./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal57.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal57.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 9be67a2dd8530a66f1036afdfdb19835d7e01c5ffc65f4ebaab799190bdae8fe --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:39:45,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:39:45,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:39:45,732 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:39:45,733 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:39:45,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:39:45,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:39:45,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:39:45,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:39:45,742 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:39:45,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:39:45,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:39:45,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:39:45,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:39:45,746 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:39:45,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:39:45,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:39:45,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:39:45,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:39:45,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:39:45,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:39:45,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:39:45,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:39:45,756 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:39:45,760 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:39:45,760 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:39:45,760 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:39:45,761 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:39:45,762 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:39:45,762 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:39:45,763 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:39:45,763 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:39:45,764 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:39:45,765 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:39:45,766 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:39:45,766 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:39:45,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:39:45,767 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:39:45,767 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:39:45,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:39:45,769 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:39:45,770 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 01:39:45,794 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:39:45,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:39:45,795 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:39:45,795 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:39:45,795 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:39:45,796 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:39:45,796 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:39:45,796 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:39:45,796 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:39:45,797 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:39:45,797 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:39:45,797 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:39:45,797 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:39:45,797 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:39:45,798 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:39:45,798 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:39:45,798 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:39:45,798 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:39:45,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:39:45,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:39:45,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:39:45,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:39:45,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:39:45,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:39:45,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:39:45,800 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:39:45,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:39:45,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:39:45,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:39:45,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:39:45,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:39:45,801 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:39:45,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:39:45,802 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:39:45,802 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:39:45,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:39:45,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:39:45,802 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:39:45,803 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9be67a2dd8530a66f1036afdfdb19835d7e01c5ffc65f4ebaab799190bdae8fe [2022-11-03 01:39:46,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:39:46,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:39:46,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:39:46,123 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:39:46,124 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:39:46,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal57.c [2022-11-03 01:39:46,205 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/data/7e182701d/c0c8337a4ef349bea34439464b1cc343/FLAGf2aaf9915 [2022-11-03 01:39:46,668 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:39:46,668 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal57.c [2022-11-03 01:39:46,677 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/data/7e182701d/c0c8337a4ef349bea34439464b1cc343/FLAGf2aaf9915 [2022-11-03 01:39:46,705 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/data/7e182701d/c0c8337a4ef349bea34439464b1cc343 [2022-11-03 01:39:46,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:39:46,709 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:39:46,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:39:46,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:39:46,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:39:46,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:39:46" (1/1) ... [2022-11-03 01:39:46,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36d5347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:46, skipping insertion in model container [2022-11-03 01:39:46,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:39:46" (1/1) ... [2022-11-03 01:39:46,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:39:46,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:39:46,960 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_680403e7-a4c4-4b16-bab0-375dee8e63c9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal57.c[1107,1120] [2022-11-03 01:39:47,021 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:39:47,024 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:39:47,033 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_680403e7-a4c4-4b16-bab0-375dee8e63c9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal57.c[1107,1120] [2022-11-03 01:39:47,060 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:39:47,072 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:39:47,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:47 WrapperNode [2022-11-03 01:39:47,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:39:47,073 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:39:47,073 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:39:47,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:39:47,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:47" (1/1) ... [2022-11-03 01:39:47,089 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:47" (1/1) ... [2022-11-03 01:39:47,124 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 214 [2022-11-03 01:39:47,125 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:39:47,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:39:47,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:39:47,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:39:47,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:47" (1/1) ... [2022-11-03 01:39:47,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:47" (1/1) ... [2022-11-03 01:39:47,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:47" (1/1) ... [2022-11-03 01:39:47,142 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:47" (1/1) ... [2022-11-03 01:39:47,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:47" (1/1) ... [2022-11-03 01:39:47,153 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:47" (1/1) ... [2022-11-03 01:39:47,156 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:47" (1/1) ... [2022-11-03 01:39:47,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:47" (1/1) ... [2022-11-03 01:39:47,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:39:47,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:39:47,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:39:47,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:39:47,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:47" (1/1) ... [2022-11-03 01:39:47,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:39:47,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:39:47,216 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:39:47,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:39:47,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:39:47,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:39:47,357 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:39:47,360 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:39:47,772 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:39:48,096 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:39:48,097 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:39:48,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:39:48 BoogieIcfgContainer [2022-11-03 01:39:48,100 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:39:48,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:39:48,103 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:39:48,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:39:48,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:39:46" (1/3) ... [2022-11-03 01:39:48,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a8ca17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:39:48, skipping insertion in model container [2022-11-03 01:39:48,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:47" (2/3) ... [2022-11-03 01:39:48,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a8ca17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:39:48, skipping insertion in model container [2022-11-03 01:39:48,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:39:48" (3/3) ... [2022-11-03 01:39:48,109 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.cal57.c [2022-11-03 01:39:48,130 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:39:48,130 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:39:48,176 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:39:48,182 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@36fb3edc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:39:48,183 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:39:48,187 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:39:48,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 01:39:48,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:48,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 01:39:48,194 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:48,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:48,200 INFO L85 PathProgramCache]: Analyzing trace with hash 4854877, now seen corresponding path program 1 times [2022-11-03 01:39:48,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:39:48,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53805829] [2022-11-03 01:39:48,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:48,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:39:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:39:48,576 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 01:39:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:39:48,843 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 01:39:48,846 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 01:39:48,848 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 01:39:48,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:39:48,854 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 01:39:48,858 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 01:39:48,888 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 01:39:48,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 01:39:48 BoogieIcfgContainer [2022-11-03 01:39:48,900 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 01:39:48,903 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 01:39:48,903 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 01:39:48,903 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 01:39:48,904 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:39:48" (3/4) ... [2022-11-03 01:39:48,908 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 01:39:48,908 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 01:39:48,910 INFO L158 Benchmark]: Toolchain (without parser) took 2200.23ms. Allocated memory is still 142.6MB. Free memory was 107.1MB in the beginning and 70.8MB in the end (delta: 36.2MB). Peak memory consumption was 37.5MB. Max. memory is 16.1GB. [2022-11-03 01:39:48,911 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 92.3MB. Free memory was 62.5MB in the beginning and 62.5MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:39:48,911 INFO L158 Benchmark]: CACSL2BoogieTranslator took 360.49ms. Allocated memory is still 142.6MB. Free memory was 106.6MB in the beginning and 114.7MB in the end (delta: -8.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 01:39:48,913 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.56ms. Allocated memory is still 142.6MB. Free memory was 114.2MB in the beginning and 111.5MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 01:39:48,914 INFO L158 Benchmark]: Boogie Preprocessor took 35.53ms. Allocated memory is still 142.6MB. Free memory was 111.5MB in the beginning and 109.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 01:39:48,918 INFO L158 Benchmark]: RCFGBuilder took 938.21ms. Allocated memory is still 142.6MB. Free memory was 109.4MB in the beginning and 114.8MB in the end (delta: -5.4MB). Peak memory consumption was 61.4MB. Max. memory is 16.1GB. [2022-11-03 01:39:48,919 INFO L158 Benchmark]: TraceAbstraction took 797.35ms. Allocated memory is still 142.6MB. Free memory was 114.7MB in the beginning and 70.8MB in the end (delta: 43.9MB). Peak memory consumption was 44.0MB. Max. memory is 16.1GB. [2022-11-03 01:39:48,921 INFO L158 Benchmark]: Witness Printer took 6.31ms. Allocated memory is still 142.6MB. Free memory is still 70.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:39:48,928 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 92.3MB. Free memory was 62.5MB in the beginning and 62.5MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 360.49ms. Allocated memory is still 142.6MB. Free memory was 106.6MB in the beginning and 114.7MB in the end (delta: -8.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.56ms. Allocated memory is still 142.6MB. Free memory was 114.2MB in the beginning and 111.5MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.53ms. Allocated memory is still 142.6MB. Free memory was 111.5MB in the beginning and 109.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 938.21ms. Allocated memory is still 142.6MB. Free memory was 109.4MB in the beginning and 114.8MB in the end (delta: -5.4MB). Peak memory consumption was 61.4MB. Max. memory is 16.1GB. * TraceAbstraction took 797.35ms. Allocated memory is still 142.6MB. Free memory was 114.7MB in the beginning and 70.8MB in the end (delta: 43.9MB). Peak memory consumption was 44.0MB. Max. memory is 16.1GB. * Witness Printer took 6.31ms. Allocated memory is still 142.6MB. Free memory is still 70.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 73, overapproximation of bitwiseOr at line 95, overapproximation of bitwiseAnd at line 61. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_5 mask_SORT_5 = (SORT_5)-1 >> (sizeof(SORT_5) * 8 - 3); [L29] const SORT_5 msb_SORT_5 = (SORT_5)1 << (3 - 1); [L31] const SORT_1 var_11 = 0; [L32] const SORT_5 var_15 = 0; [L33] const SORT_5 var_21 = 1; [L34] const SORT_1 var_31 = 1; [L36] SORT_1 input_2; [L37] SORT_1 input_3; [L38] SORT_1 input_4; [L39] SORT_5 input_6; [L40] SORT_5 input_7; [L41] SORT_1 input_8; [L42] SORT_5 input_9; [L43] SORT_5 input_10; [L45] SORT_1 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L46] SORT_5 state_16 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L47] SORT_1 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L48] SORT_5 state_23 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L50] SORT_1 init_13_arg_1 = var_11; [L51] state_12 = init_13_arg_1 [L52] SORT_5 init_17_arg_1 = var_15; [L53] state_16 = init_17_arg_1 [L54] SORT_1 init_19_arg_1 = var_11; [L55] state_18 = init_19_arg_1 [L56] SORT_5 init_24_arg_1 = var_15; [L57] state_23 = init_24_arg_1 VAL [init_13_arg_1=0, init_17_arg_1=0, init_19_arg_1=0, init_24_arg_1=0, mask_SORT_1=1, mask_SORT_5=7, msb_SORT_1=1, msb_SORT_5=4, state_12=0, state_16=0, state_18=0, state_23=0, var_11=0, var_15=0, var_21=1, var_31=1] [L60] input_2 = __VERIFIER_nondet_uchar() [L61] input_2 = input_2 & mask_SORT_1 [L62] input_3 = __VERIFIER_nondet_uchar() [L63] input_3 = input_3 & mask_SORT_1 [L64] input_4 = __VERIFIER_nondet_uchar() [L65] input_6 = __VERIFIER_nondet_uchar() [L66] input_7 = __VERIFIER_nondet_uchar() [L67] input_8 = __VERIFIER_nondet_uchar() [L68] input_9 = __VERIFIER_nondet_uchar() [L69] input_10 = __VERIFIER_nondet_uchar() [L72] SORT_1 var_14_arg_0 = state_12; [L73] SORT_1 var_14 = ~var_14_arg_0; [L74] SORT_1 var_20_arg_0 = state_18; [L75] SORT_5 var_20_arg_1 = state_16; [L76] SORT_5 var_20_arg_2 = input_7; [L77] EXPR var_20_arg_0 ? var_20_arg_1 : var_20_arg_2 [L77] SORT_5 var_20 = var_20_arg_0 ? var_20_arg_1 : var_20_arg_2; [L78] var_20 = var_20 & mask_SORT_5 [L79] SORT_5 var_22_arg_0 = var_20; [L80] SORT_5 var_22_arg_1 = var_21; [L81] SORT_1 var_22 = var_22_arg_0 == var_22_arg_1; [L82] SORT_1 var_25_arg_0 = state_18; [L83] SORT_5 var_25_arg_1 = state_23; [L84] SORT_5 var_25_arg_2 = input_7; [L85] EXPR var_25_arg_0 ? var_25_arg_1 : var_25_arg_2 [L85] SORT_5 var_25 = var_25_arg_0 ? var_25_arg_1 : var_25_arg_2; [L86] var_25 = var_25 & mask_SORT_5 [L87] SORT_5 var_26_arg_0 = var_25; [L88] SORT_5 var_26_arg_1 = var_21; [L89] SORT_1 var_26 = var_26_arg_0 == var_26_arg_1; [L90] SORT_1 var_27_arg_0 = var_22; [L91] SORT_1 var_27_arg_1 = var_26; [L92] SORT_1 var_27 = var_27_arg_0 == var_27_arg_1; [L93] SORT_1 var_28_arg_0 = var_14; [L94] SORT_1 var_28_arg_1 = var_27; [L95] SORT_1 var_28 = var_28_arg_0 | var_28_arg_1; [L96] SORT_1 var_32_arg_0 = var_28; [L97] SORT_1 var_32 = ~var_32_arg_0; [L98] SORT_1 var_33_arg_0 = var_31; [L99] SORT_1 var_33_arg_1 = var_32; [L100] SORT_1 var_33 = var_33_arg_0 & var_33_arg_1; [L101] var_33 = var_33 & mask_SORT_1 [L102] SORT_1 bad_34_arg_0 = var_33; [L103] CALL __VERIFIER_assert(!(bad_34_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 01:39:48,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal57.