52,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-03 02:48:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:53,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 02:48:53,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:49:00,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:49:05,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [67409327] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:05,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774597686] [2022-11-03 02:49:05,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:05,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:05,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:05,421 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:05,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-03 02:49:05,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:05,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-03 02:49:05,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:49:09,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:49:36,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774597686] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:36,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:49:36,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 14, 14, 14, 14] total 58 [2022-11-03 02:49:36,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738957311] [2022-11-03 02:49:36,178 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:49:36,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-03 02:49:36,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:36,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-03 02:49:36,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=3054, Unknown=8, NotChecked=0, Total=3306 [2022-11-03 02:49:36,180 INFO L87 Difference]: Start difference. First operand 301 states and 406 transitions. Second operand has 58 states, 58 states have (on average 6.9655172413793105) internal successors, (404), 58 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:48,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:48,397 INFO L93 Difference]: Finished difference Result 457 states and 610 transitions. [2022-11-03 02:49:48,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 02:49:48,398 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 6.9655172413793105) internal successors, (404), 58 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:49:48,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:48,400 INFO L225 Difference]: With dead ends: 457 [2022-11-03 02:49:48,400 INFO L226 Difference]: Without dead ends: 455 [2022-11-03 02:49:48,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 365 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 49.0s TimeCoverageRelationStatistics Valid=725, Invalid=6239, Unknown=8, NotChecked=0, Total=6972 [2022-11-03 02:49:48,402 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 260 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1106 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:48,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 1106 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 160 Unchecked, 0.1s Time] [2022-11-03 02:49:48,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-11-03 02:49:48,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 449. [2022-11-03 02:49:48,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.34375) internal successors, (602), 448 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:48,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 602 transitions. [2022-11-03 02:49:48,419 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 602 transitions. Word has length 71 [2022-11-03 02:49:48,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:48,420 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 602 transitions. [2022-11-03 02:49:48,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 6.9655172413793105) internal successors, (404), 58 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:48,420 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 602 transitions. [2022-11-03 02:49:48,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:49:48,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:48,422 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:49:48,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:48,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:48,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:49,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:49,031 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:49,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:49,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1473634675, now seen corresponding path program 1 times [2022-11-03 02:49:49,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:49,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558916425] [2022-11-03 02:49:49,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:49,032 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:49,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:49,033 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:49,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 02:49:49,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:49,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:49:49,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:49:50,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:49:51,575 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:51,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558916425] [2022-11-03 02:49:51,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558916425] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:51,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1454559677] [2022-11-03 02:49:51,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:51,576 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:49:51,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:49:51,577 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:49:51,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-03 02:49:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:52,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 02:49:52,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:55,672 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:49:55,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:49:59,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1454559677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:59,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080613227] [2022-11-03 02:49:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:59,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:59,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:59,352 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:59,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-03 02:49:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:59,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-03 02:49:59,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:50:05,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:50:21,092 WARN L234 SmtUtils]: Spent 6.49s on a formula simplification that was a NOOP. DAG size: 214 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:50:43,383 WARN L234 SmtUtils]: Spent 8.15s on a formula simplification that was a NOOP. DAG size: 216 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:50:54,225 WARN L234 SmtUtils]: Spent 6.28s on a formula simplification that was a NOOP. DAG size: 220 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:50:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:50:54,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080613227] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:50:54,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:50:54,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12, 12, 14, 14] total 44 [2022-11-03 02:50:54,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667319081] [2022-11-03 02:50:54,372 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:50:54,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 02:50:54,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:54,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 02:50:54,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1751, Unknown=7, NotChecked=0, Total=1892 [2022-11-03 02:50:54,374 INFO L87 Difference]: Start difference. First operand 449 states and 602 transitions. Second operand has 44 states, 44 states have (on average 6.9772727272727275) internal successors, (307), 44 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:04,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:04,980 INFO L93 Difference]: Finished difference Result 533 states and 709 transitions. [2022-11-03 02:51:04,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 02:51:04,981 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 6.9772727272727275) internal successors, (307), 44 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:51:04,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:04,983 INFO L225 Difference]: With dead ends: 533 [2022-11-03 02:51:04,983 INFO L226 Difference]: Without dead ends: 531 [2022-11-03 02:51:04,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 377 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 64.0s TimeCoverageRelationStatistics Valid=424, Invalid=3728, Unknown=8, NotChecked=0, Total=4160 [2022-11-03 02:51:04,985 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 194 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:04,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 882 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 170 Unchecked, 0.2s Time] [2022-11-03 02:51:04,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-11-03 02:51:05,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 301. [2022-11-03 02:51:05,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.3533333333333333) internal successors, (406), 300 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:05,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 406 transitions. [2022-11-03 02:51:05,003 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 406 transitions. Word has length 71 [2022-11-03 02:51:05,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:05,003 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 