./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 01a21536345230b7194ff5017879c469eb8be909ba72352bb81feb2f101a934f --- 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-2329fc7 [2022-12-14 11:15:27,596 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:15:27,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:15:27,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:15:27,618 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:15:27,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:15:27,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:15:27,622 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:15:27,623 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:15:27,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:15:27,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:15:27,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:15:27,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:15:27,627 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:15:27,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:15:27,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:15:27,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:15:27,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:15:27,632 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:15:27,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:15:27,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:15:27,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:15:27,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:15:27,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:15:27,642 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:15:27,642 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:15:27,642 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:15:27,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:15:27,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:15:27,644 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:15:27,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:15:27,645 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:15:27,646 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:15:27,647 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:15:27,648 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:15:27,648 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:15:27,649 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:15:27,649 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:15:27,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:15:27,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:15:27,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:15:27,651 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:15:27,674 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:15:27,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:15:27,675 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:15:27,675 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:15:27,676 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:15:27,676 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:15:27,676 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:15:27,676 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:15:27,676 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:15:27,677 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:15:27,677 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:15:27,677 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:15:27,677 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:15:27,677 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:15:27,677 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:15:27,678 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:15:27,678 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:15:27,678 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:15:27,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:15:27,679 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:15:27,679 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:15:27,679 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:15:27,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:15:27,680 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:15:27,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:15:27,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:15:27,680 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:15:27,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:15:27,680 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:15:27,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:15:27,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:15:27,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:15:27,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:15:27,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:15:27,681 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:15:27,682 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:15:27,682 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:15:27,682 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:15:27,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:15:27,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:15:27,682 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:15:27,683 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_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 01a21536345230b7194ff5017879c469eb8be909ba72352bb81feb2f101a934f [2022-12-14 11:15:27,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:15:27,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:15:27,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:15:27,894 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:15:27,895 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:15:27,896 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.UNBOUNDED.pals.c [2022-12-14 11:15:30,514 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:15:30,692 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:15:30,693 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.UNBOUNDED.pals.c [2022-12-14 11:15:30,701 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/data/dbbe8e92d/d8ac51ddb1ee4478819012066883566f/FLAGc9e12035a [2022-12-14 11:15:30,714 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/data/dbbe8e92d/d8ac51ddb1ee4478819012066883566f [2022-12-14 11:15:30,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:15:30,717 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:15:30,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:15:30,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:15:30,720 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:15:30,721 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:15:30" (1/1) ... [2022-12-14 11:15:30,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31bcae05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:30, skipping insertion in model container [2022-12-14 11:15:30,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:15:30" (1/1) ... [2022-12-14 11:15:30,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:15:30,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:15:30,959 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.UNBOUNDED.pals.c[14684,14697] [2022-12-14 11:15:30,963 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:15:30,975 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:15:31,030 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.UNBOUNDED.pals.c[14684,14697] [2022-12-14 11:15:31,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:15:31,047 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:15:31,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:31 WrapperNode [2022-12-14 11:15:31,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:15:31,048 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:15:31,048 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:15:31,049 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:15:31,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:31" (1/1) ... [2022-12-14 11:15:31,067 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:31" (1/1) ... [2022-12-14 11:15:31,099 INFO L138 Inliner]: procedures = 32, calls = 48, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 479 [2022-12-14 11:15:31,099 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:15:31,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:15:31,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:15:31,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:15:31,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:31" (1/1) ... [2022-12-14 11:15:31,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:31" (1/1) ... [2022-12-14 11:15:31,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:31" (1/1) ... [2022-12-14 11:15:31,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:31" (1/1) ... [2022-12-14 11:15:31,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:31" (1/1) ... [2022-12-14 11:15:31,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:31" (1/1) ... [2022-12-14 11:15:31,131 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:31" (1/1) ... [2022-12-14 11:15:31,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:31" (1/1) ... [2022-12-14 11:15:31,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:15:31,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:15:31,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:15:31,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:15:31,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:31" (1/1) ... [2022-12-14 11:15:31,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:15:31,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:15:31,168 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:15:31,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:15:31,203 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2022-12-14 11:15:31,204 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2022-12-14 11:15:31,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:15:31,204 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2022-12-14 11:15:31,204 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2022-12-14 11:15:31,204 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-12-14 11:15:31,204 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-12-14 11:15:31,204 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2022-12-14 11:15:31,205 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2022-12-14 11:15:31,205 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 11:15:31,205 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 11:15:31,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:15:31,205 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2022-12-14 11:15:31,205 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2022-12-14 11:15:31,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:15:31,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:15:31,206 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2022-12-14 11:15:31,206 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2022-12-14 11:15:31,296 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:15:31,299 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:15:31,707 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:15:31,787 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:15:31,787 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 11:15:31,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:15:31 BoogieIcfgContainer [2022-12-14 11:15:31,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:15:31,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:15:31,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:15:31,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:15:31,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:15:30" (1/3) ... [2022-12-14 11:15:31,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@153e9175 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:15:31, skipping insertion in model container [2022-12-14 11:15:31,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:31" (2/3) ... [2022-12-14 11:15:31,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@153e9175 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:15:31, skipping insertion in model container [2022-12-14 11:15:31,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:15:31" (3/3) ... [2022-12-14 11:15:31,796 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.4_2.ufo.UNBOUNDED.pals.c [2022-12-14 11:15:31,809 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:15:31,810 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 11:15:31,854 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:15:31,861 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;@31c8cf5c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:15:31,861 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 11:15:31,865 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 109 states have (on average 1.5412844036697249) internal successors, (168), 111 states have internal predecessors, (168), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-12-14 11:15:31,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 11:15:31,872 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:31,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:15:31,872 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:31,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:31,877 INFO L85 PathProgramCache]: Analyzing trace with hash 940025637, now seen corresponding path program 1 times [2022-12-14 11:15:31,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:31,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755086207] [2022-12-14 11:15:31,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:31,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:15:32,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:32,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755086207] [2022-12-14 11:15:32,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755086207] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:32,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:32,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:15:32,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700800126] [2022-12-14 11:15:32,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:32,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:15:32,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:32,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:15:32,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:15:32,227 INFO L87 Difference]: Start difference. First operand has 149 states, 109 states have (on average 1.5412844036697249) internal successors, (168), 111 states have internal predecessors, (168), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:15:32,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:32,333 INFO L93 Difference]: Finished difference Result 298 states and 487 transitions. [2022-12-14 11:15:32,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:15:32,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-12-14 11:15:32,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:32,343 INFO L225 Difference]: With dead ends: 298 [2022-12-14 11:15:32,343 INFO L226 Difference]: Without dead ends: 152 [2022-12-14 11:15:32,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:15:32,348 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 5 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:32,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 635 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:15:32,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-12-14 11:15:32,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-12-14 11:15:32,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 112 states have (on average 1.5089285714285714) internal successors, (169), 113 states have internal predecessors, (169), 31 states have call successors, (31), 8 states have call predecessors, (31), 8 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-12-14 11:15:32,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 231 transitions. [2022-12-14 11:15:32,385 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 231 transitions. Word has length 19 [2022-12-14 11:15:32,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:32,386 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 231 transitions. [2022-12-14 11:15:32,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:15:32,386 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 231 transitions. [2022-12-14 11:15:32,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 11:15:32,387 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:32,387 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] [2022-12-14 11:15:32,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 11:15:32,388 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:32,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:32,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1579928659, now seen corresponding path program 1 times [2022-12-14 11:15:32,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:32,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580044892] [2022-12-14 11:15:32,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:32,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:15:32,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:32,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580044892] [2022-12-14 11:15:32,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580044892] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:32,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:32,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 11:15:32,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587482107] [2022-12-14 11:15:32,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:32,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:15:32,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:32,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:15:32,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:15:32,521 INFO L87 Difference]: Start difference. First operand 152 states and 231 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 11:15:32,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:32,790 INFO L93 Difference]: Finished difference Result 432 states and 672 transitions. [2022-12-14 11:15:32,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:15:32,790 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2022-12-14 11:15:32,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:32,793 INFO L225 Difference]: With dead ends: 432 [2022-12-14 11:15:32,793 INFO L226 Difference]: Without dead ends: 283 [2022-12-14 11:15:32,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:15:32,795 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 570 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:32,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 593 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:15:32,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-12-14 11:15:32,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 186. [2022-12-14 11:15:32,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 141 states have (on average 1.5106382978723405) internal successors, (213), 141 states have internal predecessors, (213), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 11:15:32,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 281 transitions. [2022-12-14 11:15:32,823 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 281 transitions. Word has length 30 [2022-12-14 11:15:32,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:32,823 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 281 transitions. [2022-12-14 11:15:32,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 11:15:32,823 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 281 transitions. [2022-12-14 11:15:32,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 11:15:32,824 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:32,824 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:15:32,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 11:15:32,825 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:32,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:32,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2031615976, now seen corresponding path program 1 times [2022-12-14 11:15:32,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:32,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253886441] [2022-12-14 11:15:32,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:32,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:15:32,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:32,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253886441] [2022-12-14 11:15:32,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253886441] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:32,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:32,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 11:15:32,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4971596] [2022-12-14 11:15:32,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:32,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:15:32,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:32,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:15:32,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:15:32,924 INFO L87 Difference]: Start difference. First operand 186 states and 281 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 11:15:33,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:33,166 INFO L93 Difference]: Finished difference Result 432 states and 670 transitions. [2022-12-14 11:15:33,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:15:33,167 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2022-12-14 11:15:33,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:33,168 INFO L225 Difference]: With dead ends: 432 [2022-12-14 11:15:33,168 INFO L226 Difference]: Without dead ends: 283 [2022-12-14 11:15:33,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:15:33,170 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 566 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:33,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 596 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:15:33,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-12-14 11:15:33,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 186. [2022-12-14 11:15:33,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 141 states have (on average 1.50354609929078) internal successors, (212), 141 states have internal predecessors, (212), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 11:15:33,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 280 transitions. [2022-12-14 11:15:33,187 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 280 transitions. Word has length 31 [2022-12-14 11:15:33,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:33,187 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 280 transitions. [2022-12-14 11:15:33,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 11:15:33,188 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 280 transitions. [2022-12-14 11:15:33,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 11:15:33,188 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:33,188 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] [2022-12-14 11:15:33,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 11:15:33,189 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:33,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:33,189 INFO L85 PathProgramCache]: Analyzing trace with hash 221392883, now seen corresponding path program 1 times [2022-12-14 