./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce73694b-df9a-4b04-9e4d-01bd98eae12e/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce73694b-df9a-4b04-9e4d-01bd98eae12e/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce73694b-df9a-4b04-9e4d-01bd98eae12e/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce73694b-df9a-4b04-9e4d-01bd98eae12e/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce73694b-df9a-4b04-9e4d-01bd98eae12e/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce73694b-df9a-4b04-9e4d-01bd98eae12e/bin/utaipan-eEHZpOm5b7 --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 afac0863a681e4712e7bffaf04a415cd693c6153e1fe439605f11a4c250fdcc1 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:48:20,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:48:20,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:48:20,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:48:20,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:48:20,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:48:20,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:48:20,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:48:20,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:48:20,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:48:20,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:48:20,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:48:20,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:48:20,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:48:20,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:48:20,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:48:20,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:48:20,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:48:20,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:48:20,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:48:20,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:48:20,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:48:20,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:48:20,703 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:48:20,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:48:20,712 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:48:20,712 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:48:20,714 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:48:20,715 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:48:20,716 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:48:20,716 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:48:20,717 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:48:20,719 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:48:20,720 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:48:20,722 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:48:20,722 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:48:20,723 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:48:20,723 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:48:20,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:48:20,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:48:20,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:48:20,725 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce73694b-df9a-4b04-9e4d-01bd98eae12e/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:48:20,768 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:48:20,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:48:20,769 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:48:20,769 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:48:20,770 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:48:20,770 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:48:20,770 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:48:20,770 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:48:20,770 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:48:20,771 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:48:20,772 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:48:20,772 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:48:20,772 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:48:20,772 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:48:20,773 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:48:20,773 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:48:20,773 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:48:20,773 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:48:20,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:48:20,774 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:48:20,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:48:20,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:48:20,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:48:20,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:48:20,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:48:20,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:48:20,777 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:48:20,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:48:20,777 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:48:20,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:48:20,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:48:20,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:48:20,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:48:20,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:48:20,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:48:20,779 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:48:20,779 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:48:20,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:48:20,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:48:20,780 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:48:20,780 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:48:20,780 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_ce73694b-df9a-4b04-9e4d-01bd98eae12e/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce73694b-df9a-4b04-9e4d-01bd98eae12e/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> afac0863a681e4712e7bffaf04a415cd693c6153e1fe439605f11a4c250fdcc1 [2021-11-25 19:48:21,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:48:21,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:48:21,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:48:21,126 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:48:21,127 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:48:21,128 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce73694b-df9a-4b04-9e4d-01bd98eae12e/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-11-25 19:48:21,202 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce73694b-df9a-4b04-9e4d-01bd98eae12e/bin/utaipan-eEHZpOm5b7/data/ed198f99d/0834e29e428d4fa8a74d7651dba39e61/FLAG1d528af9c [2021-11-25 19:48:21,729 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:48:21,729 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce73694b-df9a-4b04-9e4d-01bd98eae12e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-11-25 19:48:21,738 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce73694b-df9a-4b04-9e4d-01bd98eae12e/bin/utaipan-eEHZpOm5b7/data/ed198f99d/0834e29e428d4fa8a74d7651dba39e61/FLAG1d528af9c [2021-11-25 19:48:22,077 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce73694b-df9a-4b04-9e4d-01bd98eae12e/bin/utaipan-eEHZpOm5b7/data/ed198f99d/0834e29e428d4fa8a74d7651dba39e61 [2021-11-25 19:48:22,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:48:22,084 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:48:22,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:48:22,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:48:22,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:48:22,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:48:22" (1/1) ... [2021-11-25 