406 transitions. [2022-11-03 02:51:05,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 6.9772727272727275) internal successors, (307), 44 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:05,004 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 406 transitions. [2022-11-03 02:51:05,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:51:05,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:05,005 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:51:05,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-11-03 02:51:05,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:05,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:05,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:05,618 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:05,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:05,619 INFO L85 PathProgramCache]: Analyzing trace with hash -220539125, now seen corresponding path program 1 times [2022-11-03 02:51:05,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:05,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [584128005] [2022-11-03 02:51:05,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:05,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:05,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:05,621 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:05,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 02:51:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:06,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:51:06,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:06,811 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:51:06,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:06,812 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:06,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [584128005] [2022-11-03 02:51:06,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [584128005] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:06,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:06,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:51:06,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358883986] [2022-11-03 02:51:06,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:06,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:51:06,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:06,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:51:06,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:06,814 INFO L87 Difference]: Start difference. First operand 301 states and 406 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:06,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:06,927 INFO L93 Difference]: Finished difference Result 353 states and 476 transitions. [2022-11-03 02:51:06,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:51:06,928 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:51:06,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:06,930 INFO L225 Difference]: With dead ends: 353 [2022-11-03 02:51:06,930 INFO L226 Difference]: Without dead ends: 305 [2022-11-03 02:51:06,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:06,932 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 16 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:06,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 103 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-11-03 02:51:06,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-11-03 02:51:06,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2022-11-03 02:51:06,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.3486842105263157) internal successors, (410), 304 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:06,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 410 transitions. [2022-11-03 02:51:06,946 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 410 transitions. Word has length 71 [2022-11-03 02:51:06,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:06,946 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 410 transitions. [2022-11-03 02:51:06,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:06,947 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 410 transitions. [2022-11-03 02:51:06,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:51:06,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:06,948 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:51:06,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:07,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:07,154 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:07,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:07,155 INFO L85 PathProgramCache]: Analyzing trace with hash 480525453, now seen corresponding path program 1 times [2022-11-03 02:51:07,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:07,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868532244] [2022-11-03 02:51:07,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:07,156 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:07,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:07,157 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:07,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 02:51:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:07,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:51:07,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:10,230 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:51:10,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:51:13,249 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:13,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868532244] [2022-11-03 02:51:13,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868532244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:13,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1474292173] [2022-11-03 02:51:13,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:13,250 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:13,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:51:13,251 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:51:13,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-03 02:51:14,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:14,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 02:51:14,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:51:30,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:39,621 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:51:39,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1474292173] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:39,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708825445] [2022-11-03 02:51:39,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:39,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:39,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:39,623 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:39,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-03 02:51:40,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:40,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-03 02:51:40,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:51:48,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:52:20,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708825445] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:20,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:52:20,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 13, 13, 14, 14] total 56 [2022-11-03 02:52:20,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302216811] [2022-11-03 02:52:20,513 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:52:20,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-03 02:52:20,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:52:20,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-03 02:52:20,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2842, Unknown=9, NotChecked=0, Total=3080 [2022-11-03 02:52:20,517 INFO L87 Difference]: Start difference. First operand 305 states and 410 transitions. Second operand has 56 states, 56 states have (on average 7.214285714285714) internal successors, (404), 56 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:13,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:13,044 INFO L93 Difference]: Finished difference Result 486 states and 648 transitions. [2022-11-03 02:53:13,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-03 02:53:13,044 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 7.214285714285714) internal successors, (404), 56 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:53:13,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:13,046 INFO L225 Difference]: With dead ends: 486 [2022-11-03 02:53:13,046 INFO L226 Difference]: Without dead ends: 484 [2022-11-03 02:53:13,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 377 SyntacticMatches, 6 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2446 ImplicationChecksByTransitivity, 107.8s TimeCoverageRelationStatistics Valid=1050, Invalid=9858, Unknown=12, NotChecked=0, Total=10920 [2022-11-03 02:53:13,051 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 448 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 616 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:13,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 1986 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 616 Unchecked, 0.4s Time] [2022-11-03 02:53:13,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-11-03 02:53:13,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 448. [2022-11-03 02:53:13,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.3467561521252795) internal successors, (602), 447 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:13,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 602 transitions. [2022-11-03 02:53:13,076 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 602 transitions. Word has length 71 [2022-11-03 02:53:13,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:13,076 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 602 transitions. [2022-11-03 02:53:13,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 7.214285714285714) internal successors, (404), 56 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:13,077 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 602 transitions. [2022-11-03 02:53:13,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:53:13,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:13,079 