11:15:33,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:33,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76182828] [2022-12-14 11:15:33,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:33,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:15:33,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:33,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76182828] [2022-12-14 11:15:33,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76182828] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:33,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:33,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:15:33,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215526338] [2022-12-14 11:15:33,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:33,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:15:33,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:33,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:15:33,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:15:33,306 INFO L87 Difference]: Start difference. First operand 186 states and 280 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 11:15:33,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:33,357 INFO L93 Difference]: Finished difference Result 340 states and 514 transitions. [2022-12-14 11:15:33,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:15:33,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2022-12-14 11:15:33,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:33,359 INFO L225 Difference]: With dead ends: 340 [2022-12-14 11:15:33,359 INFO L226 Difference]: Without dead ends: 191 [2022-12-14 11:15:33,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:15:33,361 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 6 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:33,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 647 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:15:33,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-12-14 11:15:33,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-12-14 11:15:33,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 145 states have (on average 1.4896551724137932) internal successors, (216), 145 states have internal predecessors, (216), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 11:15:33,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 284 transitions. [2022-12-14 11:15:33,373 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 284 transitions. Word has length 33 [2022-12-14 11:15:33,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:33,374 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 284 transitions. [2022-12-14 11:15:33,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 11:15:33,374 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 284 transitions. [2022-12-14 11:15:33,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 11:15:33,375 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:33,375 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, 1, 1, 1] [2022-12-14 11:15:33,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 11:15:33,376 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:33,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:33,376 INFO L85 PathProgramCache]: Analyzing trace with hash 611086105, now seen corresponding path program 1 times [2022-12-14 11:15:33,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:33,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129654262] [2022-12-14 11:15:33,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:33,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:15:33,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:33,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129654262] [2022-12-14 11:15:33,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129654262] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:33,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:33,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:15:33,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577527654] [2022-12-14 11:15:33,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:33,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:15:33,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:33,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:15:33,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:15:33,497 INFO L87 Difference]: Start difference. First operand 191 states and 284 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 11:15:33,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:33,557 INFO L93 Difference]: Finished difference Result 350 states and 525 transitions. [2022-12-14 11:15:33,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:15:33,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2022-12-14 11:15:33,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:33,560 INFO L225 Difference]: With dead ends: 350 [2022-12-14 11:15:33,560 INFO L226 Difference]: Without dead ends: 196 [2022-12-14 11:15:33,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:15:33,561 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 6 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:33,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 633 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:15:33,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-12-14 11:15:33,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-12-14 11:15:33,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 149 states have (on average 1.476510067114094) internal successors, (220), 149 states have internal predecessors, (220), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 11:15:33,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 288 transitions. [2022-12-14 11:15:33,572 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 288 transitions. Word has length 41 [2022-12-14 11:15:33,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:33,573 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 288 transitions. [2022-12-14 11:15:33,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 11:15:33,573 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 288 transitions. [2022-12-14 11:15:33,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 11:15:33,575 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:33,575 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:15:33,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 11:15:33,576 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:33,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:33,576 INFO L85 PathProgramCache]: Analyzing trace with hash 36466403, now seen corresponding path program 1 times [2022-12-14 11:15:33,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:33,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722108979] [2022-12-14 11:15:33,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:33,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:15:33,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:33,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722108979] [2022-12-14 11:15:33,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722108979] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:33,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:33,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:15:33,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716215017] [2022-12-14 11:15:33,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:33,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:15:33,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:33,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:15:33,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:15:33,679 INFO L87 Difference]: Start difference. First operand 196 states and 288 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 11:15:33,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:33,732 INFO L93 Difference]: Finished difference Result 359 states and 529 transitions. [2022-12-14 11:15:33,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:15:33,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2022-12-14 11:15:33,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:33,734 INFO L225 Difference]: With dead ends: 359 [2022-12-14 11:15:33,734 INFO L226 Difference]: Without dead ends: 200 [2022-12-14 11:15:33,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:15:33,735 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 5 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:33,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 642 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:15:33,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-12-14 11:15:33,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-12-14 11:15:33,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 152 states have (on average 1.4671052631578947) internal successors, (223), 152 states have internal predecessors, (223), 34 states have call successors, (34), 13 states have call predecessors, (34), 13 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 11:15:33,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 291 transitions. [2022-12-14 11:15:33,747 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 291 transitions. Word has length 49 [2022-12-14 11:15:33,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:33,747 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 291 transitions. [2022-12-14 11:15:33,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 11:15:33,747 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 291 transitions. [2022-12-14 11:15:33,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 11:15:33,748 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:33,748 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:15:33,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 11:15:33,748 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:33,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:33,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1862041590, now seen corresponding path program 1 times [2022-12-14 11:15:33,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:33,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243769389] [2022-12-14 11:15:33,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:33,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:15:33,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:33,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243769389] [2022-12-14 11:15:33,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243769389] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:33,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:33,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:15:33,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833777184] [2022-12-14 11:15:33,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:33,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:15:33,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:33,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:15:33,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:15:33,889 INFO L87 Difference]: Start difference. First operand 200 states and 291 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 11:15:33,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:33,955 INFO L93 Difference]: Finished difference Result 368 states and 539 transitions. [2022-12-14 11:15:33,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:15:33,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2022-12-14 11:15:33,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:33,956 INFO L225 Difference]: With dead ends: 368 [2022-12-14 11:15:33,957 INFO L226 Difference]: Without dead ends: 205 [2022-12-14 11:15:33,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:15:33,958 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 6 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:33,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 633 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:15:33,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-12-14 11:15:33,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-12-14 11:15:33,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 156 states have (on average 1.455128205128205) internal successors, (227), 156 states have internal predecessors, (227), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 11:15:33,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 295 transitions. [2022-12-14 11:15:33,969 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 295 transitions. Word has length 49 [2022-12-14 11:15:33,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:33,969 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 295 transitions. [2022-12-14 11:15:33,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 11:15:33,969 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 295 transitions. [2022-12-14 11:15:33,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 11:15:33,970 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:33,970 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:15:33,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 11:15:33,970 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:33,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:33,971 INFO L85 PathProgramCache]: Analyzing trace with hash 2131134058, now seen corresponding path program 1 times [2022-12-14 11:15:33,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:33,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757668775] [2022-12-14 11:15:33,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:33,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 11:15:34,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:34,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757668775] [2022-12-14 11:15:34,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757668775] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:34,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:34,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:15:34,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71529151] [2022-12-14 11:15:34,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:34,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:15:34,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:34,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:15:34,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:15:34,088 INFO L87 Difference]: Start difference. First operand 205 states and 295 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 11:15:34,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:34,136 INFO L93 Difference]: Finished difference Result 379 states and 546 transitions. [2022-12-14 11:15:34,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:15:34,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 57 [2022-12-14 11:15:34,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:34,137 INFO L225 Difference]: With dead ends: 379 [2022-12-14 11:15:34,137 INFO L226 Difference]: Without dead ends: 211 [2022-12-14 11:15:34,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:15:34,138 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 7 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:34,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 644 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:15:34,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-12-14 11:15:34,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-12-14 11:15:34,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 161 states have (on average 1.4409937888198758) internal successors, (232), 161 states have internal predecessors, (232), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 11:15:34,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 300 transitions. [2022-12-14 11:15:34,149 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 300 transitions. Word has length 57 [2022-12-14 11:15:34,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:34,150 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 300 transitions. [2022-12-14 11:15:34,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 11:15:34,150 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 300 transitions. [2022-12-14 11:15:34,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 11:15:34,151 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:34,151 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:15:34,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 11:15:34,151 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:34,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:34,151 INFO L85 PathProgramCache]: Analyzing trace with hash -180629249, now seen corresponding path program 1 times [2022-12-14 11:15:34,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:34,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086429495] [2022-12-14 11:15:34,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:34,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:34,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 11:15:34,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:34,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086429495] [2022-12-14 11:15:34,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086429495] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:15:34,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239450640] [2022-12-14 11:15:34,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:34,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:15:34,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:15:34,460 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:15:34,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:15:34,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:34,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 11:15:34,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:15:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:15:34,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:15:34,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239450640] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:34,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:15:34,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2022-12-14 11:15:34,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181503612] [2022-12-14 11:15:34,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:34,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:15:34,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:34,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:15:34,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-12-14 11:15:34,757 INFO L87 Difference]: Start difference. First operand 211 states and 300 transitions. Second operand has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 11:15:34,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:34,997 INFO L93 Difference]: Finished difference Result 598 states and 836 transitions. [2022-12-14 11:15:34,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 11:15:34,997 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 60 [2022-12-14 11:15:34,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:35,000 INFO L225 Difference]: With dead ends: 598 [2022-12-14 11:15:35,000 INFO L226 Difference]: Without dead ends: 398 [2022-12-14 11:15:35,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-12-14 11:15:35,001 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 212 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:35,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1160 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:15:35,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-12-14 11:15:35,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 395. [2022-12-14 11:15:35,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 299 states have (on average 1.4214046822742474) internal successors, (425), 300 states have internal predecessors, (425), 65 states have call successors, (65), 30 states have call predecessors, (65), 30 states have return successors, (65), 64 states have call predecessors, (65), 65 states have call successors, (65) [2022-12-14 11:15:35,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 555 transitions. [2022-12-14 11:15:35,034 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 555 transitions. Word has length 60 [2022-12-14 11:15:35,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:35,034 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 555 transitions. [2022-12-14 11:15:35,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 11:15:35,034 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 555 transitions. [2022-12-14 11:15:35,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 11:15:35,035 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:35,036 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:15:35,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:15:35,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 11:15:35,236 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:35,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:35,237 INFO L85 PathProgramCache]: Analyzing trace with hash 361908346, now seen corresponding path program 1 times [2022-12-14 11:15:35,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:35,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092856678] [2022-12-14 11:15:35,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:35,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 11:15:35,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:35,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092856678] [2022-12-14 11:15:35,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092856678] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:15:35,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745787088] [2022-12-14 11:15:35,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:35,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:15:35,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:15:35,485 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:15:35,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 11:15:35,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:35,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:15:35,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:15:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:15:35,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:15:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 11:15:35,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745787088] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:15:35,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1047823433] [2022-12-14 11:15:35,985 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2022-12-14 11:15:35,986 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:15:35,988 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:15:35,992 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:15:35,992 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:15:38,687 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-12-14 11:15:38,723 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 11:15:38,754 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 11:15:38,831 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:15:50,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1047823433] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:50,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:15:50,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [9, 9, 9] total 36 [2022-12-14 11:15:50,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045780329] [2022-12-14 11:15:50,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:50,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 