19:48:22,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19d5b155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:22, skipping insertion in model container [2021-11-25 19:48:22,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:48:22" (1/1) ... [2021-11-25 19:48:22,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:48:22,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:48:22,374 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce73694b-df9a-4b04-9e4d-01bd98eae12e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4069,4082] [2021-11-25 19:48:22,395 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:48:22,405 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:48:22,433 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce73694b-df9a-4b04-9e4d-01bd98eae12e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4069,4082] [2021-11-25 19:48:22,445 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:48:22,461 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:48:22,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:22 WrapperNode [2021-11-25 19:48:22,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:48:22,463 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:48:22,463 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:48:22,463 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:48:22,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:22" (1/1) ... [2021-11-25 19:48:22,479 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:22" (1/1) ... [2021-11-25 19:48:22,512 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 271 [2021-11-25 19:48:22,518 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:48:22,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:48:22,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:48:22,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:48:22,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:22" (1/1) ... [2021-11-25 19:48:22,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:22" (1/1) ... [2021-11-25 19:48:22,530 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:22" (1/1) ... [2021-11-25 19:48:22,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:22" (1/1) ... [2021-11-25 19:48:22,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:22" (1/1) ... [2021-11-25 19:48:22,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:22" (1/1) ... [2021-11-25 19:48:22,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:22" (1/1) ... [2021-11-25 19:48:22,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:48:22,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:48:22,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:48:22,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:48:22,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:22" (1/1) ... [2021-11-25 19:48:22,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:48:22,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce73694b-df9a-4b04-9e4d-01bd98eae12e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:22,592 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce73694b-df9a-4b04-9e4d-01bd98eae12e/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:48:22,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce73694b-df9a-4b04-9e4d-01bd98eae12e/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:48:22,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:48:22,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:48:22,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:48:22,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:48:22,774 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:48:22,775 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:48:23,154 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:48:23,267 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:48:23,267 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 19:48:23,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:48:23 BoogieIcfgContainer [2021-11-25 19:48:23,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:48:23,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:48:23,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:48:23,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:48:23,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:48:22" (1/3) ... [2021-11-25 19:48:23,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651381da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:48:23, skipping insertion in model container [2021-11-25 19:48:23,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:22" (2/3) ... [2021-11-25 19:48:23,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651381da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:48:23, skipping insertion in model container [2021-11-25 19:48:23,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:48:23" (3/3) ... [2021-11-25 19:48:23,278 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-11-25 19:48:23,283 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:48:23,284 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:48:23,345 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:48:23,353 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:48:23,354 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:48:23,377 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 45 states have (on average 1.711111111111111) internal successors, (77), 46 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:23,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-25 19:48:23,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:23,388 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:23,389 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:23,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:23,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1204296096, now seen corresponding path program 1 times [2021-11-25 19:48:23,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:23,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751700522] [2021-11-25 19:48:23,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:23,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:23,734 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:23,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751700522] [2021-11-25 19:48:23,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751700522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:23,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:23,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:48:23,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607030730] [2021-11-25 19:48:23,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:23,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:48:23,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:23,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:48:23,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:48:23,770 INFO L87 Difference]: Start difference. First operand has 47 states, 45 states have (on average 1.711111111111111) internal successors, (77), 46 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:23,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:23,833 INFO L93 Difference]: Finished difference Result 101 states and 155 transitions. [2021-11-25 19:48:23,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:48:23,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-25 19:48:23,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:23,844 INFO L225 Difference]: With dead ends: 101 [2021-11-25 19:48:23,845 INFO L226 Difference]: Without dead ends: 68 [2021-11-25 19:48:23,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:48:23,851 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 50 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:23,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 133 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:48:23,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-25 