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:53:13,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:13,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:13,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:13,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:13,710 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:13,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:13,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1631161077, now seen corresponding path program 1 times [2022-11-03 02:53:13,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:13,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1965950901] [2022-11-03 02:53:13,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:13,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:13,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:13,713 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:13,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 02:53:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:14,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:53:14,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:16,262 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:53:16,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:16,262 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:16,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1965950901] [2022-11-03 02:53:16,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1965950901] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:16,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:16,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:53:16,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293090427] [2022-11-03 02:53:16,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:16,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:53:16,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:16,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:53:16,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:53:16,265 INFO L87 Difference]: Start difference. First operand 448 states and 602 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:16,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:16,367 INFO L93 Difference]: Finished difference Result 813 states and 1095 transitions. [2022-11-03 02:53:16,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:53:16,368 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:53:16,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:16,371 INFO L225 Difference]: With dead ends: 813 [2022-11-03 02:53:16,372 INFO L226 Difference]: Without dead ends: 761 [2022-11-03 02:53:16,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:53:16,373 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 11 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:16,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 254 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 109 Unchecked, 0.1s Time] [2022-11-03 02:53:16,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-11-03 02:53:16,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 755. [2022-11-03 02:53:16,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 1.3488063660477454) internal successors, (1017), 754 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:16,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1017 transitions. [2022-11-03 02:53:16,409 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1017 transitions. Word has length 71 [2022-11-03 02:53:16,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:16,410 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1017 transitions. [2022-11-03 02:53:16,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:16,410 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1017 transitions. [2022-11-03 02:53:16,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:53:16,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:16,412 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:53:16,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:16,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:16,640 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:16,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:16,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1516902513, now seen corresponding path program 1 times [2022-11-03 02:53:16,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:16,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733467247] [2022-11-03 02:53:16,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:16,642 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:16,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:16,643 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:16,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 02:53:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:17,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:53:17,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:53:20,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:23,165 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:53:23,165 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:23,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733467247] [2022-11-03 02:53:23,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733467247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:23,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1937200811] [2022-11-03 02:53:23,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:23,166 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:53:23,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:53:23,167 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:53:23,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-03 02:53:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:24,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 02:53:24,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:53:29,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:53:33,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1937200811] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:33,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858285431] [2022-11-03 02:53:33,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:33,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:33,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:33,125 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:33,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-03 02:53:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:33,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-03 02:53:33,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:53:40,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:16,800 WARN L234 SmtUtils]: Spent 6.35s on a formula simplification that was a NOOP. DAG size: 220 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:54:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:54:16,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858285431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:16,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:54:16,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12, 12, 14, 14] total 44 [2022-11-03 02:54:16,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727337896] [2022-11-03 02:54:16,991 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:54:16,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 02:54:16,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:16,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 02:54:16,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1751, Unknown=7, NotChecked=0, Total=1892 [2022-11-03 02:54:16,994 INFO L87 Difference]: Start difference. First operand 755 states and 1017 transitions. Second operand has 44 states, 44 states have (on average 6.9772727272727275) internal successors, (307), 44 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:31,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:31,944 INFO L93 Difference]: Finished difference Result 933 states and 1262 transitions. [2022-11-03 02:54:31,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-03 02:54:31,945 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 6.9772727272727275) internal successors, (307), 44 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:54:31,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:31,949 INFO L225 Difference]: With dead ends: 933 [2022-11-03 02:54:31,949 INFO L226 Difference]: Without dead ends: 931 [2022-11-03 02:54:31,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 378 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 57.4s TimeCoverageRelationStatistics Valid=476, Invalid=4628, Unknown=8, NotChecked=0, Total=5112 [2022-11-03 02:54:31,952 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 196 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 293 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:31,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 1396 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 293 Unchecked, 0.5s Time] [2022-11-03 02:54:31,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-11-03 02:54:31,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 827. [2022-11-03 02:54:31,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 1.3510895883777239) internal successors, (1116), 826 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:31,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1116 transitions. [2022-11-03 02:54:31,994 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1116 transitions. Word has length 71 [2022-11-03 02:54:31,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:31,994 INFO L495 AbstractCegarLoop]: Abstraction has 827 states and 1116 transitions. [2022-11-03 02:54:31,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 6.9772727272727275) internal successors, (307), 44 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:31,995 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1116 transitions. [2022-11-03 02:54:31,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:54:31,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:31,998 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:54:32,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:32,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:32,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:32,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:32,613 