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 9be67a2dd8530a66f1036afdfdb19835d7e01c5ffc65f4ebaab799190bdae8fe --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:39:51,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:39:51,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:39:51,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:39:51,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:39:51,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:39:51,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:39:51,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:39:51,336 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:39:51,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:39:51,342 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:39:51,343 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:39:51,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:39:51,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:39:51,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:39:51,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:39:51,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:39:51,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:39:51,349 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:39:51,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:39:51,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:39:51,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:39:51,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:39:51,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:39:51,376 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:39:51,376 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:39:51,376 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:39:51,377 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:39:51,378 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:39:51,378 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:39:51,379 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:39:51,379 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:39:51,380 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:39:51,381 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:39:51,382 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:39:51,382 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:39:51,386 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:39:51,387 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:39:51,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:39:51,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:39:51,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:39:51,390 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 01:39:51,415 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:39:51,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:39:51,415 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:39:51,415 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:39:51,416 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:39:51,416 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:39:51,416 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:39:51,417 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:39:51,417 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:39:51,417 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:39:51,417 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:39:51,417 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:39:51,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:39:51,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:39:51,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:39:51,419 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:39:51,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:39:51,419 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 01:39:51,419 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 01:39:51,419 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 01:39:51,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:39:51,420 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:39:51,420 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:39:51,420 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:39:51,420 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 01:39:51,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:39:51,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:39:51,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:39:51,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:39:51,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:39:51,421 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 01:39:51,421 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 01:39:51,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:39:51,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:39:51,422 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 01:39:51,422 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9be67a2dd8530a66f1036afdfdb19835d7e01c5ffc65f4ebaab799190bdae8fe [2022-11-03 01:39:51,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:39:51,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:39:51,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:39:51,795 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:39:51,795 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:39:51,797 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal57.c [2022-11-03 01:39:51,865 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/data/71c6b36bf/a0407d7bb2e945eab321109a78445531/FLAG7fdf6ba87 [2022-11-03 01:39:52,453 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:39:52,454 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal57.c [2022-11-03 01:39:52,460 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/data/71c6b36bf/a0407d7bb2e945eab321109a78445531/FLAG7fdf6ba87 [2022-11-03 01:39:52,805 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/data/71c6b36bf/a0407d7bb2e945eab321109a78445531 [2022-11-03 01:39:52,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:39:52,808 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:39:52,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:39:52,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:39:52,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:39:52,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:39:52" (1/1) ... [2022-11-03 01:39:52,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61ccd4ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:52, skipping insertion in model container [2022-11-03 01:39:52,816 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:39:52" (1/1) ... [2022-11-03 01:39:52,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:39:52,872 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:39:52,999 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_680403e7-a4c4-4b16-bab0-375dee8e63c9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal57.c[1107,1120] [2022-11-03 01:39:53,084 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:39:53,095 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:39:53,104 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_680403e7-a4c4-4b16-bab0-375dee8e63c9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal57.c[1107,1120] [2022-11-03 01:39:53,137 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:39:53,149 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:39:53,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:53 WrapperNode [2022-11-03 01:39:53,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:39:53,150 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:39:53,151 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:39:53,151 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:39:53,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:53" (1/1) ... [2022-11-03 01:39:53,179 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:53" (1/1) ... [2022-11-03 01:39:53,208 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 214 [2022-11-03 01:39:53,212 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:39:53,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:39:53,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:39:53,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:39:53,219 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:53" (1/1) ... [2022-11-03 01:39:53,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:53" (1/1) ... [2022-11-03 01:39:53,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:53" (1/1) ... [2022-11-03 01:39:53,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:53" (1/1) ... [2022-11-03 01:39:53,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:53" (1/1) ... [2022-11-03 01:39:53,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:53" (1/1) ... [2022-11-03 01:39:53,235 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:53" (1/1) ... [2022-11-03 01:39:53,236 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:53" (1/1) ... [2022-11-03 01:39:53,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:39:53,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:39:53,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:39:53,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:39:53,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:53" (1/1) ... [2022-11-03 01:39:53,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:39:53,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:39:53,269 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:39:53,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:39:53,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:39:53,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:39:53,413 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:39:53,415 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:39:53,746 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:39:53,753 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:39:53,754 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:39:53,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:39:53 BoogieIcfgContainer [2022-11-03 01:39:53,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:39:53,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:39:53,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:39:53,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:39:53,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:39:52" (1/3) ... [2022-11-03 01:39:53,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a0c3e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:39:53, skipping insertion in model container [2022-11-03 01:39:53,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:53" (2/3) ... [2022-11-03 01:39:53,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a0c3e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:39:53, skipping insertion in model container [2022-11-03 01:39:53,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:39:53" (3/3) ... [2022-11-03 01:39:53,765 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.cal57.c [2022-11-03 01:39:53,783 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:39:53,783 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:39:53,853 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:39:53,870 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@23d3323, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:39:53,873 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:39:53,880 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 38 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:39:53,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 01:39:53,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:53,887 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:39:53,888 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:53,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:53,894 INFO L85 PathProgramCache]: Analyzing trace with hash -332259343, now seen corresponding path program 1 times [2022-11-03 01:39:53,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:39:53,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222036668] [2022-11-03 01:39:53,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:53,912 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:39:53,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:39:53,919 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:39:53,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 01:39:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:54,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:39:54,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:39:54,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:39:54,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:39:54,194 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:39:54,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222036668] [2022-11-03 01:39:54,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1222036668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:39:54,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:39:54,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:39:54,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447651753] [2022-11-03 01:39:54,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:39:54,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:39:54,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:39:54,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:39:54,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:39:54,240 INFO L87 Difference]: Start difference. First operand has 39 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 38 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:39:54,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:39:54,340 INFO L93 Difference]: Finished difference Result 137 states and 203 transitions. [2022-11-03 01:39:54,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:39:54,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2022-11-03 01:39:54,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:39:54,356 INFO L225 Difference]: With dead ends: 137 [2022-11-03 01:39:54,356 INFO L226 Difference]: Without dead ends: 100 [2022-11-03 01:39:54,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:39:54,364 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 134 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:39:54,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 179 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:39:54,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-03 01:39:54,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 37. [2022-11-03 01:39:54,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:39:54,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2022-11-03 01:39:54,412 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 9 [2022-11-03 01:39:54,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:39:54,412 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2022-11-03 01:39:54,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:39:54,413 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2022-11-03 01:39:54,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 01:39:54,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:54,414 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:39:54,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:39:54,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:39:54,625 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:54,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:54,626 INFO L85 PathProgramCache]: Analyzing trace with hash -275001041, now seen corresponding path program 1 times [2022-11-03 01:39:54,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:39:54,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078267448] [2022-11-03 01:39:54,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:54,627 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:39:54,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:39:54,629 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:39:54,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 01:39:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:54,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:39:54,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:39:54,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:39:54,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:39:54,787 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:39:54,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078267448] [2022-11-03 01:39:54,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078267448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:39:54,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:39:54,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:39:54,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648277915] [2022-11-03 01:39:54,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:39:54,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:39:54,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:39:54,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:39:54,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:39:54,791 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:39:54,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:39:54,828 INFO L93 Difference]: Finished difference Result 133 states and 187 transitions. [2022-11-03 01:39:54,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:39:54,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2022-11-03 01:39:54,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:39:54,830 INFO L225 Difference]: With dead ends: 133 [2022-11-03 01:39:54,830 INFO L226 Difference]: Without dead ends: 100 [2022-11-03 01:39:54,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:39:54,832 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 128 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:39:54,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 178 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:39:54,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-03 01:39:54,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 39. [2022-11-03 01:39:54,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:39:54,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2022-11-03 01:39:54,839 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 9 [2022-11-03 01:39:54,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:39:54,839 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2022-11-03 01:39:54,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:39:54,840 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2022-11-03 01:39:54,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 01:39:54,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:54,841 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:39:54,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:39:55,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:39:55,052 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:55,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:55,062 INFO L85 PathProgramCache]: Analyzing trace with hash -274941459, now seen corresponding path program 1 times [2022-11-03 01:39:55,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:39:55,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462876599] [2022-11-03 01:39:55,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:55,064 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:39:55,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:39:55,065 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:39:55,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 01:39:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:55,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 01:39:55,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:39:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:39:55,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:39:55,345 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:39:55,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462876599] [2022-11-03 01:39:55,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462876599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:39:55,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:39:55,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:39:55,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917493233] [2022-11-03 01:39:55,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:39:55,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:39:55,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:39:55,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:39:55,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:39:55,355 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:39:55,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:39:55,455 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2022-11-03 01:39:55,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:39:55,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2022-11-03 01:39:55,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:39:55,457 INFO L225 Difference]: With dead ends: 73 [2022-11-03 01:39:55,458 INFO L226 Difference]: Without dead ends: 71 [2022-11-03 01:39:55,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:39:55,459 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 124 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:39:55,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 180 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:39:55,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-03 01:39:55,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 41. [2022-11-03 