19:48:23,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-11-25 19:48:23,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.353846153846154) internal successors, (88), 65 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:23,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 88 transitions. [2021-11-25 19:48:23,893 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 88 transitions. Word has length 29 [2021-11-25 19:48:23,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:23,894 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 88 transitions. [2021-11-25 19:48:23,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:23,895 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 88 transitions. [2021-11-25 19:48:23,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-25 19:48:23,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:23,896 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:23,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:48:23,897 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:23,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:23,898 INFO L85 PathProgramCache]: Analyzing trace with hash 633033209, now seen corresponding path program 1 times [2021-11-25 19:48:23,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:23,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917332872] [2021-11-25 19:48:23,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:23,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:24,050 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:24,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917332872] [2021-11-25 19:48:24,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917332872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:24,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:24,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:48:24,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540871958] [2021-11-25 19:48:24,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:24,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:48:24,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:24,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:48:24,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:48:24,058 INFO L87 Difference]: Start difference. First operand 66 states and 88 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:24,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:24,127 INFO L93 Difference]: Finished difference Result 154 states and 216 transitions. [2021-11-25 19:48:24,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:48:24,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-25 19:48:24,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:24,134 INFO L225 Difference]: With dead ends: 154 [2021-11-25 19:48:24,134 INFO L226 Difference]: Without dead ends: 106 [2021-11-25 19:48:24,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:48:24,140 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 31 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:24,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 106 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:48:24,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-25 19:48:24,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-11-25 19:48:24,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.3883495145631068) internal successors, (143), 103 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:24,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 143 transitions. [2021-11-25 19:48:24,179 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 143 transitions. Word has length 32 [2021-11-25 19:48:24,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:24,182 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 143 transitions. [2021-11-25 19:48:24,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:24,183 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 143 transitions. [2021-11-25 19:48:24,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-25 19:48:24,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:24,185 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:24,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:48:24,186 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:24,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:24,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1444768332, now seen corresponding path program 1 times [2021-11-25 19:48:24,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:24,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032490523] [2021-11-25 19:48:24,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:24,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:24,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:24,286 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:24,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032490523] [2021-11-25 19:48:24,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032490523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:24,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:24,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:48:24,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773153802] [2021-11-25 19:48:24,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:24,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:48:24,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:24,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:48:24,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:48:24,289 INFO L87 Difference]: Start difference. First operand 104 states and 143 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:24,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:24,335 INFO L93 Difference]: Finished difference Result 260 states and 369 transitions. [2021-11-25 19:48:24,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:48:24,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-25 19:48:24,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:24,344 INFO L225 Difference]: With dead ends: 260 [2021-11-25 19:48:24,346 INFO L226 Difference]: Without dead ends: 174 [2021-11-25 19:48:24,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:48:24,349 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 26 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:24,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 102 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:48:24,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-25 19:48:24,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2021-11-25 19:48:24,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.3976608187134503) internal successors, (239), 171 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:24,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 239 transitions. [2021-11-25 19:48:24,401 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 239 transitions. Word has length 35 [2021-11-25 19:48:24,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:24,403 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 239 transitions. [2021-11-25 19:48:24,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:24,403 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 239 transitions. [2021-11-25 19:48:24,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-25 19:48:24,405 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:24,405 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:24,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:48:24,406 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:24,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:24,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1397414868, now seen corresponding path program 1 times [2021-11-25 19:48:24,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:24,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986829270] [2021-11-25 