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:32,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:32,614 INFO L85 PathProgramCache]: Analyzing trace with hash -725608695, now seen corresponding path program 1 times [2022-11-03 02:54:32,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:32,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381652458] [2022-11-03 02:54:32,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:32,615 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:32,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:32,616 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:32,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 02:54:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:33,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:54:33,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:34,383 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:54:34,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:34,383 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:34,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381652458] [2022-11-03 02:54:34,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381652458] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:34,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:34,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:54:34,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906913051] [2022-11-03 02:54:34,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:34,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:54:34,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:34,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:54:34,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:54:34,386 INFO L87 Difference]: Start difference. First operand 827 states and 1116 transitions. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:34,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:34,583 INFO L93 Difference]: Finished difference Result 1148 states and 1549 transitions. [2022-11-03 02:54:34,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:54:34,591 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:54:34,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:34,595 INFO L225 Difference]: With dead ends: 1148 [2022-11-03 02:54:34,596 INFO L226 Difference]: Without dead ends: 1024 [2022-11-03 02:54:34,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:54:34,597 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 15 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:34,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 218 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2022-11-03 02:54:34,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2022-11-03 02:54:34,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1022. [2022-11-03 02:54:34,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 1.3339862879529873) internal successors, (1362), 1021 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:34,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 1362 transitions. [2022-11-03 02:54:34,649 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 1362 transitions. Word has length 71 [2022-11-03 02:54:34,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:34,649 INFO L495 AbstractCegarLoop]: Abstraction has 1022 states and 1362 transitions. [2022-11-03 02:54:34,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:34,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 1362 transitions. [2022-11-03 02:54:34,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:54:34,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:34,653 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:54:34,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:34,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:34,878 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:34,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:34,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1752470283, now seen corresponding path program 1 times [2022-11-03 02:54:34,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:34,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362088384] [2022-11-03 02:54:34,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:34,880 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:34,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:34,884 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:34,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 02:54:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:35,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:54:35,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:54:38,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:54:41,747 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:41,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362088384] [2022-11-03 02:54:41,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362088384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:41,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1005341892] [2022-11-03 02:54:41,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:41,748 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:54:41,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:54:41,749 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:54:41,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-03 02:54:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:42,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 02:54:42,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:54:57,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:06,879 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:55:06,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1005341892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:06,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491118340] [2022-11-03 02:55:06,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:06,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:55:06,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:55:06,881 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:55:06,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-03 02:55:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:07,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-03 02:55:07,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:55:09,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:17,445 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:55:17,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491118340] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:17,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:55:17,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 13, 13, 14, 14] total 42 [2022-11-03 02:55:17,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389065748] [2022-11-03 02:55:17,446 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:55:17,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 02:55:17,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:55:17,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 02:55:17,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1539, Unknown=3, NotChecked=0, Total=1722 [2022-11-03 02:55:17,448 INFO L87 Difference]: Start difference. First operand 1022 states and 1362 transitions. Second operand has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 42 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:32,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:32,453 INFO L93 Difference]: Finished difference Result 2343 states and 3126 transitions. [2022-11-03 02:55:32,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-03 02:55:32,454 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 42 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:55:32,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:32,461 INFO L225 Difference]: With dead ends: 2343 [2022-11-03 02:55:32,461 INFO L226 Difference]: Without dead ends: 2341 [2022-11-03 02:55:32,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 379 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 42.2s TimeCoverageRelationStatistics Valid=504, Invalid=3525, Unknown=3, NotChecked=0, Total=4032 [2022-11-03 02:55:32,463 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 273 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 426 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:32,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 1178 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 426 Unchecked, 0.3s Time] [2022-11-03 02:55:32,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2022-11-03 02:55:32,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 1638. [2022-11-03 02:55:32,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 1.3359804520464265) internal successors, (2187), 1637 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:32,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 2187 transitions. [2022-11-03 02:55:32,554 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 2187 transitions. Word has length 71 [2022-11-03 02:55:32,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:32,554 INFO L495 AbstractCegarLoop]: Abstraction has 1638 states and 2187 transitions. [2022-11-03 02:55:32,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 42 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:32,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 2187 transitions. [2022-11-03 02:55:32,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:55:32,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:32,559 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:55:32,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2022-11-03 02:55:32,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:32,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:33,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:55:33,178 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:33,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:33,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1862438643, now seen corresponding path program 1 times [2022-11-03 02:55:33,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:55:33,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952970165] [2022-11-03 