01:39:55,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:39:55,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2022-11-03 01:39:55,465 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 9 [2022-11-03 01:39:55,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:39:55,466 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2022-11-03 01:39:55,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:39:55,466 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2022-11-03 01:39:55,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:39:55,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:55,468 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:39:55,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-03 01:39:55,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:39:55,679 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:55,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:55,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1250611463, now seen corresponding path program 1 times [2022-11-03 01:39:55,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:39:55,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216438201] [2022-11-03 01:39:55,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:55,681 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:39:55,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:39:55,683 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:39:55,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 01:39:55,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:55,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:39:55,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:39:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:39:55,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:39:55,855 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:39:55,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1216438201] [2022-11-03 01:39:55,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1216438201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:39:55,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:39:55,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:39:55,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042265868] [2022-11-03 01:39:55,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:39:55,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:39:55,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:39:55,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:39:55,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:39:55,862 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 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) [2022-11-03 01:39:55,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:39:55,887 INFO L93 Difference]: Finished difference Result 81 states and 112 transitions. [2022-11-03 01:39:55,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:39:55,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 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 [2022-11-03 01:39:55,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:39:55,889 INFO L225 Difference]: With dead ends: 81 [2022-11-03 01:39:55,889 INFO L226 Difference]: Without dead ends: 48 [2022-11-03 01:39:55,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:39:55,891 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 79 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:39:55,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 75 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:39:55,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-03 01:39:55,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-11-03 01:39:55,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:39:55,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions. [2022-11-03 01:39:55,897 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 40 [2022-11-03 01:39:55,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:39:55,897 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 54 transitions. [2022-11-03 01:39:55,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 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) [2022-11-03 01:39:55,898 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions. [2022-11-03 01:39:55,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:39:55,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:55,899 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:39:55,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:39:56,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:39:56,111 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:56,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:56,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1110062853, now seen corresponding path program 1 times [2022-11-03 01:39:56,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:39:56,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711655029] [2022-11-03 01:39:56,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:56,113 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:39:56,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:39:56,114 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:39:56,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 01:39:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:56,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:39:56,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:39:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:39:56,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:39:56,284 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:39:56,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711655029] [2022-11-03 01:39:56,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711655029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:39:56,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:39:56,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:39:56,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472838767] [2022-11-03 01:39:56,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:39:56,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:39:56,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:39:56,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:39:56,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:39:56,287 INFO L87 Difference]: Start difference. First operand 41 states and 54 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 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) [2022-11-03 01:39:56,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:39:56,309 INFO L93 Difference]: Finished difference Result 85 states and 115 transitions. [2022-11-03 01:39:56,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:39:56,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 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 [2022-11-03 01:39:56,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:39:56,310 INFO L225 Difference]: With dead ends: 85 [2022-11-03 01:39:56,310 INFO L226 Difference]: Without dead ends: 52 [2022-11-03 01:39:56,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:39:56,312 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 73 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:39:56,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 82 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:39:56,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-03 01:39:56,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2022-11-03 01:39:56,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.325) internal successors, (53), 40 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:39:56,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2022-11-03 01:39:56,317 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 40 [2022-11-03 01:39:56,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:39:56,318 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2022-11-03 01:39:56,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 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) [2022-11-03 01:39:56,318 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2022-11-03 01:39:56,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:39:56,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:56,319 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:39:56,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:39:56,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:39:56,531 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:56,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:56,532 INFO L85 PathProgramCache]: Analyzing trace with hash -687361027, now seen corresponding path program 1 times [2022-11-03 01:39:56,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:39:56,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670842515] [2022-11-03 01:39:56,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:56,533 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:39:56,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:39:56,539 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:39:56,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 01:39:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:56,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:39:56,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:39:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:39:56,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:39:56,775 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:39:56,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670842515] [2022-11-03 01:39:56,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670842515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:39:56,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:39:56,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:39:56,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036205648] [2022-11-03 01:39:56,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:39:56,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:39:56,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:39:56,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:39:56,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:39:56,779 INFO L87 Difference]: Start difference. First operand 41 states and 53 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) [2022-11-03 01:39:56,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:39:56,873 INFO L93 Difference]: Finished difference Result 120 states and 160 transitions. [2022-11-03 01:39:56,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:39:56,874 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 [2022-11-03 01:39:56,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:39:56,875 INFO L225 Difference]: With dead ends: 120 [2022-11-03 01:39:56,875 INFO L226 Difference]: Without dead ends: 87 [2022-11-03 01:39:56,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:39:56,876 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 108 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:39:56,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 182 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:39:56,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-03 01:39:56,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 55. [2022-11-03 01:39:56,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 54 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:39:56,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2022-11-03 01:39:56,884 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 40 [2022-11-03 01:39:56,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:39:56,884 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2022-11-03 01:39:56,885 INFO L496 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) [2022-11-03 01:39:56,885 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2022-11-03 01:39:56,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:39:56,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:56,886 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:39:56,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:39:57,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:39:57,099 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:57,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:57,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1001582715, now seen corresponding path program 1 times [2022-11-03 01:39:57,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:39:57,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1263213547] [2022-11-03 01:39:57,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:57,101 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:39:57,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:39:57,102 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:39:57,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 01:39:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:57,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:39:57,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:39:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:39:57,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:39:57,278 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:39:57,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1263213547] [2022-11-03 01:39:57,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1263213547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:39:57,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:39:57,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:39:57,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678546822] [2022-11-03 01:39:57,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:39:57,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:39:57,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:39:57,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:39:57,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:39:57,281 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 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) [2022-11-03 01:39:57,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:39:57,308 INFO L93 Difference]: Finished difference Result 95 states and 126 transitions. [2022-11-03 01:39:57,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:39:57,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 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 [2022-11-03 01:39:57,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:39:57,310 INFO L225 Difference]: With dead ends: 95 [2022-11-03 01:39:57,310 INFO L226 Difference]: Without dead ends: 62 [2022-11-03 01:39:57,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:39:57,312 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 61 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:39:57,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 103 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:39:57,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-03 01:39:57,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2022-11-03 01:39:57,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 54 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:39:57,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2022-11-03 01:39:57,318 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 40 [2022-11-03 01:39:57,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:39:57,318 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2022-11-03 01:39:57,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 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) [2022-11-03 01:39:57,319 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2022-11-03 01:39:57,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:39:57,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:57,320 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:39:57,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:39:57,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:39:57,532 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:57,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:57,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1702647293, now seen corresponding path program 1 times [2022-11-03 01:39:57,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:39:57,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967264612] [2022-11-03 01:39:57,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:57,534 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:39:57,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:39:57,534 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:39:57,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 01:39:57,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:57,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:39:57,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:39:57,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:39:57,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:39:57,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:39:57,983 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:39:57,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967264612] [2022-11-03 01:39:57,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967264612] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:39:57,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1380456834] [2022-11-03 01:39:57,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:57,985 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:39:57,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:39:57,991 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:39:58,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-03 01:39:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:58,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:39:58,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:39:58,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:39:58,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:39:58,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:39:58,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1380456834] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:39:58,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045603403] [2022-11-03 01:39:58,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:58,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:39:58,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:39:58,435 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:39:58,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:39:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:58,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:39:58,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:39:58,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:39:58,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:39:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:39:58,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045603403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:39:58,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:39:58,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-03 01:39:58,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104393678] [2022-11-03 01:39:58,742 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:39:58,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:39:58,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:39:58,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:39:58,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:39:58,744 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:39:59,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:39:59,113 INFO L93 Difference]: Finished difference Result 188 states and 247 transitions. [2022-11-03 01:39:59,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:39:59,113 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 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 [2022-11-03 01:39:59,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:39:59,114 INFO L225 Difference]: With dead ends: 188 [2022-11-03 01:39:59,114 INFO L226 Difference]: Without dead ends: 155 [2022-11-03 01:39:59,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:39:59,115 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 438 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:39:59,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 366 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:39:59,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-03 01:39:59,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 68. [2022-11-03 01:39:59,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2985074626865671) internal successors, (87), 67 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:39:59,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2022-11-03 