19:48:24,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:24,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:24,527 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:24,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986829270] [2021-11-25 19:48:24,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986829270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:24,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:24,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:48:24,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971745023] [2021-11-25 19:48:24,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:24,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:48:24,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:24,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:48:24,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:48:24,531 INFO L87 Difference]: Start difference. First operand 172 states and 239 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:24,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:24,731 INFO L93 Difference]: Finished difference Result 664 states and 938 transitions. [2021-11-25 19:48:24,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:48:24,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-25 19:48:24,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:24,738 INFO L225 Difference]: With dead ends: 664 [2021-11-25 19:48:24,740 INFO L226 Difference]: Without dead ends: 510 [2021-11-25 19:48:24,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:48:24,744 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 200 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:24,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 343 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:48:24,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-11-25 19:48:24,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 256. [2021-11-25 19:48:24,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.388235294117647) internal successors, (354), 255 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:24,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 354 transitions. [2021-11-25 19:48:24,806 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 354 transitions. Word has length 38 [2021-11-25 19:48:24,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:24,807 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 354 transitions. [2021-11-25 19:48:24,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:24,807 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 354 transitions. [2021-11-25 19:48:24,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-25 19:48:24,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:24,810 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:24,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:48:24,811 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:24,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:24,812 INFO L85 PathProgramCache]: Analyzing trace with hash 491959274, now seen corresponding path program 1 times [2021-11-25 19:48:24,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:24,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730102778] [2021-11-25 19:48:24,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:24,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:24,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:24,864 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:24,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730102778] [2021-11-25 19:48:24,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730102778] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:24,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:24,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:48:24,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166484948] [2021-11-25 19:48:24,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:24,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:48:24,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:24,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:48:24,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:48:24,867 INFO L87 Difference]: Start difference. First operand 256 states and 354 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:24,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:24,913 INFO L93 Difference]: Finished difference Result 642 states and 904 transitions. [2021-11-25 19:48:24,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:48:24,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-25 19:48:24,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:24,917 INFO L225 Difference]: With dead ends: 642 [2021-11-25 19:48:24,917 INFO L226 Difference]: Without dead ends: 404 [2021-11-25 19:48:24,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:48:24,919 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 20 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:24,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 85 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:48:24,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-11-25 19:48:24,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 402. [2021-11-25 19:48:24,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.401496259351621) internal successors, (562), 401 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:24,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 562 transitions. [2021-11-25 19:48:24,954 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 562 transitions. Word has length 40 [2021-11-25 19:48:24,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:24,955 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 562 transitions. [2021-11-25 19:48:24,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:24,955 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 562 transitions. [2021-11-25 19:48:24,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-25 19:48:24,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:24,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:24,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:48:24,957 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:24,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:24,957 INFO L85 PathProgramCache]: Analyzing trace with hash 508254951, now seen corresponding path program 1 times [2021-11-25 19:48:24,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:24,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375966306] [2021-11-25 19:48:24,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:24,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:25,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:25,079 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:25,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375966306] [2021-11-25 19:48:25,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375966306] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:25,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:25,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:48:25,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130282966] [2021-11-25 19:48:25,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:25,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:48:25,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:25,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:48:25,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:48:25,082 INFO L87 Difference]: Start difference. First operand 402 states and 562 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:25,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:25,212 INFO L93 Difference]: Finished difference Result 786 states and 1105 transitions. [2021-11-25 19:48:25,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:48:25,213 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-25 19:48:25,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:25,216 