11:15:50,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:50,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 11:15:50,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 11:15:50,535 INFO L87 Difference]: Start difference. First operand 395 states and 555 transitions. Second operand has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 11:15:54,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:54,933 INFO L93 Difference]: Finished difference Result 819 states and 1158 transitions. [2022-12-14 11:15:54,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 11:15:54,934 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 62 [2022-12-14 11:15:54,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:54,936 INFO L225 Difference]: With dead ends: 819 [2022-12-14 11:15:54,937 INFO L226 Difference]: Without dead ends: 464 [2022-12-14 11:15:54,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 151 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 11:15:54,938 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 120 mSDsluCounter, 2869 mSDsCounter, 0 mSdLazyCounter, 1885 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 3150 SdHoareTripleChecker+Invalid, 1910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:54,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 3150 Invalid, 1910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1885 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-12-14 11:15:54,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-12-14 11:15:54,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 441. [2022-12-14 11:15:54,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 330 states have (on average 1.4) internal successors, (462), 331 states have internal predecessors, (462), 78 states have call successors, (78), 32 states have call predecessors, (78), 32 states have return successors, (78), 77 states have call predecessors, (78), 78 states have call successors, (78) [2022-12-14 11:15:54,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 618 transitions. [2022-12-14 11:15:54,988 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 618 transitions. Word has length 62 [2022-12-14 11:15:54,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:54,988 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 618 transitions. [2022-12-14 11:15:54,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 11:15:54,988 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 618 transitions. [2022-12-14 11:15:54,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 11:15:54,989 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:54,989 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:15:54,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 11:15:55,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:15:55,190 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:55,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:55,191 INFO L85 PathProgramCache]: Analyzing trace with hash 2121358426, now seen corresponding path program 1 times [2022-12-14 11:15:55,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:55,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515512256] [2022-12-14 11:15:55,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:55,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:55,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 11:15:55,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:55,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515512256] [2022-12-14 11:15:55,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515512256] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:15:55,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466973371] [2022-12-14 11:15:55,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:55,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:15:55,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:15:55,516 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:15:55,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 11:15:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:55,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:15:55,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:15:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:15:55,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:15:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 11:15:55,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466973371] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:15:55,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1649840607] [2022-12-14 11:15:55,872 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2022-12-14 11:15:55,872 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:15:55,872 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:15:55,872 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:15:55,872 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:15:57,390 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-12-14 11:15:57,412 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 11:15:57,428 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 11:15:57,471 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:16:10,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1649840607] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:16:10,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:16:10,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [9, 9, 9] total 36 [2022-12-14 11:16:10,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645874754] [2022-12-14 11:16:10,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:16:10,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 11:16:10,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:16:10,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 11:16:10,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 11:16:10,967 INFO L87 Difference]: Start difference. First operand 441 states and 618 transitions. Second operand has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 11:16:15,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:16:15,768 INFO L93 Difference]: Finished difference Result 888 states and 1254 transitions. [2022-12-14 11:16:15,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 11:16:15,769 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 62 [2022-12-14 11:16:15,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:16:15,771 INFO L225 Difference]: With dead ends: 888 [2022-12-14 11:16:15,771 INFO L226 Difference]: Without dead ends: 522 [2022-12-14 11:16:15,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 154 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=178, Invalid=1154, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 11:16:15,772 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 77 mSDsluCounter, 3029 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 3319 SdHoareTripleChecker+Invalid, 2070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:16:15,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 3319 Invalid, 2070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2060 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-12-14 11:16:15,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-12-14 11:16:15,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 499. [2022-12-14 11:16:15,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 371 states have (on average 1.371967654986523) internal successors, (509), 372 states have internal predecessors, (509), 92 states have call successors, (92), 35 states have call predecessors, (92), 35 states have return successors, (92), 91 states have call predecessors, (92), 92 states have call successors, (92) [2022-12-14 11:16:15,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 693 transitions. [2022-12-14 11:16:15,837 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 693 transitions. Word has length 62 [2022-12-14 11:16:15,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:16:15,838 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 693 transitions. [2022-12-14 11:16:15,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 11:16:15,838 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 693 transitions. [2022-12-14 11:16:15,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 11:16:15,838 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:16:15,839 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:16:15,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 11:16:16,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 11:16:16,040 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:16:16,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:16:16,040 INFO L85 PathProgramCache]: Analyzing trace with hash 663906581, now seen corresponding path program 1 times [2022-12-14 11:16:16,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:16:16,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247602664] [2022-12-14 11:16:16,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:16,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:16:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 11:16:16,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:16:16,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247602664] [2022-12-14 11:16:16,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247602664] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:16:16,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303805203] [2022-12-14 11:16:16,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:16,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:16:16,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:16:16,260 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:16:16,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 11:16:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:16,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:16:16,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:16:16,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:16:16,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:16:16,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 11:16:16,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303805203] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:16:16,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [203392049] [2022-12-14 11:16:16,660 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2022-12-14 11:16:16,660 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:16:16,661 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:16:16,661 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:16:16,661 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:16:18,721 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-12-14 11:16:18,742 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 11:16:18,757 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-12-14 11:16:18,799 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:16:33,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [203392049] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:16:33,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:16:33,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [9, 9, 9] total 38 [2022-12-14 11:16:33,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719759772] [2022-12-14 11:16:33,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:16:33,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 11:16:33,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:16:33,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 11:16:33,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 11:16:33,444 INFO L87 Difference]: Start difference. First operand 499 states and 693 transitions. Second operand has 27 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 11:16:40,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:16:40,097 INFO L93 Difference]: Finished difference Result 923 states and 1299 transitions. [2022-12-14 11:16:40,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 11:16:40,098 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 64 [2022-12-14 11:16:40,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:16:40,102 INFO L225 Difference]: With dead ends: 923 [2022-12-14 11:16:40,102 INFO L226 Difference]: Without dead ends: 568 [2022-12-14 11:16:40,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 156 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 11:16:40,105 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 131 mSDsluCounter, 4627 mSDsCounter, 0 mSdLazyCounter, 3009 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 4946 SdHoareTripleChecker+Invalid, 3040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 3009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-12-14 11:16:40,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 4946 Invalid, 3040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 3009 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-12-14 11:16:40,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-12-14 11:16:40,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 519. [2022-12-14 11:16:40,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 385 states have (on average 1.3532467532467531) internal successors, (521), 386 states have internal predecessors, (521), 97 states have call successors, (97), 36 states have call predecessors, (97), 36 states have return successors, (97), 96 states have call predecessors, (97), 97 states have call successors, (97) [2022-12-14 11:16:40,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 715 transitions. [2022-12-14 11:16:40,236 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 715 transitions. Word has length 64 [2022-12-14 11:16:40,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:16:40,236 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 715 transitions. [2022-12-14 11:16:40,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 11:16:40,236 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 715 transitions. [2022-12-14 11:16:40,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 11:16:40,237 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:16:40,237 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:16:40,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 11:16:40,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 11:16:40,438 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:16:40,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:16:40,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1746566064, now seen corresponding path program 1 times [2022-12-14 11:16:40,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:16:40,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078546545] [2022-12-14 11:16:40,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:40,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:16:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:16:40,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:16:40,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078546545] [2022-12-14 11:16:40,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078546545] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:16:40,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:16:40,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:16:40,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629403177] [2022-12-14 11:16:40,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:16:40,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:16:40,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:16:40,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:16:40,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:16:40,551 INFO L87 Difference]: Start difference. First operand 519 states and 715 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 11:16:40,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:16:40,703 INFO L93 Difference]: Finished difference Result 930 states and 1308 transitions. [2022-12-14 11:16:40,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:16:40,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 66 [2022-12-14 11:16:40,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:16:40,706 INFO L225 Difference]: With dead ends: 930 [2022-12-14 11:16:40,706 INFO L226 Difference]: Without dead ends: 527 [2022-12-14 11:16:40,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:16:40,708 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 5 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:16:40,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 642 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:16:40,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-12-14 11:16:40,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 527. [2022-12-14 11:16:40,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 391 states have (on average 1.3478260869565217) internal successors, (527), 392 states have internal predecessors, (527), 97 states have call successors, (97), 38 states have call predecessors, (97), 38 states have return successors, (97), 96 states have call predecessors, (97), 97 states have call successors, (97) [2022-12-14 11:16:40,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 721 transitions. [2022-12-14 11:16:40,792 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 721 transitions. Word has length 66 [2022-12-14 11:16:40,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:16:40,793 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 721 transitions. [2022-12-14 11:16:40,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 11:16:40,793 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 721 transitions. [2022-12-14 11:16:40,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 11:16:40,794 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:16:40,794 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:16:40,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 11:16:40,794 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:16:40,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:16:40,794 INFO L85 PathProgramCache]: Analyzing trace with hash 772289194, now seen corresponding path program 1 times [2022-12-14 11:16:40,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:16:40,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831330102] [2022-12-14 11:16:40,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:40,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:16:40,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 11:16:41,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:16:41,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831330102] [2022-12-14 11:16:41,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831330102] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:16:41,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217025717] [2022-12-14 11:16:41,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:41,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:16:41,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:16:41,013 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:16:41,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:16:41,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:41,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:16:41,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:16:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:16:41,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:16:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 11:16:41,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217025717] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:16:41,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [290406169] [2022-12-14 11:16:41,331 INFO L159 IcfgInterpreter]: Started Sifa with 60 locations of interest [2022-12-14 11:16:41,331 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:16:41,331 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:16:41,331 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:16:41,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:16:45,204 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 231 for LOIs [2022-12-14 11:16:45,469 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 11:16:45,485 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 192 for LOIs [2022-12-14 11:16:45,605 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 154 for LOIs [2022-12-14 11:16:45,639 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 151 for LOIs [2022-12-14 11:16:45,682 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 11:16:45,725 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:17:18,879 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16602#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s1p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (not (= (mod ~side1Failed~0 256) 0)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~s1s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (= assert_~arg |assert_#in~arg|) (not (= (mod ~side1Failed_History_1~0 256) 0)) (= ~s2s2~0 0) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (<= 0 ~manual_selection_History_2~0) (= (mod ~side2Failed_History_1~0 256) 0) (= ~side2_written~0 0) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (= ~s2p_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~s1s1_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (<= ~manual_selection_History_2~0 0) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= ~s2p~0 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-12-14 11:17:18,879 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:17:18,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:17:18,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-12-14 11:17:18,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859209149] [2022-12-14 11:17:18,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:17:18,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 11:17:18,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:18,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 11:17:18,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2707, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 11:17:18,883 INFO L87 Difference]: Start difference. First operand 527 states and 721 transitions. Second operand has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-12-14 11:17:19,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:19,325 INFO L93 Difference]: Finished difference Result 1268 states and 1770 transitions. [2022-12-14 11:17:19,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 11:17:19,326 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 70 [2022-12-14 11:17:19,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:19,329 INFO L225 Difference]: With dead ends: 1268 [2022-12-14 11:17:19,329 INFO L226 Difference]: Without dead ends: 873 [2022-12-14 11:17:19,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 150 SyntacticMatches, 15 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=287, Invalid=3253, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 11:17:19,330 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 303 mSDsluCounter, 2197 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 2542 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:19,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 2542 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:17:19,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-12-14 11:17:19,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 549. [2022-12-14 11:17:19,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 406 states have (on average 1.3103448275862069) internal successors, (532), 409 states have internal predecessors, (532), 95 states have call successors, (95), 47 states have call predecessors, (95), 47 states have return successors, (95), 92 states