01:39:59,124 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 40 [2022-11-03 01:39:59,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:39:59,124 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2022-11-03 01:39:59,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:39:59,125 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2022-11-03 01:39:59,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:39:59,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:59,126 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:39:59,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:39:59,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:39:59,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:39:59,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:39:59,737 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:59,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:59,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1759905595, now seen corresponding path program 1 times [2022-11-03 01:39:59,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:39:59,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739737309] [2022-11-03 01:39:59,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:59,739 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:39:59,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:39:59,740 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:39:59,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 01:39:59,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:59,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:39:59,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:39:59,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:39:59,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:00,113 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:40:00,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739737309] [2022-11-03 01:40:00,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739737309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:00,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2078959199] [2022-11-03 01:40:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:00,114 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:40:00,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:40:00,115 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:40:00,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-03 01:40:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:00,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:40:00,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:40:00,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:40:00,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2078959199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:00,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:40:00,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 12 [2022-11-03 01:40:00,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811244099] [2022-11-03 01:40:00,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:00,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:40:00,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:40:00,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:40:00,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:40:00,289 INFO L87 Difference]: Start difference. First operand 68 states and 87 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) [2022-11-03 01:40:00,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:00,358 INFO L93 Difference]: Finished difference Result 202 states and 264 transitions. [2022-11-03 01:40:00,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:40:00,358 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 [2022-11-03 01:40:00,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:00,359 INFO L225 Difference]: With dead ends: 202 [2022-11-03 01:40:00,360 INFO L226 Difference]: Without dead ends: 156 [2022-11-03 01:40:00,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-11-03 01:40:00,361 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 204 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:00,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 159 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:40:00,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-11-03 01:40:00,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 70. [2022-11-03 01:40:00,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.289855072463768) internal successors, (89), 69 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:00,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2022-11-03 01:40:00,368 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 40 [2022-11-03 01:40:00,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:00,369 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2022-11-03 01:40:00,369 INFO L496 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) [2022-11-03 01:40:00,369 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2022-11-03 01:40:00,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:40:00,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:00,370 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:00,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:00,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:00,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:40:00,773 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:00,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:00,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1759965177, now seen corresponding path program 1 times [2022-11-03 01:40:00,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:40:00,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801323871] [2022-11-03 01:40:00,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:00,774 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:40:00,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:40:00,775 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:40:00,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 01:40:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:00,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 01:40:00,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:01,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:40:01,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:40:02,585 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:40:02,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801323871] [2022-11-03 01:40:02,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801323871] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:02,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1401082447] [2022-11-03 01:40:02,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:02,586 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:40:02,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:40:02,587 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:40:02,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-03 01:40:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:02,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 01:40:02,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:03,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:03,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:03,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:40:03,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1401082447] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:03,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232551665] [2022-11-03 01:40:03,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:03,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:03,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:03,771 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:03,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 01:40:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:03,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 01:40:03,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:04,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:40:04,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:04,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:40:04,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232551665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:04,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:40:04,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 12, 8, 9, 9] total 20 [2022-11-03 01:40:04,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960627288] [2022-11-03 01:40:04,772 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:40:04,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 01:40:04,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:40:04,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 01:40:04,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:40:04,773 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:05,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:05,490 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2022-11-03 01:40:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:40:05,490 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 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 [2022-11-03 01:40:05,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:05,491 INFO L225 Difference]: With dead ends: 74 [2022-11-03 01:40:05,491 INFO L226 Difference]: Without dead ends: 72 [2022-11-03 01:40:05,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 215 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2022-11-03 01:40:05,492 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 274 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:05,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 247 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 87 Unchecked, 0.1s Time] [2022-11-03 01:40:05,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-03 01:40:05,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-11-03 01:40:05,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 71 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:05,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2022-11-03 01:40:05,499 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 40 [2022-11-03 01:40:05,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:05,500 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2022-11-03 01:40:05,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:05,500 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2022-11-03 01:40:05,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 01:40:05,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:05,501 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:05,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:05,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:05,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2022-11-03 01:40:06,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:40:06,103 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:06,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:06,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1845699059, now seen corresponding path program 1 times [2022-11-03 01:40:06,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:40:06,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133189001] [2022-11-03 01:40:06,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:06,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:40:06,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:40:06,105 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:40:06,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 01:40:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:06,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:40:06,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:06,409 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:06,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:06,530 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:40:06,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133189001] [2022-11-03 01:40:06,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133189001] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:06,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [193358727] [2022-11-03 01:40:06,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:06,531 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:40:06,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:40:06,532 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:40:06,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-03 01:40:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:06,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:40:06,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:40:06,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:40:06,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [193358727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:06,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:40:06,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 01:40:06,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582013368] [2022-11-03 01:40:06,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:06,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:40:06,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:40:06,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:40:06,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-03 01:40:06,778 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:06,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:06,864 INFO L93 Difference]: Finished difference Result 168 states and 211 transitions. [2022-11-03 01:40:06,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:40:06,864 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 01:40:06,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:06,865 INFO L225 Difference]: With dead ends: 168 [2022-11-03 01:40:06,865 INFO L226 Difference]: Without dead ends: 118 [2022-11-03 01:40:06,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:40:06,867 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 163 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:06,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 191 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:40:06,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-03 01:40:06,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 72. [2022-11-03 01:40:06,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 71 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:06,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2022-11-03 01:40:06,873 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 71 [2022-11-03 01:40:06,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:06,873 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2022-11-03 01:40:06,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:06,874 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2022-11-03 01:40:06,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 01:40:06,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:06,875 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:06,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:07,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:07,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:40:07,277 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:07,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:07,278 INFO L85 PathProgramCache]: Analyzing trace with hash 40260725, now seen corresponding path program 1 times [2022-11-03 01:40:07,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:40:07,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021655939] [2022-11-03 01:40:07,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:07,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:40:07,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:40:07,279 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:40:07,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 01:40:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:07,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:40:07,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:07,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:07,782 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:40:07,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021655939] [2022-11-03 01:40:07,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021655939] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:07,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [505460231] [2022-11-03 01:40:07,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:07,783 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:40:07,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:40:07,787 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:40:07,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-03 01:40:07,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:07,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:40:07,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:40:08,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:40:08,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [505460231] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:08,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:40:08,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 11 [2022-11-03 01:40:08,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325838571] [2022-11-03 01:40:08,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:08,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:40:08,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:40:08,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:40:08,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:40:08,025 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:08,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:08,111 INFO L93 Difference]: Finished difference Result 200 states and 252 transitions. [2022-11-03 01:40:08,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:40:08,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 01:40:08,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:08,113 INFO L225 Difference]: With dead ends: 200 [2022-11-03 01:40:08,113 INFO L226 Difference]: Without dead ends: 146 [2022-11-03 01:40:08,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:40:08,116 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 90 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:08,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 273 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:40:08,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-03 01:40:08,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 86. [2022-11-03 01:40:08,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.2588235294117647) internal successors, (107), 85 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:08,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2022-11-03 01:40:08,140 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 71 [2022-11-03 01:40:08,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:08,140 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2022-11-03 01:40:08,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:08,141 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2022-11-03 01:40:08,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 01:40:08,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:08,144 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:08,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:08,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:08,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:40:08,561 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:08,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:08,562 INFO L85 PathProgramCache]: Analyzing trace with hash 720319095, now seen corresponding path program 1 times [2022-11-03 01:40:08,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:40:08,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069235819] [2022-11-03 01:40:08,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:08,562 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:40:08,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:40:08,563 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:40:08,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 01:40:08,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:08,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 01:40:08,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:40:09,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:15,075 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:40:15,076 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:40:15,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069235819] [2022-11-03 