INFO L225 Difference]: With dead ends: 786 [2021-11-25 19:48:25,216 INFO L226 Difference]: Without dead ends: 404 [2021-11-25 19:48:25,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:48:25,218 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 70 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:25,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 157 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:48:25,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-11-25 19:48:25,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 402. [2021-11-25 19:48:25,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.3965087281795512) internal successors, (560), 401 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:25,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 560 transitions. [2021-11-25 19:48:25,254 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 560 transitions. Word has length 40 [2021-11-25 19:48:25,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:25,254 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 560 transitions. [2021-11-25 19:48:25,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:25,255 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 560 transitions. [2021-11-25 19:48:25,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-25 19:48:25,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:25,256 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:25,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:48:25,256 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:25,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:25,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1421168151, now seen corresponding path program 1 times [2021-11-25 19:48:25,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:25,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207446169] [2021-11-25 19:48:25,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:25,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:25,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:25,322 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:25,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207446169] [2021-11-25 19:48:25,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207446169] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:25,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:25,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:48:25,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871569109] [2021-11-25 19:48:25,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:25,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:48:25,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:25,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:48:25,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:48:25,324 INFO L87 Difference]: Start difference. First operand 402 states and 560 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:25,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:25,416 INFO L93 Difference]: Finished difference Result 784 states and 1100 transitions. [2021-11-25 19:48:25,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:48:25,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-25 19:48:25,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:25,420 INFO L225 Difference]: With dead ends: 784 [2021-11-25 19:48:25,420 INFO L226 Difference]: Without dead ends: 402 [2021-11-25 19:48:25,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:48:25,422 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 126 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:25,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 44 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:48:25,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-25 19:48:25,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 402. [2021-11-25 19:48:25,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.371571072319202) internal successors, (550), 401 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:25,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 550 transitions. [2021-11-25 19:48:25,486 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 550 transitions. Word has length 41 [2021-11-25 19:48:25,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:25,487 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 550 transitions. [2021-11-25 19:48:25,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:25,487 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 550 transitions. [2021-11-25 19:48:25,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-25 19:48:25,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:25,489 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:25,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 19:48:25,489 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:25,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:25,490 INFO L85 PathProgramCache]: Analyzing trace with hash -555635762, now seen corresponding path program 1 times [2021-11-25 19:48:25,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:25,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004952416] [2021-11-25 19:48:25,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:25,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:25,632 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:25,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004952416] [2021-11-25 19:48:25,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004952416] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:25,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:25,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:48:25,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627020516] [2021-11-25 19:48:25,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:25,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:48:25,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:25,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:48:25,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:48:25,636 INFO L87 Difference]: Start difference. First operand 402 states and 550 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:25,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:25,823 INFO L93 Difference]: Finished difference Result 521 states and 703 transitions. [2021-11-25 19:48:25,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 19:48:25,824 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-25 19:48:25,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:25,829 INFO L225 Difference]: With dead ends: 521 [2021-11-25 19:48:25,832 INFO L226 Difference]: Without dead ends: 519 [2021-11-25 19:48:25,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:48:25,834 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 86 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:25,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 301 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:48:25,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-11-25 19:48:25,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 402. [2021-11-25 19:48:25,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.3615960099750624) internal successors, (546), 401 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:25,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 546 transitions. [2021-11-25 19:48:25,889 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 546 transitions. Word has length 41 [2021-11-25 19:48:25,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:25,894 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 546 transitions. [2021-11-25 19:48:25,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:25,894 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 546 transitions. [2021-11-25 19:48:25,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 19:48:25,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:25,899 