have call predecessors, (95), 95 states have call successors, (95) [2022-12-14 11:17:19,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 722 transitions. [2022-12-14 11:17:19,432 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 722 transitions. Word has length 70 [2022-12-14 11:17:19,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:19,432 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 722 transitions. [2022-12-14 11:17:19,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-12-14 11:17:19,432 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 722 transitions. [2022-12-14 11:17:19,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 11:17:19,433 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:19,433 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:17:19,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 11:17:19,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:17:19,635 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:19,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:19,635 INFO L85 PathProgramCache]: Analyzing trace with hash 220483239, now seen corresponding path program 1 times [2022-12-14 11:17:19,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:19,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358746888] [2022-12-14 11:17:19,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:19,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 11:17:19,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:19,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358746888] [2022-12-14 11:17:19,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358746888] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:19,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:17:19,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 11:17:19,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386683813] [2022-12-14 11:17:19,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:19,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:17:19,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:19,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:17:19,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:17:19,866 INFO L87 Difference]: Start difference. First operand 549 states and 722 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:17:20,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:20,443 INFO L93 Difference]: Finished difference Result 1207 states and 1671 transitions. [2022-12-14 11:17:20,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:17:20,444 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 71 [2022-12-14 11:17:20,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:20,448 INFO L225 Difference]: With dead ends: 1207 [2022-12-14 11:17:20,448 INFO L226 Difference]: Without dead ends: 896 [2022-12-14 11:17:20,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-12-14 11:17:20,449 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 670 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:20,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 1647 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:17:20,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-12-14 11:17:20,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 683. [2022-12-14 11:17:20,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 503 states have (on average 1.312127236580517) internal successors, (660), 506 states have internal predecessors, (660), 119 states have call successors, (119), 60 states have call predecessors, (119), 60 states have return successors, (119), 116 states have call predecessors, (119), 119 states have call successors, (119) [2022-12-14 11:17:20,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 898 transitions. [2022-12-14 11:17:20,633 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 898 transitions. Word has length 71 [2022-12-14 11:17:20,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:20,633 INFO L495 AbstractCegarLoop]: Abstraction has 683 states and 898 transitions. [2022-12-14 11:17:20,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:17:20,634 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 898 transitions. [2022-12-14 11:17:20,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 11:17:20,634 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:20,635 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:17:20,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 11:17:20,635 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:20,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:20,635 INFO L85 PathProgramCache]: Analyzing trace with hash 210288124, now seen corresponding path program 1 times [2022-12-14 11:17:20,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:20,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105983400] [2022-12-14 11:17:20,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:20,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:20,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:20,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 11:17:20,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:20,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105983400] [2022-12-14 11:17:20,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105983400] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:20,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:17:20,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 11:17:20,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614270465] [2022-12-14 11:17:20,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:20,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:17:20,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:20,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:17:20,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:17:20,810 INFO L87 Difference]: Start difference. First operand 683 states and 898 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 11:17:21,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:21,542 INFO L93 Difference]: Finished difference Result 1582 states and 2191 transitions. [2022-12-14 11:17:21,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:17:21,543 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 73 [2022-12-14 11:17:21,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:21,546 INFO L225 Difference]: With dead ends: 1582 [2022-12-14 11:17:21,546 INFO L226 Difference]: Without dead ends: 1241 [2022-12-14 11:17:21,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-12-14 11:17:21,547 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 599 mSDsluCounter, 1807 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 2321 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:21,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 2321 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:17:21,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2022-12-14 11:17:21,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 950. [2022-12-14 11:17:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 695 states have (on average 1.3237410071942446) internal successors, (920), 700 states have internal predecessors, (920), 169 states have call successors, (169), 85 states have call predecessors, (169), 85 states have return successors, (169), 164 states have call predecessors, (169), 169 states have call successors, (169) [2022-12-14 11:17:21,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1258 transitions. [2022-12-14 11:17:21,747 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1258 transitions. Word has length 73 [2022-12-14 11:17:21,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:21,748 INFO L495 AbstractCegarLoop]: Abstraction has 950 states and 1258 transitions. [2022-12-14 11:17:21,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 11:17:21,748 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1258 transitions. [2022-12-14 11:17:21,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 11:17:21,748 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:21,749 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:17:21,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 11:17:21,749 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:21,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:21,749 INFO L85 PathProgramCache]: Analyzing trace with hash -345143512, now seen corresponding path program 1 times [2022-12-14 11:17:21,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:21,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589229309] [2022-12-14 11:17:21,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:21,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:21,928 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 11:17:21,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:21,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589229309] [2022-12-14 11:17:21,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589229309] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:17:21,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801129092] [2022-12-14 11:17:21,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:21,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:17:21,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:17:21,930 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:17:21,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 11:17:22,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:22,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 11:17:22,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:17:22,101 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 11:17:22,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:17:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 11:17:22,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801129092] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:17:22,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1373979382] [2022-12-14 11:17:22,197 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-12-14 11:17:22,197 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:17:22,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:17:22,198 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:17:22,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:17:25,137 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-12-14 11:17:25,159 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 11:17:25,175 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-12-14 11:17:25,241 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 11:17:25,284 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:17:46,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1373979382] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:46,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:17:46,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [8, 9, 9] total 47 [2022-12-14 11:17:46,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126091275] [2022-12-14 11:17:46,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:46,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 11:17:46,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:46,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 11:17:46,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1977, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 11:17:46,586 INFO L87 Difference]: Start difference. First operand 950 states and 1258 transitions. Second operand has 36 states, 32 states have (on average 1.5) internal successors, (48), 25 states have internal predecessors, (48), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-12-14 11:17:50,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:50,905 INFO L93 Difference]: Finished difference Result 1535 states and 2055 transitions. [2022-12-14 11:17:50,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 11:17:50,905 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 1.5) internal successors, (48), 25 states have internal predecessors, (48), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 77 [2022-12-14 11:17:50,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:50,908 INFO L225 Difference]: With dead ends: 1535 [2022-12-14 11:17:50,909 INFO L226 Difference]: Without dead ends: 936 [2022-12-14 11:17:50,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 181 SyntacticMatches, 14 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=202, Invalid=2150, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 11:17:50,910 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 68 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 2003 SdHoareTripleChecker+Invalid, 1688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:50,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 2003 Invalid, 1688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-12-14 11:17:50,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-12-14 11:17:51,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 936. [2022-12-14 11:17:51,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 685 states have (on average 1.3226277372262774) internal successors, (906), 690 states have internal predecessors, (906), 166 states have call successors, (166), 84 states have call predecessors, (166), 84 states have return successors, (166), 161 states have call predecessors, (166), 166 states have call successors, (166) [2022-12-14 11:17:51,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1238 transitions. [2022-12-14 11:17:51,071 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1238 transitions. Word has length 77 [2022-12-14 11:17:51,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:51,071 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1238 transitions. [2022-12-14 11:17:51,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 1.5) internal successors, (48), 25 states have internal predecessors, (48), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-12-14 11:17:51,071 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1238 transitions. [2022-12-14 11:17:51,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 11:17:51,072 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:51,072 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:17:51,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 11:17:51,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 11:17:51,273 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:51,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:51,273 INFO L85 PathProgramCache]: Analyzing trace with hash -70764728, now seen corresponding path program 1 times [2022-12-14 11:17:51,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:51,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31959015] [2022-12-14 11:17:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:51,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 11:17:51,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:51,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31959015] [2022-12-14 11:17:51,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31959015] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:17:51,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052630569] [2022-12-14 11:17:51,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:51,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:17:51,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:17:51,489 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:17:51,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 11:17:51,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:51,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:17:51,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:17:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:17:51,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:17:51,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052630569] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:51,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:17:51,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-12-14 11:17:51,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923673460] [2022-12-14 11:17:51,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:51,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:17:51,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:51,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:17:51,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-12-14 11:17:51,650 INFO L87 Difference]: Start difference. First operand 936 states and 1238 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 11:17:52,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:52,177 INFO L93 Difference]: Finished difference Result 1832 states and 2500 transitions. [2022-12-14 11:17:52,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:17:52,178 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 77 [2022-12-14 11:17:52,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:52,181 INFO L225 Difference]: With dead ends: 1832 [2022-12-14 11:17:52,181 INFO L226 Difference]: Without dead ends: 1116 [2022-12-14 11:17:52,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-12-14 11:17:52,182 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 515 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:52,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 1625 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:17:52,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-12-14 11:17:52,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 936. [2022-12-14 11:17:52,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 685 states have (on average 1.3167883211678832) internal successors, (902), 690 states have internal predecessors, (902), 166 states have call successors, (166), 84 states have call predecessors, (166), 84 states have return successors, (166), 161 states have call predecessors, (166), 166 states have call successors, (166) [2022-12-14 11:17:52,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1234 transitions. [2022-12-14 11:17:52,349 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1234 transitions. Word has length 77 [2022-12-14 11:17:52,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:52,349 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1234 transitions. [2022-12-14 11:17:52,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 11:17:52,349 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1234 transitions. [2022-12-14 11:17:52,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 11:17:52,350 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:52,350 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:17:52,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 11:17:52,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 11:17:52,551 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:52,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:52,552 INFO L85 PathProgramCache]: Analyzing trace with hash 900440666, now seen corresponding path program 1 times [2022-12-14 11:17:52,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:52,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065743274] [2022-12-14 11:17:52,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:52,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:52,680 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 11:17:52,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:52,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065743274] [2022-12-14 11:17:52,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065743274] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:52,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:17:52,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:17:52,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865506681] [2022-12-14 11:17:52,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:52,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:17:52,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:52,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:17:52,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:17:52,681 INFO L87 Difference]: Start difference. First operand 936 states and 1234 transitions. Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-12-14 11:17:52,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:52,975 INFO L93 Difference]: Finished difference Result 1241 states and 1714 transitions. [2022-12-14 11:17:52,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:17:52,976 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 80 [2022-12-14 11:17:52,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:52,979 INFO L225 Difference]: With dead ends: 1241 [2022-12-14 11:17:52,979 INFO L226 Difference]: Without dead ends: 1239 [2022-12-14 11:17:52,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:17:52,979 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 171 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1541 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:52,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 1541 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:17:52,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2022-12-14 11:17:53,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 944. [2022-12-14 11:17:53,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 689 states have (on average 1.3149492017416546) internal successors, (906), 696 states have internal predecessors, (906), 168 states have call successors, (168), 86 states have call predecessors, (168), 86 states have return successors, (168), 161 states have call predecessors, (168), 168 states have call successors, (168) [2022-12-14 11:17:53,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1242 transitions. [2022-12-14 11:17:53,249 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1242 transitions. Word has length 80 [2022-12-14 11:17:53,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:53,250 INFO L495 AbstractCegarLoop]: Abstraction has 944 states and 1242 transitions. [2022-12-14 11:17:53,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-12-14 11:17:53,250 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1242 transitions. [2022-12-14 11:17:53,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 11:17:53,251 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:53,252 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:17:53,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 11:17:53,252 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:53,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:53,252 INFO L85 PathProgramCache]: Analyzing trace with hash -950005833, now seen corresponding path program 1 times [2022-12-14 11:17:53,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:53,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620836352] [2022-12-14 11:17:53,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:53,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:53,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 11:17:53,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:53,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620836352] [2022-12-14 11:17:53,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620836352] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:53,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:17:53,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:17:53,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672533945] [2022-12-14 11:17:53,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:53,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:17:53,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:53,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:17:53,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:17:53,354 INFO L87 