01:40:15,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069235819] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:15,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [550451855] [2022-11-03 01:40:15,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:15,076 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:40:15,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:40:15,078 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:40:15,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-03 01:40:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:15,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 01:40:15,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:40:15,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:40:16,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [550451855] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:16,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225515383] [2022-11-03 01:40:16,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:16,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:16,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:16,795 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:16,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-03 01:40:16,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:16,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-03 01:40:16,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:20,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:28,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225515383] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:28,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:40:28,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 26, 30, 30] total 101 [2022-11-03 01:40:28,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042848894] [2022-11-03 01:40:28,528 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:40:28,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-03 01:40:28,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:40:28,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-03 01:40:28,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=9272, Unknown=0, NotChecked=0, Total=10100 [2022-11-03 01:40:28,533 INFO L87 Difference]: Start difference. First operand 86 states and 107 transitions. Second operand has 101 states, 101 states have (on average 2.3366336633663365) internal successors, (236), 101 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:02,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:02,405 INFO L93 Difference]: Finished difference Result 1331 states and 1643 transitions. [2022-11-03 01:41:02,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 213 states. [2022-11-03 01:41:02,406 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.3366336633663365) internal successors, (236), 101 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 01:41:02,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:02,411 INFO L225 Difference]: With dead ends: 1331 [2022-11-03 01:41:02,411 INFO L226 Difference]: Without dead ends: 1263 [2022-11-03 01:41:02,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 353 SyntacticMatches, 3 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28201 ImplicationChecksByTransitivity, 44.2s TimeCoverageRelationStatistics Valid=12146, Invalid=83644, Unknown=0, NotChecked=0, Total=95790 [2022-11-03 01:41:02,435 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 3444 mSDsluCounter, 9882 mSDsCounter, 0 mSdLazyCounter, 4171 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3444 SdHoareTripleChecker+Valid, 10113 SdHoareTripleChecker+Invalid, 16800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 4171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12386 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:02,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3444 Valid, 10113 Invalid, 16800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 4171 Invalid, 0 Unknown, 12386 Unchecked, 3.7s Time] [2022-11-03 01:41:02,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2022-11-03 01:41:02,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 107. [2022-11-03 01:41:02,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.2735849056603774) internal successors, (135), 106 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:02,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 135 transitions. [2022-11-03 01:41:02,452 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 135 transitions. Word has length 71 [2022-11-03 01:41:02,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:02,453 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 135 transitions. [2022-11-03 01:41:02,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.3366336633663365) internal successors, (236), 101 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:02,453 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 135 transitions. [2022-11-03 01:41:02,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 01:41:02,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:02,455 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:02,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:02,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:02,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:03,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:41:03,058 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:03,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:03,059 INFO L85 PathProgramCache]: Analyzing trace with hash 720378677, now seen corresponding path program 1 times [2022-11-03 01:41:03,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:41:03,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434436653] [2022-11-03 01:41:03,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:03,059 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:41:03,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:41:03,061 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:41:03,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 01:41:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:03,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:41:03,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:03,451 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:41:03,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:41:03,678 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:41:03,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434436653] [2022-11-03 01:41:03,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434436653] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:03,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [96000147] [2022-11-03 01:41:03,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:03,679 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:41:03,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:41:03,683 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:41:03,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-03 01:41:03,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:03,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:41:03,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 01:41:03,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:03,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [96000147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:03,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:41:03,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 10] total 19 [2022-11-03 01:41:03,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895048582] [2022-11-03 01:41:03,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:03,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:41:03,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:41:03,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:41:03,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:41:03,889 INFO L87 Difference]: Start difference. First operand 107 states and 135 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:03,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:03,977 INFO L93 Difference]: Finished difference Result 278 states and 354 transitions. [2022-11-03 01:41:03,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:41:03,977 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 01:41:03,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:03,978 INFO L225 Difference]: With dead ends: 278 [2022-11-03 01:41:03,979 INFO L226 Difference]: Without dead ends: 189 [2022-11-03 01:41:03,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:41:03,980 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 123 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:03,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 155 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:41:03,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-03 01:41:03,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 107. [2022-11-03 01:41:03,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.2547169811320755) internal successors, (133), 106 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:03,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 133 transitions. [2022-11-03 01:41:03,990 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 133 transitions. Word has length 71 [2022-11-03 01:41:03,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:03,990 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 133 transitions. [2022-11-03 01:41:03,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:03,991 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 133 transitions. [2022-11-03 01:41:03,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 01:41:03,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:03,992 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:04,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:04,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:04,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:41:04,404 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:04,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:04,405 INFO L85 PathProgramCache]: Analyzing trace with hash 133513081, now seen corresponding path program 1 times [2022-11-03 01:41:04,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:41:04,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256070822] [2022-11-03 01:41:04,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:04,405 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:41:04,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:41:04,407 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:41:04,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 01:41:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:04,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:41:04,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:04,696 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:41:04,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:04,750 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:41:04,750 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:41:04,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256070822] [2022-11-03 01:41:04,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256070822] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:04,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:04,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-11-03 01:41:04,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138659938] [2022-11-03 01:41:04,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:04,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:41:04,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:41:04,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:41:04,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:41:04,752 INFO L87 Difference]: Start difference. First operand 107 states and 133 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:04,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:04,819 INFO L93 Difference]: Finished difference Result 349 states and 436 transitions. [2022-11-03 01:41:04,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:41:04,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 01:41:04,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:04,821 INFO L225 Difference]: With dead ends: 349 [2022-11-03 01:41:04,821 INFO L226 Difference]: Without dead ends: 260 [2022-11-03 01:41:04,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:41:04,824 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 126 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:04,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 202 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:41:04,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-03 01:41:04,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 141. [2022-11-03 01:41:04,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.2428571428571429) internal successors, (174), 140 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:04,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 174 transitions. [2022-11-03 01:41:04,842 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 174 transitions. Word has length 71 [2022-11-03 01:41:04,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:04,842 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 174 transitions. [2022-11-03 01:41:04,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:04,843 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 174 transitions. [2022-11-03 01:41:04,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 01:41:04,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:04,844 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:04,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:05,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:41:05,057 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:05,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:05,057 INFO L85 PathProgramCache]: Analyzing trace with hash -559544583, now seen corresponding path program 1 times [2022-11-03 01:41:05,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:41:05,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [942537234] [2022-11-03 01:41:05,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:05,058 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:41:05,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:41:05,059 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:41:05,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 01:41:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:05,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:41:05,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:05,333 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:41:05,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:41:05,404 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:41:05,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [942537234] [2022-11-03 01:41:05,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [942537234] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:05,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:05,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-11-03 01:41:05,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041246706] [2022-11-03 01:41:05,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:05,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:41:05,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:41:05,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:41:05,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:41:05,406 INFO L87 Difference]: Start difference. First operand 141 states and 174 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:05,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:05,465 INFO L93 Difference]: Finished difference Result 464 states and 573 transitions. [2022-11-03 01:41:05,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:41:05,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 01:41:05,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:05,467 INFO L225 Difference]: With dead ends: 464 [2022-11-03 01:41:05,467 INFO L226 Difference]: Without dead ends: 345 [2022-11-03 01:41:05,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:41:05,468 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 138 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:05,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 190 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:41:05,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-11-03 01:41:05,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 187. [2022-11-03 01:41:05,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.2204301075268817) internal successors, (227), 186 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:05,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 227 transitions. [2022-11-03 01:41:05,480 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 227 transitions. Word has length 71 [2022-11-03 01:41:05,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:05,481 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 227 transitions. [2022-11-03 01:41:05,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:05,481 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 227 transitions. [2022-11-03 01:41:05,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 01:41:05,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:05,482 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:05,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:05,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:41:05,695 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:05,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:05,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1651420167, now seen corresponding path program 1 times [2022-11-03 01:41:05,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:41:05,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307040543] [2022-11-03 01:41:05,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:05,696 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:41:05,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:41:05,697 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:41:05,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 01:41:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:05,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:41:05,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:05,961 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:41:05,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:05,997 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:41:05,997 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:41:05,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307040543] [2022-11-03 01:41:05,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307040543] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:05,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:05,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-11-03 01:41:05,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205627805] [2022-11-03 01:41:05,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:05,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:41:05,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:41:05,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:41:05,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:41:05,999 INFO L87 Difference]: Start difference. First operand 187 states and 227 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:06,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:06,060 INFO L93 Difference]: Finished difference Result 481 states and 589 transitions. [2022-11-03 01:41:06,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:41:06,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 01:41:06,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:06,064 INFO L225 Difference]: With dead ends: 481 [2022-11-03 01:41:06,065 INFO L226 Difference]: Without dead ends: 326 [2022-11-03 01:41:06,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:41:06,067 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 81 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:06,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 237 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:41:06,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-11-03 01:41:06,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 187. [2022-11-03 01:41:06,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.2043010752688172) internal successors, (224), 186 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:06,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 224 transitions. [2022-11-03 