02:55:33,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:33,181 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:55:33,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:55:33,182 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:55:33,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 02:55:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:33,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:55:33,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:36,575 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:55:36,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:55:39,888 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:55:39,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952970165] [2022-11-03 02:55:39,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952970165] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:39,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [212919777] [2022-11-03 02:55:39,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:39,889 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:55:39,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:55:39,890 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:55:39,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-03 02:55:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:40,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 02:55:40,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:57,014 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:55:57,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:56:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:56:06,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [212919777] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:56:06,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022085087] [2022-11-03 02:56:06,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:56:06,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:56:06,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:56:06,590 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:56:06,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-03 02:56:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:56:06,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-03 02:56:06,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:56:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:56:09,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:56:16,936 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:56:16,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022085087] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:56:16,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:56:16,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 14, 14, 15, 15] total 44 [2022-11-03 02:56:16,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154244528] [2022-11-03 02:56:16,937 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:56:16,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 02:56:16,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:56:16,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 02:56:16,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1693, Unknown=4, NotChecked=0, Total=1892 [2022-11-03 02:56:16,939 INFO L87 Difference]: Start difference. First operand 1638 states and 2187 transitions. Second operand has 44 states, 44 states have (on average 6.318181818181818) internal successors, (278), 44 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:56:32,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:56:32,707 INFO L93 Difference]: Finished difference Result 4137 states and 5492 transitions. [2022-11-03 02:56:32,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-03 02:56:32,707 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 6.318181818181818) internal successors, (278), 44 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:56:32,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:56:32,716 INFO L225 Difference]: With dead ends: 4137 [2022-11-03 02:56:32,716 INFO L226 Difference]: Without dead ends: 4135 [2022-11-03 02:56:32,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 378 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 44.4s TimeCoverageRelationStatistics Valid=442, Invalid=3584, Unknown=6, NotChecked=0, Total=4032 [2022-11-03 02:56:32,718 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 350 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 344 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:56:32,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 1535 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 344 Unchecked, 0.2s Time] [2022-11-03 02:56:32,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4135 states. [2022-11-03 02:56:32,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4135 to 4035. [2022-11-03 02:56:32,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4035 states, 4034 states have (on average 1.3324243926623698) internal successors, (5375), 4034 states have internal predecessors, (5375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:56:32,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4035 states to 4035 states and 5375 transitions. [2022-11-03 02:56:32,925 INFO L78 Accepts]: Start accepts. Automaton has 4035 states and 5375 transitions. Word has length 71 [2022-11-03 02:56:32,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:56:32,925 INFO L495 AbstractCegarLoop]: Abstraction has 4035 states and 5375 transitions. [2022-11-03 02:56:32,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 6.318181818181818) internal successors, (278), 44 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:56:32,926 INFO L276 IsEmpty]: Start isEmpty. Operand 4035 states and 5375 transitions. [2022-11-03 02:56:32,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:56:32,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:56:32,932 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 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] [2022-11-03 02:56:32,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-03 02:56:33,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2022-11-03 02:56:33,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-03 02:56:33,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:56:33,559 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:56:33,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:56:33,560 INFO L85 PathProgramCache]: Analyzing trace with hash -130699119, now seen corresponding path program 1 times [2022-11-03 02:56:33,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:56:33,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416227430] [2022-11-03 02:56:33,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:56:33,561 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:56:33,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:56:33,562 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:56:33,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 02:56:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:56:34,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:56:34,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:56:37,132 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:56:37,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:56:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:56:40,464 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:56:40,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416227430] [2022-11-03 02:56:40,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416227430] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:56:40,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1445500885] [2022-11-03 02:56:40,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:56:40,465 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:56:40,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:56:40,466 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:56:40,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-03 02:56:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:56:41,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-03 02:56:41,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:56:55,563 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:56:55,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:57:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:57:08,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1445500885] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:57:08,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257076296] [2022-11-03 02:57:08,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:57:08,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:57:08,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:57:08,273 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:57:08,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_156b7236-bcd6-4ebd-bbbe-d4f0aa81950b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-03 02:57:08,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:57:08,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:57:08,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:57:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:57:11,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:57:20,781 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:57:20,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257076296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:57:20,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:57:20,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 14, 14, 15, 15] total 44 [2022-11-03 02:57:20,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202525237] [2022-11-03 02:57:20,782 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:57:20,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 02:57:20,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:57:20,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 02:57:20,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1701, Unknown=3, NotChecked=0, Total=1892 [2022-11-03 02:57:20,784 INFO L87 Difference]: Start difference. First operand 4035 states and 5375 transitions. Second operand has 44 states, 44 states have (on average 6.318181818181818) internal successors, (278), 44 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)