Difference]: Start difference. First operand 944 states and 1242 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-12-14 11:17:53,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:53,557 INFO L93 Difference]: Finished difference Result 1626 states and 2156 transitions. [2022-12-14 11:17:53,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:17:53,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 83 [2022-12-14 11:17:53,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:53,560 INFO L225 Difference]: With dead ends: 1626 [2022-12-14 11:17:53,560 INFO L226 Difference]: Without dead ends: 932 [2022-12-14 11:17:53,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:17:53,562 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 7 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:53,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 634 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:17:53,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2022-12-14 11:17:53,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 932. [2022-12-14 11:17:53,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 683 states have (on average 1.2913616398243046) internal successors, (882), 690 states have internal predecessors, (882), 162 states have call successors, (162), 86 states have call predecessors, (162), 86 states have return successors, (162), 155 states have call predecessors, (162), 162 states have call successors, (162) [2022-12-14 11:17:53,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1206 transitions. [2022-12-14 11:17:53,771 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1206 transitions. Word has length 83 [2022-12-14 11:17:53,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:53,772 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 1206 transitions. [2022-12-14 11:17:53,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-12-14 11:17:53,772 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1206 transitions. [2022-12-14 11:17:53,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 11:17:53,773 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:53,773 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:17:53,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 11:17:53,773 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:53,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:53,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1171331438, now seen corresponding path program 1 times [2022-12-14 11:17:53,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:53,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771304771] [2022-12-14 11:17:53,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:53,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:54,142 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 11:17:54,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:54,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771304771] [2022-12-14 11:17:54,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771304771] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:17:54,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954627757] [2022-12-14 11:17:54,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:54,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:17:54,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:17:54,144 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:17:54,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 11:17:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:54,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:17:54,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:17:54,402 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 11:17:54,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:17:54,535 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 11:17:54,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954627757] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:17:54,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [180449294] [2022-12-14 11:17:54,537 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-12-14 11:17:54,537 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:17:54,537 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:17:54,537 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:17:54,538 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:17:58,720 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 241 for LOIs [2022-12-14 11:17:58,918 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 11:17:58,934 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 123 for LOIs [2022-12-14 11:17:59,022 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 157 for LOIs [2022-12-14 11:17:59,055 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 153 for LOIs [2022-12-14 11:17:59,099 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 11:17:59,142 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:18:37,629 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39294#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s1p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~s1s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (= assert_~arg |assert_#in~arg|) (= ~s2s2~0 0) (not (= (mod ~side1Failed_History_0~0 256) 0)) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256))) ~s2p_old~0) (<= 0 ~manual_selection_History_2~0) (= ~side2_written~0 0) (not (= (mod ~side2Failed_History_1~0 256) 0)) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~s1s1_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (<= ~manual_selection_History_2~0 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256)))) (= ~nomsg~0 ~cs2_new~0) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= ~s2p~0 0) (= (mod ~side1Failed_History_1~0 256) 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-12-14 11:18:37,629 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:18:37,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:18:37,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 20 [2022-12-14 11:18:37,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074581589] [2022-12-14 11:18:37,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:18:37,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 11:18:37,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:18:37,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 11:18:37,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=529, Invalid=3893, Unknown=0, NotChecked=0, Total=4422 [2022-12-14 11:18:37,632 INFO L87 Difference]: Start difference. First operand 932 states and 1206 transitions. Second operand has 20 states, 15 states have (on average 6.4) internal successors, (96), 18 states have internal predecessors, (96), 6 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2022-12-14 11:18:38,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:18:38,679 INFO L93 Difference]: Finished difference Result 2259 states and 3126 transitions. [2022-12-14 11:18:38,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 11:18:38,679 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 6.4) internal successors, (96), 18 states have internal predecessors, (96), 6 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) Word has length 85 [2022-12-14 11:18:38,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:18:38,683 INFO L225 Difference]: With dead ends: 2259 [2022-12-14 11:18:38,683 INFO L226 Difference]: Without dead ends: 1502 [2022-12-14 11:18:38,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 187 SyntacticMatches, 15 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 38.8s TimeCoverageRelationStatistics Valid=604, Invalid=4798, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 11:18:38,685 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 478 mSDsluCounter, 4356 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 4734 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:18:38,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 4734 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:18:38,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2022-12-14 11:18:38,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 911. [2022-12-14 11:18:38,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 668 states have (on average 1.284431137724551) internal successors, (858), 675 states have internal predecessors, (858), 156 states have call successors, (156), 86 states have call predecessors, (156), 86 states have return successors, (156), 149 states have call predecessors, (156), 156 states have call successors, (156) [2022-12-14 11:18:38,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1170 transitions. [2022-12-14 11:18:38,865 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1170 transitions. Word has length 85 [2022-12-14 11:18:38,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:18:38,865 INFO L495 AbstractCegarLoop]: Abstraction has 911 states and 1170 transitions. [2022-12-14 11:18:38,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 6.4) internal successors, (96), 18 states have internal predecessors, (96), 6 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2022-12-14 11:18:38,865 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1170 transitions. [2022-12-14 11:18:38,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 11:18:38,866 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:18:38,866 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:18:38,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 11:18:39,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:18:39,068 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:18:39,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:18:39,069 INFO L85 PathProgramCache]: Analyzing trace with hash 2104528376, now seen corresponding path program 1 times [2022-12-14 11:18:39,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:18:39,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280842591] [2022-12-14 11:18:39,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:18:39,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:18:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:18:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 11:18:39,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:18:39,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280842591] [2022-12-14 11:18:39,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280842591] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:18:39,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300041177] [2022-12-14 11:18:39,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:18:39,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:18:39,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:18:39,251 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:18:39,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 11:18:39,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:18:39,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 11:18:39,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:18:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 11:18:39,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:18:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:18:39,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300041177] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:18:39,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1628049776] [2022-12-14 11:18:39,530 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-12-14 11:18:39,531 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:18:39,531 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:18:39,531 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:18:39,531 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:18:42,279 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-12-14 11:18:42,300 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 11:18:42,316 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-12-14 11:18:42,404 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 152 for LOIs [2022-12-14 11:18:42,454 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 11:18:42,495 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:19:10,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1628049776] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:19:10,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:19:10,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [8, 9, 9] total 53 [2022-12-14 11:19:10,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309204085] [2022-12-14 11:19:10,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:19:10,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 11:19:10,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:19:10,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 11:19:10,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2506, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 11:19:10,289 INFO L87 Difference]: Start difference. First operand 911 states and 1170 transitions. Second operand has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 29 states have internal predecessors, (50), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-14 11:19:16,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:19:16,725 INFO L93 Difference]: Finished difference Result 1536 states and 2008 transitions. [2022-12-14 11:19:16,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-14 11:19:16,725 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 29 states have internal predecessors, (50), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 85 [2022-12-14 11:19:16,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:19:16,727 INFO L225 Difference]: With dead ends: 1536 [2022-12-14 11:19:16,728 INFO L226 Difference]: Without dead ends: 946 [2022-12-14 11:19:16,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 199 SyntacticMatches, 14 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=258, Invalid=2604, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 11:19:16,729 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 186 mSDsluCounter, 3493 mSDsCounter, 0 mSdLazyCounter, 2912 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 3773 SdHoareTripleChecker+Invalid, 2974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:19:16,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 3773 Invalid, 2974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2912 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-12-14 11:19:16,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-12-14 11:19:16,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 914. [2022-12-14 11:19:16,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 670 states have (on average 1.2835820895522387) internal successors, (860), 677 states have internal predecessors, (860), 157 states have call successors, (157), 86 states have call predecessors, (157), 86 states have return successors, (157), 150 states have call predecessors, (157), 157 states have call successors, (157) [2022-12-14 11:19:16,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1174 transitions. [2022-12-14 11:19:16,909 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1174 transitions. Word has length 85 [2022-12-14 11:19:16,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:19:16,909 INFO L495 AbstractCegarLoop]: Abstraction has 914 states and 1174 transitions. [2022-12-14 11:19:16,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 29 states have internal predecessors, (50), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-14 11:19:16,909 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1174 transitions. [2022-12-14 11:19:16,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 11:19:16,910 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:19:16,910 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:19:16,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 11:19:17,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:19:17,112 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:19:17,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:19:17,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1191534301, now seen corresponding path program 1 times [2022-12-14 11:19:17,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:19:17,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108954227] [2022-12-14 11:19:17,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:19:17,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:19:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:19:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 11:19:17,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:19:17,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108954227] [2022-12-14 11:19:17,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108954227] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:19:17,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868432450] [2022-12-14 11:19:17,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:19:17,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:19:17,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:19:17,294 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:19:17,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 11:19:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:19:17,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 11:19:17,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:19:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 11:19:17,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:19:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:19:17,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868432450] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:19:17,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1838828109] [2022-12-14 11:19:17,518 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-12-14 11:19:17,518 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:19:17,518 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:19:17,519 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:19:17,519 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:19:20,283 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-12-14 11:19:20,305 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 11:19:20,321 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-12-14 11:19:20,408 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 151 for LOIs [2022-12-14 11:19:20,451 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-12-14 11:19:20,491 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:19:50,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1838828109] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:19:50,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:19:50,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [8, 9, 9] total 55 [2022-12-14 11:19:50,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117286082] [2022-12-14 11:19:50,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:19:50,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 11:19:50,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:19:50,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 11:19:50,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2721, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 11:19:50,277 INFO L87 Difference]: Start difference. First operand 914 states and 1174 transitions. Second operand has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 31 states have internal predecessors, (52), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-14 11:19:59,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:19:59,127 INFO L93 Difference]: Finished difference Result 1539 states and 2012 transitions. [2022-12-14 11:19:59,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 11:19:59,127 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 31 states have internal predecessors, (52), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 87 [2022-12-14 11:19:59,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:19:59,130 INFO L225 Difference]: With dead ends: 1539 [2022-12-14 11:19:59,130 INFO L226 Difference]: Without dead ends: 949 [2022-12-14 11:19:59,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 206 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=257, Invalid=2823, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 11:19:59,131 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 131 mSDsluCounter, 5388 mSDsCounter, 0 mSdLazyCounter, 4444 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 5689 SdHoareTripleChecker+Invalid, 4475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 4444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:19:59,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 5689 Invalid, 4475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 4444 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-12-14 11:19:59,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-12-14 11:19:59,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 917. [2022-12-14 11:19:59,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 672 states have (on average 1.2827380952380953) internal successors, (862), 679 states have internal predecessors, (862), 158 states have call successors, (158), 86 states have call predecessors, (158), 86 states have return successors, (158), 151 states have call predecessors, (158), 158 states have call successors, (158) [2022-12-14 11:19:59,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1178 transitions. [2022-12-14 11:19:59,316 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1178 transitions. Word has length 87 [2022-12-14 11:19:59,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:19:59,316 INFO L495 AbstractCegarLoop]: Abstraction has 917 states and 1178 transitions. [2022-12-14 11:19:59,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 31 states have internal predecessors, (52), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-14 11:19:59,316 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1178 transitions. [2022-12-14 11:19:59,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 11:19:59,318 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:19:59,318 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:19:59,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 11:19:59,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 11:19:59,520 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:19:59,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:19:59,521 INFO L85 PathProgramCache]: Analyzing trace with hash 352734337, now seen corresponding path program 1 times [2022-12-14 11:19:59,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:19:59,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656692692] [2022-12-14 11:19:59,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:19:59,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:19:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:19:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 11:19:59,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:19:59,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656692692] [2022-12-14 11:19:59,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656692692] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:19:59,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:19:59,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:19:59,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246249804] [2022-12-14 11:19:59,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:19:59,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:19:59,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:19:59,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:19:59,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:19:59,670 