01:41:06,082 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 224 transitions. Word has length 71 [2022-11-03 01:41:06,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:06,082 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 224 transitions. [2022-11-03 01:41:06,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:06,083 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 224 transitions. [2022-11-03 01:41:06,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 01:41:06,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:06,084 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:06,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:06,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:41:06,295 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:06,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:06,295 INFO L85 PathProgramCache]: Analyzing trace with hash 2056741115, now seen corresponding path program 1 times [2022-11-03 01:41:06,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:41:06,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [68052959] [2022-11-03 01:41:06,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:06,296 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:41:06,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:41:06,297 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:41:06,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 01:41:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:06,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 01:41:06,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:41:08,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:13,742 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:41:13,742 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:41:13,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [68052959] [2022-11-03 01:41:13,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [68052959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:13,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [403617845] [2022-11-03 01:41:13,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:13,743 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:41:13,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:41:13,747 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:41:13,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-03 01:41:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:13,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-03 01:41:13,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:15,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:41:16,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [403617845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:16,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607658370] [2022-11-03 01:41:16,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:16,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:16,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:16,603 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:16,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-03 01:41:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:16,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-03 01:41:16,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 35 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:41:17,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:41:19,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607658370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:19,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:41:19,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 31, 27, 28, 28] total 58 [2022-11-03 01:41:19,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830002280] [2022-11-03 01:41:19,205 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:41:19,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-03 01:41:19,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:41:19,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-03 01:41:19,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=3034, Unknown=0, NotChecked=0, Total=3306 [2022-11-03 01:41:19,207 INFO L87 Difference]: Start difference. First operand 187 states and 224 transitions. Second operand has 58 states, 58 states have (on average 2.810344827586207) internal successors, (163), 58 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:21,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:21,539 INFO L93 Difference]: Finished difference Result 408 states and 490 transitions. [2022-11-03 01:41:21,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-03 01:41:21,539 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.810344827586207) internal successors, (163), 58 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 01:41:21,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:21,540 INFO L225 Difference]: With dead ends: 408 [2022-11-03 01:41:21,541 INFO L226 Difference]: Without dead ends: 406 [2022-11-03 01:41:21,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 363 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=503, Invalid=5817, Unknown=0, NotChecked=0, Total=6320 [2022-11-03 01:41:21,542 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 117 mSDsluCounter, 1838 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1883 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 717 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:21,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 1883 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 103 Invalid, 0 Unknown, 717 Unchecked, 0.1s Time] [2022-11-03 01:41:21,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-11-03 01:41:21,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 358. [2022-11-03 01:41:21,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.218487394957983) internal successors, (435), 357 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:21,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 435 transitions. [2022-11-03 01:41:21,564 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 435 transitions. Word has length 71 [2022-11-03 01:41:21,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:21,565 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 435 transitions. [2022-11-03 01:41:21,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.810344827586207) internal successors, (163), 58 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:21,565 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 435 transitions. [2022-11-03 01:41:21,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 01:41:21,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:21,566 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:21,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:21,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:21,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:22,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:41:22,175 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:22,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:22,176 INFO L85 PathProgramCache]: Analyzing trace with hash 2106522489, now seen corresponding path program 1 times [2022-11-03 01:41:22,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:41:22,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [712895935] [2022-11-03 01:41:22,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:22,176 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:41:22,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:41:22,177 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:41:22,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 01:41:22,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:22,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:41:22,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:41:22,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:41:22,445 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:41:22,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [712895935] [2022-11-03 01:41:22,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [712895935] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:22,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:22,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-11-03 01:41:22,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255124980] [2022-11-03 01:41:22,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:22,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:41:22,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:41:22,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:41:22,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:41:22,451 INFO L87 Difference]: Start difference. First operand 358 states and 435 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:22,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:22,516 INFO L93 Difference]: Finished difference Result 958 states and 1166 transitions. [2022-11-03 01:41:22,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:41:22,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 01:41:22,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:22,519 INFO L225 Difference]: With dead ends: 958 [2022-11-03 01:41:22,519 INFO L226 Difference]: Without dead ends: 632 [2022-11-03 01:41:22,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:41:22,520 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 87 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:22,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 234 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:41:22,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-11-03 01:41:22,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 358. [2022-11-03 01:41:22,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.184873949579832) internal successors, (423), 357 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:22,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 423 transitions. [2022-11-03 01:41:22,544 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 423 transitions. Word has length 71 [2022-11-03 01:41:22,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:22,544 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 423 transitions. [2022-11-03 01:41:22,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:22,545 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 423 transitions. [2022-11-03 01:41:22,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 01:41:22,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:22,545 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:22,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:22,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:41:22,758 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:22,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:22,758 INFO L85 PathProgramCache]: Analyzing trace with hash 826658811, now seen corresponding path program 1 times [2022-11-03 01:41:22,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:41:22,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883211091] [2022-11-03 01:41:22,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:22,759 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:41:22,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:41:22,760 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:41:22,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 01:41:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:22,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-03 01:41:22,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:41:24,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:41:30,368 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:41:30,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883211091] [2022-11-03 01:41:30,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883211091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:30,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [754341679] [2022-11-03 01:41:30,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:30,368 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:41:30,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:41:30,369 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:41:30,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-03 01:41:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:30,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-03 01:41:30,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:31,617 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:31,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:41:32,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [754341679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:32,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878164065] [2022-11-03 01:41:32,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:32,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:32,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:32,666 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:32,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-03 01:41:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:32,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-03 01:41:32,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:41:33,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:41:34,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878164065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:34,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:41:34,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 34, 30, 31, 31] total 64 [2022-11-03 01:41:34,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716386664] [2022-11-03 01:41:34,615 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:41:34,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-03 01:41:34,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:41:34,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-03 01:41:34,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=3730, Unknown=0, NotChecked=0, Total=4032 [2022-11-03 01:41:34,617 INFO L87 Difference]: Start difference. First operand 358 states and 423 transitions. Second operand has 64 states, 64 states have (on average 2.359375) internal successors, (151), 64 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:42,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:42,744 INFO L93 Difference]: Finished difference Result 949 states and 1119 transitions. [2022-11-03 01:41:42,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-03 01:41:42,745 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.359375) internal successors, (151), 64 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 01:41:42,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:42,748 INFO L225 Difference]: With dead ends: 949 [2022-11-03 01:41:42,748 INFO L226 Difference]: Without dead ends: 947 [2022-11-03 01:41:42,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 356 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2539 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=1800, Invalid=12006, Unknown=0, NotChecked=0, Total=13806 [2022-11-03 01:41:42,750 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 565 mSDsluCounter, 2668 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 2750 SdHoareTripleChecker+Invalid, 2984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2348 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:42,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 2750 Invalid, 2984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 613 Invalid, 0 Unknown, 2348 Unchecked, 0.6s Time] [2022-11-03 01:41:42,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-11-03 01:41:42,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 398. [2022-11-03 01:41:42,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 1.198992443324937) internal successors, (476), 397 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:42,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 476 transitions. [2022-11-03 01:41:42,786 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 476 transitions. Word has length 71 [2022-11-03 01:41:42,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:42,787 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 476 transitions. [2022-11-03 01:41:42,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.359375) internal successors, (151), 64 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:42,787 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 476 transitions. [2022-11-03 01:41:42,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 01:41:42,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:42,788 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:42,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:42,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:43,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:43,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:43,391 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:43,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:43,392 INFO L85 PathProgramCache]: Analyzing trace with hash -761689091, now seen corresponding path program 1 times [2022-11-03 01:41:43,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:41:43,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410921307] [2022-11-03 01:41:43,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:43,392 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:41:43,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:41:43,393 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:41:43,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 01:41:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:43,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:41:43,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:43,627 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:41:43,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:41:43,672 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:41:43,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410921307] [2022-11-03 01:41:43,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1410921307] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:43,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:43,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-03 01:41:43,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586000581] [2022-11-03 01:41:43,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:43,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:41:43,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:41:43,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:41:43,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:41:43,674 INFO L87 Difference]: Start difference. First operand 398 states and 476 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:43,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:43,767 INFO L93 Difference]: Finished difference Result 1502 states and 1764 transitions. [2022-11-03 01:41:43,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:41:43,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 01:41:43,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:43,771 INFO L225 Difference]: With dead ends: 1502 [2022-11-03 01:41:43,771 INFO L226 Difference]: Without dead ends: 1136 [2022-11-03 01:41:43,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:41:43,773 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 188 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:43,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 180 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:41:43,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-11-03 01:41:43,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 554. [2022-11-03 01:41:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 1.1735985533453888) internal successors, (649), 553 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:43,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 649 transitions. [2022-11-03 01:41:43,803 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 649 transitions. Word has length 71 [2022-11-03 01:41:43,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:43,803 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 649 transitions. [2022-11-03 01:41:43,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:43,804 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 649 transitions. [2022-11-03 01:41:43,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 01:41:43,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:43,807 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:43,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:44,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:41:44,019 