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:48:25,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 19:48:25,900 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:25,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:25,900 INFO L85 PathProgramCache]: Analyzing trace with hash -435507294, now seen corresponding path program 1 times [2021-11-25 19:48:25,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:25,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875043354] [2021-11-25 19:48:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:25,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:28,491 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:28,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875043354] [2021-11-25 19:48:28,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875043354] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:28,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764028784] [2021-11-25 19:48:28,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:28,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:28,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce73694b-df9a-4b04-9e4d-01bd98eae12e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:28,501 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce73694b-df9a-4b04-9e4d-01bd98eae12e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:28,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce73694b-df9a-4b04-9e4d-01bd98eae12e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:48:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:28,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-25 19:48:28,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:34,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:49:59,034 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:49:59,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764028784] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:49:59,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [535469343] [2021-11-25 19:49:59,052 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2021-11-25 19:49:59,052 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:49:59,056 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:49:59,061 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:49:59,062 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:49:59,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:59,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:59,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-25 19:49:59,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:59,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:59,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:59,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-25 19:50:17,610 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:50:31,864 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10304#(and (<= ~p3~0 0) (= |ULTIMATE.start_main_~check__tmp~0#1| ~__return_1487~0) (<= 0 ~id3~0) (<= ~__return_1543~0 0) (<= 0 |#NULL.base|) (<= 0 ~mode1~0) (<= |ULTIMATE.start_main_~main__i2~0#1| 6) (<= 0 ~id1~0) (<= (+ ~p1_new~0 1) 0) (<= 0 ~mode3~0) (= ~p3_new~0 ~nomsg~0) (<= 0 |ULTIMATE.start_main_~main__i2~0#1|) (<= |#NULL.offset| 0) (<= ~mode2~0 1) (<= 0 ~st2~0) (<= ~p1~0 0) (<= ~__return_main~0 0) (<= ~mode3~0 1) (<= 0 ~p2~0) (<= 0 ~p3~0) (<= 0 ~send2~0) (<= ~id1~0 127) (< 1 (+ ~st3~0 ~st2~0 ~st1~0)) (<= 1 ~__return_1411~0) (<= 0 (+ ~p2_new~0 1)) (<= ~mode1~0 1) (= |ULTIMATE.start_main_~assert__arg~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= (+ ~p2_new~0 1) 0) (<= |#NULL.base| 0) (<= 0 ~__return_1543~0) (<= 0 ~__return_main~0) (<= ~id3~0 127) (<= 0 ~id2~0) (<= 0 (+ ~nomsg~0 1)) (<= ~p2~0 0) (<= 0 ~mode2~0) (= |ULTIMATE.start_main_~main__c1~0#1| ~__return_1487~0) (<= ~id2~0 127) (<= 0 ~st3~0) (<= (+ ~p3_new~0 1) 0) (<= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |#NULL.offset|) (<= 0 (+ ~p1_new~0 1)) (= (ite (= |ULTIMATE.start_main_~main__c1~0#1| 0) 0 1) |ULTIMATE.start_main_~__tmp_1~0#1|) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= 0 ~send3~0) (<= ~__return_1411~0 1) (<= 0 ~p1~0) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_main_~init__tmp~0#1|))' at error location [2021-11-25 19:50:31,864 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:50:31,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:50:31,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 65 [2021-11-25 19:50:31,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633555246] [2021-11-25 19:50:31,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:50:31,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-25 19:50:31,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:50:31,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-25 19:50:31,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1236, Invalid=9270, Unknown=0, NotChecked=0, Total=10506 [2021-11-25 19:50:31,871 INFO L87 Difference]: Start difference. First operand 402 states and 546 transitions. Second operand has 65 states, 65 states have (on average 2.230769230769231) internal successors, (145), 65 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:51:05,519 WARN L227 SmtUtils]: Spent 8.30s on a formula simplification. DAG size of input: 741 DAG size of output: 461 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:51:12,747 WARN L227 SmtUtils]: Spent 5.46s on a formula simplification. DAG size of input: 597 DAG size of output: 351 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:51:21,543 WARN L227 SmtUtils]: Spent 7.34s on a formula simplification. DAG size of input: 680 DAG size of output: 421 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:52:26,723 WARN L227 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 884 DAG size of output: 255 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:53:09,311 WARN L227 SmtUtils]: Spent 7.03s on a formula simplification. DAG size of input: 927 DAG size of output: 274 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:53:41,627 WARN L227 SmtUtils]: Spent 5.20s on a formula simplification. DAG size of input: 781 DAG size of output: 228 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:54:57,655 WARN L227 SmtUtils]: Spent 8.80s on a formula simplification. DAG size of input: 732 DAG size of output: 473 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:55:46,303 WARN L227 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 588 DAG size of output: 363 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:56:42,844 WARN L227 SmtUtils]: Spent 5.71s on a formula simplification. DAG size of input: 783 DAG size of output: 239 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:57:16,138 WARN L227 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 808 DAG size of output: 251 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:58:12,179 WARN L227 SmtUtils]: Spent 8.02s on a formula simplification. DAG size of input: 952 DAG size of output: 286 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:59:02,024 WARN L227 SmtUtils]: Spent 9.76s on a formula simplification. DAG size of input: 753 DAG size of output: 482 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:59:18,942 WARN L227 SmtUtils]: Spent 6.75s on a formula simplification. DAG size of input: 891 DAG size of output: 257 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:59:40,005 WARN L227 SmtUtils]: Spent 6.28s on a formula simplification. DAG size of input: 865 DAG size of output: 246 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:00:10,862 WARN L227 SmtUtils]: Spent 7.21s on a formula simplification. DAG size of input: 916 DAG size of output: 269 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:00:27,160 WARN L227 SmtUtils]: Spent 12.17s on a formula simplification. DAG size of input: 873 DAG size of output: 586 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)