INFO L87 Difference]: Start difference. First operand 917 states and 1178 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-12-14 11:19:59,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:19:59,921 INFO L93 Difference]: Finished difference Result 1560 states and 2026 transitions. [2022-12-14 11:19:59,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:19:59,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 92 [2022-12-14 11:19:59,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:19:59,924 INFO L225 Difference]: With dead ends: 1560 [2022-12-14 11:19:59,924 INFO L226 Difference]: Without dead ends: 905 [2022-12-14 11:19:59,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:19:59,925 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 7 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:19:59,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 616 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:19:59,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-12-14 11:20:00,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 905. [2022-12-14 11:20:00,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 666 states have (on average 1.2582582582582582) internal successors, (838), 673 states have internal predecessors, (838), 152 states have call successors, (152), 86 states have call predecessors, (152), 86 states have return successors, (152), 145 states have call predecessors, (152), 152 states have call successors, (152) [2022-12-14 11:20:00,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1142 transitions. [2022-12-14 11:20:00,113 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1142 transitions. Word has length 92 [2022-12-14 11:20:00,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:20:00,113 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1142 transitions. [2022-12-14 11:20:00,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-12-14 11:20:00,113 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1142 transitions. [2022-12-14 11:20:00,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 11:20:00,114 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:20:00,114 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:20:00,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 11:20:00,114 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:20:00,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:20:00,114 INFO L85 PathProgramCache]: Analyzing trace with hash -717473955, now seen corresponding path program 1 times [2022-12-14 11:20:00,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:20:00,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683075443] [2022-12-14 11:20:00,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:20:00,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:20:00,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:20:00,304 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 11:20:00,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:20:00,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683075443] [2022-12-14 11:20:00,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683075443] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:20:00,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655109900] [2022-12-14 11:20:00,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:20:00,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:20:00,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:20:00,305 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:20:00,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 11:20:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:20:00,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 11:20:00,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:20:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 11:20:00,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:20:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 11:20:00,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655109900] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:20:00,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [216979120] [2022-12-14 11:20:00,519 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-12-14 11:20:00,519 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:20:00,519 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:20:00,519 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:20:00,519 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:20:03,553 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-12-14 11:20:03,583 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 11:20:03,599 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-12-14 11:20:03,687 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 202 for LOIs [2022-12-14 11:20:04,036 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 11:20:04,079 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:20:36,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [216979120] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:20:36,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:20:36,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [8, 9, 9] total 56 [2022-12-14 11:20:36,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116032387] [2022-12-14 11:20:36,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:20:36,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 11:20:36,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:20:36,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 11:20:36,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2796, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 11:20:36,653 INFO L87 Difference]: Start difference. First operand 905 states and 1142 transitions. Second operand has 45 states, 40 states have (on average 1.325) internal successors, (53), 31 states have internal predecessors, (53), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-12-14 11:20:43,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:20:43,657 INFO L93 Difference]: Finished difference Result 1509 states and 1935 transitions. [2022-12-14 11:20:43,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 11:20:43,658 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 40 states have (on average 1.325) internal successors, (53), 31 states have internal predecessors, (53), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 92 [2022-12-14 11:20:43,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:20:43,661 INFO L225 Difference]: With dead ends: 1509 [2022-12-14 11:20:43,661 INFO L226 Difference]: Without dead ends: 927 [2022-12-14 11:20:43,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 221 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 33.2s TimeCoverageRelationStatistics Valid=292, Invalid=2900, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 11:20:43,662 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 173 mSDsluCounter, 3891 mSDsCounter, 0 mSdLazyCounter, 3318 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 4170 SdHoareTripleChecker+Invalid, 3390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 3318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:20:43,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 4170 Invalid, 3390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 3318 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-12-14 11:20:43,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-12-14 11:20:43,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 892. [2022-12-14 11:20:43,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 657 states have (on average 1.2557077625570776) internal successors, (825), 664 states have internal predecessors, (825), 148 states have call successors, (148), 86 states have call predecessors, (148), 86 states have return successors, (148), 141 states have call predecessors, (148), 148 states have call successors, (148) [2022-12-14 11:20:43,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1121 transitions. [2022-12-14 11:20:43,846 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1121 transitions. Word has length 92 [2022-12-14 11:20:43,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:20:43,846 INFO L495 AbstractCegarLoop]: Abstraction has 892 states and 1121 transitions. [2022-12-14 11:20:43,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 40 states have (on average 1.325) internal successors, (53), 31 states have internal predecessors, (53), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-12-14 11:20:43,846 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1121 transitions. [2022-12-14 11:20:43,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 11:20:43,847 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:20:43,847 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:20:43,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 11:20:44,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 11:20:44,049 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:20:44,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:20:44,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1106605352, now seen corresponding path program 1 times [2022-12-14 11:20:44,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:20:44,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989887117] [2022-12-14 11:20:44,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:20:44,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:20:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:20:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 11:20:44,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:20:44,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989887117] [2022-12-14 11:20:44,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989887117] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:20:44,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473748211] [2022-12-14 11:20:44,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:20:44,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:20:44,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:20:44,262 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:20:44,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 11:20:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:20:44,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 11:20:44,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:20:44,421 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 11:20:44,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:20:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 11:20:44,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473748211] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:20:44,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [802149242] [2022-12-14 11:20:44,502 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-12-14 11:20:44,502 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:20:44,503 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:20:44,503 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:20:44,503 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:20:47,382 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-12-14 11:20:47,412 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 11:20:47,428 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 198 for LOIs [2022-12-14 11:20:47,753 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 203 for LOIs [2022-12-14 11:20:48,099 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-12-14 11:20:48,140 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:21:24,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [802149242] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:21:24,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:21:24,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [8, 9, 9] total 56 [2022-12-14 11:21:24,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311536721] [2022-12-14 11:21:24,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:21:24,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 11:21:24,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:21:24,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 11:21:24,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2830, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 11:21:24,081 INFO L87 Difference]: Start difference. First operand 892 states and 1121 transitions. Second operand has 45 states, 40 states have (on average 1.375) internal successors, (55), 32 states have internal predecessors, (55), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-12-14 11:21:33,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:21:33,101 INFO L93 Difference]: Finished difference Result 1509 states and 1935 transitions. [2022-12-14 11:21:33,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 11:21:33,102 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 40 states have (on average 1.375) internal successors, (55), 32 states have internal predecessors, (55), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) Word has length 94 [2022-12-14 11:21:33,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:21:33,104 INFO L225 Difference]: With dead ends: 1509 [2022-12-14 11:21:33,104 INFO L226 Difference]: Without dead ends: 924 [2022-12-14 11:21:33,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 225 SyntacticMatches, 12 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 36.7s TimeCoverageRelationStatistics Valid=258, Invalid=2934, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 11:21:33,106 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 200 mSDsluCounter, 5127 mSDsCounter, 0 mSdLazyCounter, 4232 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 5427 SdHoareTripleChecker+Invalid, 4295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 4232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:21:33,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 5427 Invalid, 4295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 4232 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-12-14 11:21:33,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-12-14 11:21:33,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 892. [2022-12-14 11:21:33,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 657 states have (on average 1.2541856925418569) internal successors, (824), 664 states have internal predecessors, (824), 148 states have call successors, (148), 86 states have call predecessors, (148), 86 states have return successors, (148), 141 states have call predecessors, (148), 148 states have call successors, (148) [2022-12-14 11:21:33,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1120 transitions. [2022-12-14 11:21:33,293 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1120 transitions. Word has length 94 [2022-12-14 11:21:33,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:21:33,293 INFO L495 AbstractCegarLoop]: Abstraction has 892 states and 1120 transitions. [2022-12-14 11:21:33,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 40 states have (on average 1.375) internal successors, (55), 32 states have internal predecessors, (55), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-12-14 11:21:33,294 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1120 transitions. [2022-12-14 11:21:33,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 11:21:33,294 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:21:33,295 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:21:33,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 11:21:33,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:21:33,496 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:21:33,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:21:33,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1544233509, now seen corresponding path program 1 times [2022-12-14 11:21:33,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:21:33,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495530499] [2022-12-14 11:21:33,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:21:33,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:21:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:21:33,707 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 11:21:33,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:21:33,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495530499] [2022-12-14 11:21:33,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495530499] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:21:33,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100097010] [2022-12-14 11:21:33,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:21:33,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:21:33,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:21:33,708 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:21:33,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 11:21:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:21:33,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 11:21:33,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:21:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 11:21:33,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:21:33,954 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 11:21:33,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100097010] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:21:33,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2060182462] [2022-12-14 11:21:33,956 INFO L159 IcfgInterpreter]: Started Sifa with 75 locations of interest [2022-12-14 11:21:33,956 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:21:33,956 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:21:33,956 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:21:33,956 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:21:37,384 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-12-14 11:21:37,405 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 11:21:37,421 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 90 for LOIs [2022-12-14 11:21:37,484 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 203 for LOIs [2022-12-14 11:21:37,822 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-12-14 11:21:37,862 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:22:14,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2060182462] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:22:14,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:22:14,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [8, 9, 9] total 58 [2022-12-14 11:22:14,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531126753] [2022-12-14 11:22:14,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:22:14,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 11:22:14,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:22:14,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 11:22:14,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=3024, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 11:22:14,476 INFO L87 Difference]: Start difference. First operand 892 states and 1120 transitions. Second operand has 47 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 33 states have internal predecessors, (59), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-12-14 11:22:23,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:22:23,879 INFO L93 Difference]: Finished difference Result 1496 states and 1913 transitions. [2022-12-14 11:22:23,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 11:22:23,880 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 33 states have internal predecessors, (59), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 98 [2022-12-14 11:22:23,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:22:23,882 INFO L225 Difference]: With dead ends: 1496 [2022-12-14 11:22:23,882 INFO L226 Difference]: Without dead ends: 914 [2022-12-14 11:22:23,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 230 SyntacticMatches, 17 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 37.7s TimeCoverageRelationStatistics Valid=299, Invalid=3241, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 11:22:23,884 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 147 mSDsluCounter, 4711 mSDsCounter, 0 mSdLazyCounter, 4205 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 4992 SdHoareTripleChecker+Invalid, 4251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 4205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:22:23,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 4992 Invalid, 4251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 4205 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-12-14 11:22:23,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-12-14 11:22:24,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 879. [2022-12-14 11:22:24,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 648 states have (on average 1.251543209876543) internal successors, (811), 655 states have internal predecessors, (811), 144 states have call successors, (144), 86 states have call predecessors, (144), 86 states have return successors, (144), 137 states have call predecessors, (144), 144 states have call successors, (144) [2022-12-14 11:22:24,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1099 transitions. [2022-12-14 11:22:24,065 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1099 transitions. Word has length 98 [2022-12-14 11:22:24,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:22:24,065 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 1099 transitions. [2022-12-14 11:22:24,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 33 states have internal predecessors, (59), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-12-14 11:22:24,065 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1099 transitions. [2022-12-14 11:22:24,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 11:22:24,066 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:22:24,067 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:22:24,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 11:22:24,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 11:22:24,269 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:22:24,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:22:24,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1971068227, now seen corresponding path program 1 times [2022-12-14 11:22:24,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:22:24,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556590362] [2022-12-14 11:22:24,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:22:24,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:22:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:22:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 11:22:24,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:22:24,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556590362] [2022-12-14 11:22:24,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556590362] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:22:24,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:22:24,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:22:24,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266764584] [2022-12-14 11:22:24,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:22:24,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:22:24,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:22:24,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:22:24,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:22:24,394 INFO L87 Difference]: Start difference. First operand 879 states and 1099 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-12-14 11:22:24,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:22:24,683 INFO L93 Difference]: Finished