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:44,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:44,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1528258685, now seen corresponding path program 1 times [2022-11-03 01:41:44,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:41:44,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23589919] [2022-11-03 01:41:44,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:44,020 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:41:44,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:41:44,021 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:41:44,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 01:41:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:44,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:41:44,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:41:44,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:44,243 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:41:44,243 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:41:44,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23589919] [2022-11-03 01:41:44,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23589919] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:44,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:44,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-11-03 01:41:44,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550665866] [2022-11-03 01:41:44,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:44,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:41:44,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:41:44,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:41:44,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:44,245 INFO L87 Difference]: Start difference. First operand 554 states and 649 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:44,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:44,304 INFO L93 Difference]: Finished difference Result 1483 states and 1728 transitions. [2022-11-03 01:41:44,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:41:44,305 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 01:41:44,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:44,311 INFO L225 Difference]: With dead ends: 1483 [2022-11-03 01:41:44,311 INFO L226 Difference]: Without dead ends: 983 [2022-11-03 01:41:44,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:41:44,313 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 115 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:44,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 243 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:41:44,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2022-11-03 01:41:44,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 554. [2022-11-03 01:41:44,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 1.1301989150090417) internal successors, (625), 553 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:44,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 625 transitions. [2022-11-03 01:41:44,343 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 625 transitions. Word has length 71 [2022-11-03 01:41:44,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:44,343 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 625 transitions. [2022-11-03 01:41:44,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:44,343 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 625 transitions. [2022-11-03 01:41:44,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 01:41:44,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:44,344 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:44,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:44,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:41:44,557 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:44,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:44,557 INFO L85 PathProgramCache]: Analyzing trace with hash -60089217, now seen corresponding path program 1 times [2022-11-03 01:41:44,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:41:44,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975406164] [2022-11-03 01:41:44,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:44,558 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:41:44,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:41:44,559 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:41:44,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 01:41:44,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:44,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-03 01:41:44,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:41:47,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:41:54,785 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:41:54,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975406164] [2022-11-03 01:41:54,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975406164] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:54,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1551952774] [2022-11-03 01:41:54,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:54,786 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:41:54,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:41:54,791 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:41:54,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-03 01:41:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:55,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-03 01:41:55,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:56,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:57,835 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:41:57,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1551952774] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:57,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495811418] [2022-11-03 01:41:57,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:57,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:57,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:57,838 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:57,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-03 01:41:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:57,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-03 01:41:57,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:58,832 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 35 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:41:58,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:00,495 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:42:00,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495811418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:00,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:42:00,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 39, 35, 36, 36] total 74 [2022-11-03 01:42:00,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711022869] [2022-11-03 01:42:00,496 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:42:00,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-03 01:42:00,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:00,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-03 01:42:00,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=5050, Unknown=0, NotChecked=0, Total=5402 [2022-11-03 01:42:00,498 INFO L87 Difference]: Start difference. First operand 554 states and 625 transitions. Second operand has 74 states, 74 states have (on average 2.2027027027027026) internal successors, (163), 74 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:03,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:03,317 INFO L93 Difference]: Finished difference Result 923 states and 1039 transitions. [2022-11-03 01:42:03,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-03 01:42:03,318 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2027027027027026) internal successors, (163), 74 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 01:42:03,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:03,320 INFO L225 Difference]: With dead ends: 923 [2022-11-03 01:42:03,320 INFO L226 Difference]: Without dead ends: 921 [2022-11-03 01:42:03,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 345 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2254 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=535, Invalid=7837, Unknown=0, NotChecked=0, Total=8372 [2022-11-03 01:42:03,322 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 151 mSDsluCounter, 2273 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 2329 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1114 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:03,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 2329 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 1114 Unchecked, 0.1s Time] [2022-11-03 01:42:03,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2022-11-03 01:42:03,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 868. [2022-11-03 01:42:03,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 1.132641291810842) internal successors, (982), 867 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:03,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 982 transitions. [2022-11-03 01:42:03,367 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 982 transitions. Word has length 71 [2022-11-03 01:42:03,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:03,367 INFO L495 AbstractCegarLoop]: Abstraction has 868 states and 982 transitions. [2022-11-03 01:42:03,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2027027027027026) internal successors, (163), 74 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:03,368 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 982 transitions. [2022-11-03 01:42:03,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 01:42:03,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:03,370 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:03,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:03,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:03,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:03,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:42:03,982 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:03,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:03,982 INFO L85 PathProgramCache]: Analyzing trace with hash -272216387, now seen corresponding path program 2 times [2022-11-03 01:42:03,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:03,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889208380] [2022-11-03 01:42:03,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:42:03,983 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:03,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:03,984 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:03,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 01:42:04,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:42:04,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:42:04,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-03 01:42:04,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:05,741 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 80 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:42:05,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:19,007 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 72 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:42:19,008 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:19,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889208380] [2022-11-03 01:42:19,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889208380] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:19,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1306139015] [2022-11-03 01:42:19,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:42:19,008 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:42:19,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:42:19,009 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:42:19,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-03 01:42:19,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:42:19,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:42:19,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-03 01:42:19,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:19,940 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 80 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:42:19,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 72 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:42:21,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1306139015] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:21,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115135945] [2022-11-03 01:42:21,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:42:21,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:21,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:21,816 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:21,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-03 01:42:21,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:42:21,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:42:21,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-03 01:42:21,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 7 proven. 96 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:42:27,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:36,046 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 81 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:42:36,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115135945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:36,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:42:36,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 45, 37, 45, 40, 40] total 132 [2022-11-03 01:42:36,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477405574] [2022-11-03 01:42:36,047 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:42:36,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-11-03 01:42:36,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:36,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-11-03 01:42:36,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=954, Invalid=16338, Unknown=0, NotChecked=0, Total=17292 [2022-11-03 01:42:36,050 INFO L87 Difference]: Start difference. First operand 868 states and 982 transitions. Second operand has 132 states, 132 states have (on average 2.3257575757575757) internal successors, (307), 132 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:13,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:13,250 INFO L93 Difference]: Finished difference Result 2574 states and 2929 transitions. [2022-11-03 01:43:13,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2022-11-03 01:43:13,251 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.3257575757575757) internal successors, (307), 132 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-11-03 01:43:13,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:13,255 INFO L225 Difference]: With dead ends: 2574 [2022-11-03 01:43:13,256 INFO L226 Difference]: Without dead ends: 2572 [2022-11-03 01:43:13,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 844 GetRequests, 510 SyntacticMatches, 4 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32718 ImplicationChecksByTransitivity, 55.9s TimeCoverageRelationStatistics Valid=13444, Invalid=96448, Unknown=0, NotChecked=0, Total=109892 [2022-11-03 01:43:13,263 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 4256 mSDsluCounter, 8649 mSDsCounter, 0 mSdLazyCounter, 5270 mSolverCounterSat, 714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4256 SdHoareTripleChecker+Valid, 8789 SdHoareTripleChecker+Invalid, 17553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 714 IncrementalHoareTripleChecker+Valid, 5270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11569 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:13,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4256 Valid, 8789 Invalid, 17553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [714 Valid, 5270 Invalid, 0 Unknown, 11569 Unchecked, 4.3s Time] [2022-11-03 01:43:13,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2022-11-03 01:43:13,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 968. [2022-11-03 01:43:13,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 967 states have (on average 1.1437435367114788) internal successors, (1106), 967 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:13,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1106 transitions. [2022-11-03 01:43:13,326 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1106 transitions. Word has length 102 [2022-11-03 01:43:13,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:13,327 INFO L495 AbstractCegarLoop]: Abstraction has 968 states and 1106 transitions. [2022-11-03 01:43:13,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.3257575757575757) internal successors, (307), 132 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:13,327 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1106 transitions. [2022-11-03 01:43:13,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 01:43:13,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:13,329 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:13,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:13,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:13,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:13,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:13,943 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:13,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:13,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1905920577, now seen corresponding path program 2 times [2022-11-03 01:43:13,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:13,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103093791] [2022-11-03 01:43:13,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:43:13,944 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:13,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:13,945 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:13,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 01:43:14,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:43:14,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:43:14,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-03 01:43:14,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:16,032 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 78 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:43:16,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 72 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:43:34,739 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:34,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103093791] [2022-11-03 01:43:34,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103093791] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:34,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1815564410] [2022-11-03 01:43:34,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:43:34,739 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:43:34,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:43:34,740 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:43:34,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-03 01:43:35,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:43:35,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:43:35,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-03 01:43:35,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:35,715 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 78 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:43:35,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 72 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:43:37,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1815564410] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:37,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333942656] [2022-11-03 01:43:37,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:43:37,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:37,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:37,696 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:37,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-03 01:43:37,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:43:37,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:43:37,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-03 01:43:37,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:45,586 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 7 proven. 