difference Result 1462 states and 1860 transitions. [2022-12-14 11:22:24,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:22:24,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 108 [2022-12-14 11:22:24,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:22:24,685 INFO L225 Difference]: With dead ends: 1462 [2022-12-14 11:22:24,685 INFO L226 Difference]: Without dead ends: 867 [2022-12-14 11:22:24,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:22:24,686 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 7 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:22:24,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 604 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:22:24,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-12-14 11:22:24,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 817. [2022-12-14 11:22:24,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 606 states have (on average 1.2194719471947195) internal successors, (739), 613 states have internal predecessors, (739), 130 states have call successors, (130), 80 states have call predecessors, (130), 80 states have return successors, (130), 123 states have call predecessors, (130), 130 states have call successors, (130) [2022-12-14 11:22:24,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 999 transitions. [2022-12-14 11:22:24,862 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 999 transitions. Word has length 108 [2022-12-14 11:22:24,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:22:24,863 INFO L495 AbstractCegarLoop]: Abstraction has 817 states and 999 transitions. [2022-12-14 11:22:24,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-12-14 11:22:24,863 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 999 transitions. [2022-12-14 11:22:24,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 11:22:24,864 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:22:24,864 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:22:24,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 11:22:24,864 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:22:24,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:22:24,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1497761095, now seen corresponding path program 1 times [2022-12-14 11:22:24,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:22:24,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517145936] [2022-12-14 11:22:24,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:22:24,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:22:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:22:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 11:22:24,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:22:24,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517145936] [2022-12-14 11:22:24,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517145936] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:22:24,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:22:24,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:22:24,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596366515] [2022-12-14 11:22:24,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:22:24,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:22:24,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:22:24,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:22:24,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:22:24,963 INFO L87 Difference]: Start difference. First operand 817 states and 999 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-12-14 11:22:25,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:22:25,214 INFO L93 Difference]: Finished difference Result 1305 states and 1631 transitions. [2022-12-14 11:22:25,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:22:25,214 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 124 [2022-12-14 11:22:25,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:22:25,216 INFO L225 Difference]: With dead ends: 1305 [2022-12-14 11:22:25,216 INFO L226 Difference]: Without dead ends: 805 [2022-12-14 11:22:25,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:22:25,218 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 6 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:22:25,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 595 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:22:25,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-12-14 11:22:25,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 789. [2022-12-14 11:22:25,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 586 states have (on average 1.1996587030716723) internal successors, (703), 593 states have internal predecessors, (703), 124 states have call successors, (124), 78 states have call predecessors, (124), 78 states have return successors, (124), 117 states have call predecessors, (124), 124 states have call successors, (124) [2022-12-14 11:22:25,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 951 transitions. [2022-12-14 11:22:25,392 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 951 transitions. Word has length 124 [2022-12-14 11:22:25,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:22:25,393 INFO L495 AbstractCegarLoop]: Abstraction has 789 states and 951 transitions. [2022-12-14 11:22:25,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-12-14 11:22:25,393 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 951 transitions. [2022-12-14 11:22:25,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 11:22:25,394 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:22:25,394 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:22:25,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-14 11:22:25,394 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:22:25,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:22:25,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1310692744, now seen corresponding path program 1 times [2022-12-14 11:22:25,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:22:25,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630411587] [2022-12-14 11:22:25,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:22:25,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:22:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:22:25,587 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 11:22:25,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:22:25,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630411587] [2022-12-14 11:22:25,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630411587] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:22:25,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172072772] [2022-12-14 11:22:25,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:22:25,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:22:25,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:22:25,589 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:22:25,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 11:22:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:22:25,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 11:22:25,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:22:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 69 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 11:22:25,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:22:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-12-14 11:22:25,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172072772] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:22:25,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1326059678] [2022-12-14 11:22:25,815 INFO L159 IcfgInterpreter]: Started Sifa with 86 locations of interest [2022-12-14 11:22:25,816 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:22:25,816 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:22:25,816 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:22:25,816 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:22:32,001 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 91 for LOIs [2022-12-14 11:22:32,097 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 11:22:32,113 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-12-14 11:22:32,208 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 151 for LOIs [2022-12-14 11:22:32,240 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 195 for LOIs [2022-12-14 11:22:32,644 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 184 for LOIs [2022-12-14 11:22:33,050 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:23:18,180 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '72173#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s1p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (not (= (mod ~side1Failed~0 256) 0)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) (mod ~side2Failed_History_2~0 256)) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~s1s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (= assert_~arg |assert_#in~arg|) (= ~s2s2~0 0) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (= ~side2_written~0 0) (= ~manual_selection_History_2~0 0) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (= ~s2p_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~s1s1_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= ~s2p~0 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-12-14 11:23:18,181 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:23:18,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:23:18,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 13 [2022-12-14 11:23:18,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020825729] [2022-12-14 11:23:18,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:23:18,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 11:23:18,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:23:18,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 11:23:18,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=3961, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 11:23:18,183 INFO L87 Difference]: Start difference. First operand 789 states and 951 transitions. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 10 states have internal predecessors, (108), 3 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 3 states have call successors, (30) [2022-12-14 11:23:19,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:23:19,219 INFO L93 Difference]: Finished difference Result 2118 states and 2709 transitions. [2022-12-14 11:23:19,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 11:23:19,219 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 10 states have internal predecessors, (108), 3 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 3 states have call successors, (30) Word has length 134 [2022-12-14 11:23:19,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:23:19,225 INFO L225 Difference]: With dead ends: 2118 [2022-12-14 11:23:19,225 INFO L226 Difference]: Without dead ends: 1496 [2022-12-14 11:23:19,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 323 SyntacticMatches, 24 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=365, Invalid=4605, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 11:23:19,227 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 535 mSDsluCounter, 2054 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 2327 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:23:19,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 2327 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:23:19,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2022-12-14 11:23:19,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1092. [2022-12-14 11:23:19,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 808 states have (on average 1.1893564356435644) internal successors, (961), 818 states have internal predecessors, (961), 172 states have call successors, (172), 111 states have call predecessors, (172), 111 states have return successors, (172), 162 states have call predecessors, (172), 172 states have call successors, (172) [2022-12-14 11:23:19,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1305 transitions. [2022-12-14 11:23:19,486 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1305 transitions. Word has length 134 [2022-12-14 11:23:19,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:23:19,486 INFO L495 AbstractCegarLoop]: Abstraction has 1092 states and 1305 transitions. [2022-12-14 11:23:19,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 10 states have internal predecessors, (108), 3 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 3 states have call successors, (30) [2022-12-14 11:23:19,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1305 transitions. [2022-12-14 11:23:19,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 11:23:19,488 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:23:19,488 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:23:19,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 11:23:19,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:23:19,689 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:23:19,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:23:19,689 INFO L85 PathProgramCache]: Analyzing trace with hash -380507736, now seen corresponding path program 1 times [2022-12-14 11:23:19,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:23:19,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424541401] [2022-12-14 11:23:19,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:23:19,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:23:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:23:21,521 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-12-14 11:23:21,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:23:21,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424541401] [2022-12-14 11:23:21,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424541401] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:23:21,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860918009] [2022-12-14 11:23:21,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:23:21,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:23:21,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:23:21,523 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:23:21,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 11:23:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:23:21,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 11:23:21,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:23:22,266 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 71 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 11:23:22,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:23:22,848 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-12-14 11:23:22,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860918009] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:23:22,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [729442181] [2022-12-14 11:23:22,850 INFO L159 IcfgInterpreter]: Started Sifa with 89 locations of interest [2022-12-14 11:23:22,850 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:23:22,850 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:23:22,850 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:23:22,851 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:23:30,341 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 92 for LOIs [2022-12-14 11:23:30,436 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 11:23:30,451 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-12-14 11:23:30,543 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 152 for LOIs [2022-12-14 11:23:30,574 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 122 for LOIs [2022-12-14 11:23:30,694 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 197 for LOIs [2022-12-14 11:23:31,110 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:24:30,747 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '77344#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s1p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (not (= (mod ~side1Failed~0 256) 0)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) (mod ~side2Failed_History_2~0 256)) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~s1s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (= assert_~arg |assert_#in~arg|) (= ~s2s2~0 0) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (= (mod ~side2Failed_History_1~0 256) 0) (= ~side2_written~0 0) (= ~manual_selection_History_2~0 0) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (= ~s2p_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~s1s1_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= ~s2p~0 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-12-14 11:24:30,747 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:24:30,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:24:30,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 14, 14] total 55 [2022-12-14 11:24:30,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221017811] [2022-12-14 11:24:30,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:24:30,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-14 11:24:30,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:24:30,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-14 11:24:30,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=10192, Unknown=0, NotChecked=0, Total=12210 [2022-12-14 11:24:30,752 INFO L87 Difference]: Start difference. First operand 1092 states and 1305 transitions. Second operand has 55 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 44 states have internal predecessors, (185), 18 states have call successors, (50), 5 states have call predecessors, (50), 17 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) [2022-12-14 11:24:36,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:24:36,668 INFO L93 Difference]: Finished difference Result 2864 states and 3817 transitions. [2022-12-14 11:24:36,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 11:24:36,669 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 44 states have internal predecessors, (185), 18 states have call successors, (50), 5 states have call predecessors, (50), 17 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) Word has length 142 [2022-12-14 11:24:36,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:24:36,681 INFO L225 Difference]: With dead ends: 2864 [2022-12-14 11:24:36,681 INFO L226 Difference]: Without dead ends: 1981 [2022-12-14 11:24:36,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 330 SyntacticMatches, 23 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6281 ImplicationChecksByTransitivity, 62.5s TimeCoverageRelationStatistics Valid=2492, Invalid=16414, Unknown=0, NotChecked=0, Total=18906 [2022-12-14 11:24:36,686 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 1308 mSDsluCounter, 11942 mSDsCounter, 0 mSdLazyCounter, 5174 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1364 SdHoareTripleChecker+Valid, 12412 SdHoareTripleChecker+Invalid, 5510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 5174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:24:36,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1364 Valid, 12412 Invalid, 5510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 5174 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-12-14 11:24:36,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1981 states. [2022-12-14 11:24:36,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1981 to 1033. [2022-12-14 11:24:36,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 767 states have (on average 1.21251629726206) internal successors, (930), 779 states have internal predecessors, (930), 160 states have call successors, (160), 105 states have call predecessors, (160), 105 states have return successors, (160), 148 states have call predecessors, (160), 160 states have call successors, (160) [2022-12-14 11:24:36,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1250 transitions. [2022-12-14 11:24:36,933 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1250 transitions. Word has length 142 [2022-12-14 11:24:36,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:24:36,933 INFO L495 AbstractCegarLoop]: Abstraction has 1033 states and 1250 transitions. [2022-12-14 11:24:36,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 44 states have internal predecessors, (185), 18 states have call successors, (50), 5 states have call predecessors, (50), 17 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) [2022-12-14 11:24:36,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1250 transitions. [2022-12-14 11:24:36,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 11:24:36,934 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:24:36,935 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:24:36,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 11:24:37,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:24:37,136 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:24:37,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:24:37,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1892400056, now seen corresponding path program 1 times [2022-12-14 11:24:37,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:24:37,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304624845] [2022-12-14 11:24:37,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:24:37,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:24:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:24:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 11:24:37,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:24:37,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304624845] [2022-12-14 11:24:37,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304624845] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:24:37,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028922142] [2022-12-14 11:24:37,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:24:37,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:24:37,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:24:37,688 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:24:37,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 11:24:37,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:24:37,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 11:24:37,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:24:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 66 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 11:24:38,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:24:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 11:24:38,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028922142] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:24:38,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1948668721] [2022-12-14 11:24:38,903 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2022-12-14 11:24:38,903 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:24:38,903 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:24:38,903 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:24:38,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:25:05,203 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 59 for LOIs [2022-12-14 11:25:05,240 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 93 for LOIs [2022-12-14 11:25:05,245 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-12-14 11:25:05,309 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 98 for LOIs [2022-12-14 11:25:05,402 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 91 for LOIs [2022-12-14 11:25:05,423 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 91 for LOIs [2022-12-14 11:25:05,443 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:25:48,400 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '83550#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (<= 0 (+ ~s1s1_new~0 1)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (<= 0 (+ ~s2s2_new~0 1)) (= ~cs1~0 0) (<= 0 (+ ~s2s1_new~0 1)) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (<= ~manual_selection_History_0~0 127) (<= 0 (+ ~s2p_new~0 1)) (<= 0 ~side2_written~0) (<= ~manual_selection_History_1~0 127) (= ~s1s1~0 0) (<= ~active_side_History_1~0 127) (<= 0 (+ ~s1s2_new~0 1)) (exists ((|v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_451| Int)) (and (<= 0 |v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_451|) (= (ite (= |v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_451| 0) 0 1) |assert_#in~arg|) (<= |v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_451| 1))) (<= 0 ~active_side_History_0~0) (= assert_~arg |assert_#in~arg|) (<= (+ ~cs2_new~0 1) 0) (<= (+ ~s1s2_new~0 1) 0) (= ~s2s2~0 0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ ~s2s1_new~0 1) 0) (<= ~active_side_History_0~0 2) (= (mod assert_~arg 256) 0) (<= (+ ~nomsg~0 1) 0) (= ~s1s2~0 0) (<= 0 (+ ~cs1_new~0 1)) (<= (+ ~cs1_new~0 1) 0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 (+ ~manual_selection_History_1~0 128)) (<= 0 (+ 2 ~active_side_History_2~0)) (<= 0 (+ ~side1_written~0 1)) (<= ~side2_written~0 0) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (<= 0 |#StackHeapBarrier|) (<= (+ ~s2p_new~0 1) 0) (= ~s2p~0 0) (<= (+ ~s2s2_new~0 1) 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-12-14 11:25:48,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:25:48,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:25:48,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2022-12-14 11:25:48,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756993547] [2022-12-14 11:25:48,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:25:48,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 11:25:48,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:25:48,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 11:25:48,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=7109, Unknown=0, NotChecked=0, Total=8010 [2022-12-14 11:25:48,404 INFO L87 Difference]: Start difference. First operand 1033 states and 1250 transitions. Second operand has 25 states, 25 states have (on average 7.72) internal successors, (193), 25 states have internal predecessors, (193), 10 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 10 states have call predecessors, (46), 10 states have call successors, (46) [2022-12-14 11:25:59,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:25:59,368 INFO L93 Difference]: Finished difference Result 4218 states and 5755 transitions. [2022-12-14 11:25:59,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-12-14 11:25:59,370 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 7.72) internal successors, (193), 25 states have internal predecessors, (193), 10 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 10 states have call predecessors, (46), 10 states have call successors, (46) Word has length 143 [2022-12-14 11:25:59,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:25:59,378 INFO L225 Difference]: With dead ends: 4218 [2022-12-14 11:25:59,379 INFO L226 Difference]: Without dead ends: 3438 [2022-12-14 11:25:59,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 344 SyntacticMatches, 16 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16653 ImplicationChecksByTransitivity, 49.2s TimeCoverageRelationStatistics Valid=3925, Invalid=34687, Unknown=0, NotChecked=0, Total=38612 [2022-12-14 11:25:59,382 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 4497 mSDsluCounter, 3267 mSDsCounter, 0 mSdLazyCounter, 4203 mSolverCounterSat, 2968 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4497 SdHoareTripleChecker+Valid, 3587 SdHoareTripleChecker+Invalid, 7171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2968 IncrementalHoareTripleChecker+Valid, 4203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:25:59,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4497 Valid, 3587 Invalid, 7171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2968 Valid, 4203 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-12-14 11:25:59,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3438 states. [2022-12-14 11:25:59,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3438 to 1781. [2022-12-14 11:25:59,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1781 states, 1323 states have (on average 1.2063492063492063) internal successors, (1596), 1336 states have internal predecessors, (1596), 276 states have call successors, (276), 181 states have call predecessors, (276), 181 states have return successors, (276), 263 states have call predecessors, (276), 276 states have call successors, (276) [2022-12-14 11:25:59,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 2148 transitions. [2022-12-14 11:25:59,881 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 2148 transitions. Word has length 143 [2022-12-14 11:25:59,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:25:59,881 INFO L495 AbstractCegarLoop]: Abstraction has 1781 states and 2148 transitions. [2022-12-14 11:25:59,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.72) internal successors, (193), 25 states have internal predecessors, (193), 10 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 10 states have call predecessors, (46), 10 states have call successors, (46) [2022-12-14 11:25:59,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 2148 transitions. [2022-12-14 11:25:59,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 11:25:59,882 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:25:59,883 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:25:59,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 11:26:00,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-14 11:26:00,084 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:26:00,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:26:00,085 INFO L85 PathProgramCache]: Analyzing trace with hash -2019745929, now seen corresponding path program 1 times [2022-12-14 11:26:00,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:26:00,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905624912] [2022-12-14 11:26:00,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:00,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:26:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-12-14 11:26:00,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:26:00,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905624912] [2022-12-14 11:26:00,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905624912] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:26:00,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:26:00,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 11:26:00,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683973069] [2022-12-14 11:26:00,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:26:00,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:26:00,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:26:00,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:26:00,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:26:00,211 INFO L87 Difference]: Start difference. First operand 1781 states and 2148 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 11:26:01,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:26:01,915 INFO L93 Difference]: Finished difference Result 6053 states and 7822 transitions. [2022-12-14 11:26:01,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 11:26:01,916 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 144 [2022-12-14 11:26:01,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:26:01,926 INFO L225 Difference]: With dead ends: 6053 [2022-12-14 11:26:01,926 INFO L226 Difference]: Without dead ends: 4500 [2022-12-14 11:26:01,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-12-14 11:26:01,928 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 559 mSDsluCounter, 1606 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 1965 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:26:01,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 1965 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:26:01,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4500 states. [2022-12-14 11:26:02,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4500 to 3071. [2022-12-14 11:26:02,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3071 states, 2259 states have (on average 1.2000885347498893) internal successors, (2711), 2284 states have internal predecessors, (2711), 498 states have call successors, (498), 313 states have call predecessors, (498), 313 states have return successors, (498), 473 states have call predecessors, (498), 498 states have call successors, (498) [2022-12-14 11:26:02,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3071 states to 3071 states and 3707 transitions. [2022-12-14 11:26:02,990 INFO L78 Accepts]: Start accepts. Automaton has 3071 states and 3707 transitions. Word has length 144 [2022-12-14 11:26:02,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:26:02,990 INFO L495 AbstractCegarLoop]: Abstraction has 3071 states and 3707 transitions. [2022-12-14 11:26:02,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 11:26:02,990 INFO L276 IsEmpty]: Start isEmpty. Operand 3071 states and 3707 transitions. [2022-12-14 11:26:02,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 11:26:02,992 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:26:02,992 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:26:02,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-12-14 11:26:02,992 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:26:02,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:26:02,992 INFO L85 PathProgramCache]: Analyzing trace with hash 64954108, now seen corresponding path program 1 times [2022-12-14 11:26:02,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:26:02,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517381280] [2022-12-14 11:26:02,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:02,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:26:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:03,184 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 11:26:03,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:26:03,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517381280] [2022-12-14 11:26:03,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517381280] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:26:03,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451820766] [2022-12-14 11:26:03,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:03,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:03,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:26:03,186 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:26:03,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 11:26:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:03,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 11:26:03,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:26:03,738 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 59 proven. 18 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 11:26:03,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:26:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 11:26:04,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451820766] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:26:04,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1100507871] [2022-12-14 11:26:04,076 INFO L159 IcfgInterpreter]: Started Sifa with 80 locations of interest [2022-12-14 11:26:04,076 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:26:04,076 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:26:04,077 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:26:04,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:26:21,431 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 56 for LOIs [2022-12-14 11:26:21,468 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 89 for LOIs [2022-12-14 11:26:21,474 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 132 for LOIs [2022-12-14 11:26:21,691 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 106 for LOIs [2022-12-14 11:26:21,800 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 122 for LOIs [2022-12-14 11:26:21,857 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 88 for LOIs [2022-12-14 11:26:21,877 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:26:52,894 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '104566#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (<= 0 (+ ~s1s1_new~0 1)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (<= 0 (+ ~s2s2_new~0 1)) (= ~cs1~0 0) (<= 0 (+ ~s2s1_new~0 1)) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (<= ~manual_selection_History_0~0 127) (<= 0 (+ ~s2p_new~0 1)) (= |assert_#in~arg| 0) (<= ~manual_selection_History_1~0 127) (= ~s1s1~0 0) (<= ~active_side_History_1~0 127) (<= 0 (+ ~s1s2_new~0 1)) (<= 0 ~active_side_History_0~0) (= assert_~arg |assert_#in~arg|) (<= (+ ~cs2_new~0 1) 0) (<= (+ ~s1s2_new~0 1) 0) (not (= (mod ~side1Failed_History_1~0 256) 0)) (= ~s2s2~0 0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ ~s2s1_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) 0) (<= ~active_side_History_0~0 2) (not (= 2 ~active_side_History_0~0)) (<= (+ ~nomsg~0 1) 0) (<= 0 (+ ~side2_written~0 1)) (= ~s1s2~0 0) (<= 0 (+ ~cs1_new~0 1)) (<= (+ ~cs1_new~0 1) 0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 (+ ~manual_selection_History_1~0 128)) (<= 0 (+ 2 ~active_side_History_2~0)) (<= 0 (+ ~side1_written~0 1)) (<= ~side2_written~0 0) (<= ~side1_written~0 1) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= 0 |#StackHeapBarrier|) (<= (+ ~s2p_new~0 1) 0) (= ~s2p~0 0) (<= (+ ~s2s2_new~0 1) 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-12-14 11:26:52,895 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:26:52,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:26:52,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 9] total 24 [2022-12-14 11:26:52,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344927444] [2022-12-14 11:26:52,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:26:52,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 11:26:52,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:26:52,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 11:26:52,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=654, Invalid=7902, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 11:26:52,897 INFO L87 Difference]: Start difference. First operand 3071 states and 3707 transitions. Second operand has 24 states, 24 states have (on average 8.625) internal successors, (207), 24 states have internal predecessors, (207), 9 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 9 states have call predecessors, (46), 9 states have call successors, (46) [2022-12-14 11:27:15,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:27:15,172 INFO L93 Difference]: Finished difference Result 12976 states and 17573 transitions. [2022-12-14 11:27:15,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2022-12-14 11:27:15,173 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 8.625) internal successors, (207), 24 states have internal predecessors, (207), 9 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 9 states have call predecessors, (46), 9 states have call successors, (46) Word has length 146 [2022-12-14 11:27:15,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:27:15,204 INFO L225 Difference]: With dead ends: 12976 [2022-12-14 11:27:15,204 INFO L226 Difference]: Without dead ends: 10133 [2022-12-14 11:27:15,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 366 SyntacticMatches, 10 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29255 ImplicationChecksByTransitivity, 43.2s TimeCoverageRelationStatistics Valid=5387, Invalid=64045, Unknown=0, NotChecked=0, Total=69432 [2022-12-14 11:27:15,220 INFO L413 NwaCegarLoop]: 445 mSDtfsCounter, 4230 mSDsluCounter, 3859 mSDsCounter, 0 mSdLazyCounter, 7567 mSolverCounterSat, 3523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4230 SdHoareTripleChecker+Valid, 4304 SdHoareTripleChecker+Invalid, 11090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3523 IncrementalHoareTripleChecker+Valid, 7567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:27:15,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4230 Valid, 4304 Invalid, 11090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3523 Valid, 7567 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-12-14 11:27:15,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10133 states. [2022-12-14 11:27:16,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10133 to 4505. [2022-12-14 11:27:16,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4505 states, 3351 states have (on average 1.2163533273649656) internal successors, (4076), 3383 states have internal predecessors, (4076), 701 states have call successors, (701), 452 states have call predecessors, (701), 452 states have return successors, (701), 669 states have call predecessors, (701), 701 states have call successors, (701) [2022-12-14 11:27:16,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 5478 transitions. [2022-12-14 11:27:16,552 INFO L78 Accepts]: Start accepts. Automaton has 4505 states and 5478 transitions. Word has length 146 [2022-12-14 11:27:16,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:27:16,552 INFO L495 AbstractCegarLoop]: Abstraction has 4505 states and 5478 transitions. [2022-12-14 11:27:16,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.625) internal successors, (207), 24 states have internal predecessors, (207), 9 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 9 states have call predecessors, (46), 9 states have call successors, (46) [2022-12-14 11:27:16,552 INFO L276 IsEmpty]: Start isEmpty. Operand 4505 states and 5478 transitions. [2022-12-14 11:27:16,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 11:27:16,554 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:27:16,554 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:27:16,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 11:27:16,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-14 11:27:16,755 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:27:16,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:27:16,755 INFO L85 PathProgramCache]: Analyzing trace with hash 910332236, now seen corresponding path program 1 times [2022-12-14 11:27:16,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:27:16,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493711698] [2022-12-14 11:27:16,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:27:16,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:27:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:27:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 11:27:17,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:27:17,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493711698] [2022-12-14 11:27:17,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493711698] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:27:17,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445751591] [2022-12-14 11:27:17,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:27:17,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:27:17,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:27:17,386 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:27:17,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd74778-4f4e-40c6-b99e-5262653d7980/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 11:27:17,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:27:17,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-14 11:27:17,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:27:18,297 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 72 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 11:27:18,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:27:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-12-14 11:27:19,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445751591] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:27:19,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [957421298] [2022-12-14 11:27:19,436 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2022-12-14 11:27:19,436 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:27:19,436 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:27:19,436 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:27:19,436 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:27:37,921 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 56 for LOIs [2022-12-14 11:27:37,956 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 89 for LOIs [2022-12-14 11:27:37,961 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 117 for LOIs [2022-12-14 11:27:38,037 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 105 for LOIs [2022-12-14 11:27:38,125 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 121 for LOIs [2022-12-14 11:27:38,185 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 88 for LOIs [2022-12-14 11:27:38,206 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:28:12,776 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '128875#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (<= 0 (+ ~s1s1_new~0 1)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (<= 0 (+ ~s2s2_new~0 1)) (= ~cs1~0 0) (<= 0 (+ ~s2s1_new~0 1)) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (<= ~manual_selection_History_0~0 127) (<= 0 (+ ~s2p_new~0 1)) (= |assert_#in~arg| 0) (<= ~manual_selection_History_1~0 127) (= ~s1s1~0 0) (<= ~active_side_History_1~0 127) (<= 0 (+ ~s1s2_new~0 1)) (<= 0 ~active_side_History_0~0) (= assert_~arg |assert_#in~arg|) (<= (+ ~cs2_new~0 1) 0) (<= (+ ~s1s2_new~0 1) 0) (= ~s2s2~0 0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ ~s2s1_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) 0) (<= ~active_side_History_0~0 2) (not (= 2 ~active_side_History_0~0)) (<= (+ ~nomsg~0 1) 0) (<= 0 (+ ~side2_written~0 1)) (= ~s1s2~0 0) (<= 0 (+ ~cs1_new~0 1)) (<= (+ ~cs1_new~0 1) 0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 (+ ~manual_selection_History_1~0 128)) (<= 0 (+ 2 ~active_side_History_2~0)) (<= 0 (+ ~side1_written~0 1)) (<= ~side2_written~0 0) (<= ~side1_written~0 1) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= 0 |#StackHeapBarrier|) (<= (+ ~s2p_new~0 1) 0) (= ~s2p~0 0) (<= (+ ~s2s2_new~0 1) 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-12-14 11:28:12,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:28:12,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:28:12,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 17] total 32 [2022-12-14 11:28:12,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035825655] [2022-12-14 11:28:12,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:28:12,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 11:28:12,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:28:12,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 11:28:12,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=9151, Unknown=0, NotChecked=0, Total=9900 [2022-12-14 11:28:12,778 INFO L87 Difference]: Start difference. First operand 4505 states and 5478 transitions. Second operand has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 11 states have call successors, (52), 5 states have call predecessors, (52), 6 states have return successors, (51), 12 states have call predecessors, (51), 11 states have call successors, (51)