94 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:43:45,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 81 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:43:53,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333942656] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:53,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:43:53,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 53, 43, 53, 46, 46] total 150 [2022-11-03 01:43:53,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429313433] [2022-11-03 01:43:53,744 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:53,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-11-03 01:43:53,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:53,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-11-03 01:43:53,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1080, Invalid=21270, Unknown=0, NotChecked=0, Total=22350 [2022-11-03 01:43:53,746 INFO L87 Difference]: Start difference. First operand 968 states and 1106 transitions. Second operand has 150 states, 150 states have (on average 2.006666666666667) internal successors, (301), 150 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:33,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:33,940 INFO L93 Difference]: Finished difference Result 2905 states and 3265 transitions. [2022-11-03 01:44:33,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-11-03 01:44:33,941 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 2.006666666666667) internal successors, (301), 150 states have internal predecessors, (301), 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 102 [2022-11-03 01:44:33,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:33,945 INFO L225 Difference]: With dead ends: 2905 [2022-11-03 01:44:33,945 INFO L226 Difference]: Without dead ends: 2903 [2022-11-03 01:44:33,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 814 GetRequests, 470 SyntacticMatches, 30 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30692 ImplicationChecksByTransitivity, 66.0s TimeCoverageRelationStatistics Valid=11867, Invalid=87673, Unknown=0, NotChecked=0, Total=99540 [2022-11-03 01:44:33,949 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 2905 mSDsluCounter, 11741 mSDsCounter, 0 mSdLazyCounter, 6298 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2905 SdHoareTripleChecker+Valid, 11899 SdHoareTripleChecker+Invalid, 14683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 6298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8115 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:33,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2905 Valid, 11899 Invalid, 14683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 6298 Invalid, 0 Unknown, 8115 Unchecked, 4.6s Time] [2022-11-03 01:44:33,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2903 states. [2022-11-03 01:44:34,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2903 to 1020. [2022-11-03 01:44:34,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 1.1472031403336604) internal successors, (1169), 1019 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:34,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1169 transitions. [2022-11-03 01:44:34,023 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1169 transitions. Word has length 102 [2022-11-03 01:44:34,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:34,024 INFO L495 AbstractCegarLoop]: Abstraction has 1020 states and 1169 transitions. [2022-11-03 01:44:34,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 2.006666666666667) internal successors, (301), 150 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:34,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1169 transitions. [2022-11-03 01:44:34,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 01:44:34,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:34,027 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:34,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:34,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:34,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:34,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:44:34,640 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:34,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:34,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1721446597, now seen corresponding path program 3 times [2022-11-03 01:44:34,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:34,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266774534] [2022-11-03 01:44:34,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:44:34,641 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:34,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:34,643 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:34,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 01:44:34,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:44:34,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:34,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:44:34,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 70 proven. 22 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:44:35,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:35,279 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 70 proven. 22 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:44:35,279 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:44:35,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266774534] [2022-11-03 01:44:35,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [266774534] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:35,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1329315258] [2022-11-03 01:44:35,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:44:35,279 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:44:35,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:44:35,280 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:44:35,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-03 01:44:35,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:44:35,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:35,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:44:35,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:35,696 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 70 proven. 22 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:44:35,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 70 proven. 22 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:44:35,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1329315258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:35,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403546482] [2022-11-03 01:44:35,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:44:35,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:35,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:35,827 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:35,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-03 01:44:35,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:44:35,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:35,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:44:35,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:36,140 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 70 proven. 22 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:44:36,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:36,291 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 70 proven. 22 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:44:36,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403546482] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:36,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:44:36,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 18 [2022-11-03 01:44:36,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109579881] [2022-11-03 01:44:36,291 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:36,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 01:44:36,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:44:36,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 01:44:36,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:44:36,293 INFO L87 Difference]: Start difference. First operand 1020 states and 1169 transitions. Second operand has 18 states, 18 states have (on average 7.666666666666667) internal successors, (138), 18 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:36,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:36,730 INFO L93 Difference]: Finished difference Result 2387 states and 2715 transitions. [2022-11-03 01:44:36,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:44:36,730 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 7.666666666666667) internal successors, (138), 18 states have internal predecessors, (138), 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 102 [2022-11-03 01:44:36,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:36,733 INFO L225 Difference]: With dead ends: 2387 [2022-11-03 01:44:36,733 INFO L226 Difference]: Without dead ends: 1412 [2022-11-03 01:44:36,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 590 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2022-11-03 01:44:36,734 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 253 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:36,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 809 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:44:36,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2022-11-03 01:44:36,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1020. [2022-11-03 01:44:36,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 1.1373895976447497) internal successors, (1159), 1019 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:36,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1159 transitions. [2022-11-03 01:44:36,794 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1159 transitions. Word has length 102 [2022-11-03 01:44:36,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:36,795 INFO L495 AbstractCegarLoop]: Abstraction has 1020 states and 1159 transitions. [2022-11-03 01:44:36,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.666666666666667) internal successors, (138), 18 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:36,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1159 transitions. [2022-11-03 01:44:36,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 01:44:36,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:36,798 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:36,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:37,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:37,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:37,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:37,410 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:37,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:37,411 INFO L85 PathProgramCache]: Analyzing trace with hash -2092440441, now seen corresponding path program 4 times [2022-11-03 01:44:37,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:37,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449142961] [2022-11-03 01:44:37,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:44:37,411 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:37,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:37,414 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:37,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 01:44:37,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:44:37,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:37,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:44:37,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:37,694 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 74 proven. 20 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:44:37,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 74 proven. 20 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:44:37,801 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:44:37,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449142961] [2022-11-03 01:44:37,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449142961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:37,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1407950056] [2022-11-03 01:44:37,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:44:37,801 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:44:37,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:44:37,802 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:44:37,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-03 01:44:38,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:44:38,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:38,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:44:38,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 01:44:38,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:44:38,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1407950056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:38,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:44:38,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 11 [2022-11-03 01:44:38,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725106288] [2022-11-03 01:44:38,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:38,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:44:38,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:44:38,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:44:38,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:44:38,045 INFO L87 Difference]: Start difference. First operand 1020 states and 1159 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:38,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:38,134 INFO L93 Difference]: Finished difference Result 2050 states and 2343 transitions. [2022-11-03 01:44:38,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:44:38,134 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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 102 [2022-11-03 01:44:38,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:38,136 INFO L225 Difference]: With dead ends: 2050 [2022-11-03 01:44:38,136 INFO L226 Difference]: Without dead ends: 1084 [2022-11-03 01:44:38,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:44:38,137 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 95 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:38,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 206 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:44:38,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2022-11-03 01:44:38,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 936. [2022-11-03 01:44:38,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 1.1251336898395723) internal successors, (1052), 935 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:38,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1052 transitions. [2022-11-03 01:44:38,192 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1052 transitions. Word has length 102 [2022-11-03 01:44:38,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:38,193 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1052 transitions. [2022-11-03 01:44:38,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:38,193 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1052 transitions. [2022-11-03 01:44:38,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 01:44:38,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:38,195 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:38,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:38,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:38,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:44:38,608 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:38,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:38,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1887875143, now seen corresponding path program 3 times [2022-11-03 01:44:38,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:38,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111194397] [2022-11-03 01:44:38,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:44:38,609 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:38,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:38,610 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:38,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-03 01:44:38,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:44:38,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:38,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-03 01:44:38,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 8 proven. 70 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 01:44:43,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:54,010 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 01:44:54,011 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:44:54,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111194397] [2022-11-03 01:44:54,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111194397] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:54,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [360726742] [2022-11-03 01:44:54,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:44:54,011 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:44:54,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:44:54,012 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:44:54,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-03 01:44:54,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:44:54,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:54,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-03 01:44:54,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 8 proven. 70 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 01:44:57,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 01:45:01,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [360726742] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:01,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556756989] [2022-11-03 01:45:01,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:45:01,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:01,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:45:01,343 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:45:01,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-03 01:45:01,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:45:01,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:45:01,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-03 01:45:01,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 48 proven. 56 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:45:10,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:24,962 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 44 proven. 60 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:45:24,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556756989] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:24,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:45:24,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 28, 27, 32, 32] total 113 [2022-11-03 01:45:24,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927800500] [2022-11-03 01:45:24,963 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:45:24,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-11-03 01:45:24,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:45:24,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-11-03 01:45:24,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=12145, Unknown=0, NotChecked=0, Total=12656 [2022-11-03 01:45:24,965 INFO L87 Difference]: Start difference. First operand 936 states and 1052 transitions. Second operand has 113 states, 113 states have (on average 3.079646017699115) internal successors, (348), 113 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:45:38,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:38,722 INFO L93 Difference]: Finished difference Result 960 states and 1076 transitions. [2022-11-03 01:45:38,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-03 01:45:38,722 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 3.079646017699115) internal successors, (348), 113 states have internal predecessors, (348), 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 102 [2022-11-03 01:45:38,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:38,725 INFO L225 Difference]: With dead ends: 960 [2022-11-03 01:45:38,725 INFO L226 Difference]: Without dead ends: 958 [2022-11-03 01:45:38,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 492 SyntacticMatches, 7 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5845 ImplicationChecksByTransitivity, 44.5s TimeCoverageRelationStatistics Valid=1108, Invalid=21542, Unknown=0, NotChecked=0, Total=22650 [2022-11-03 01:45:38,728 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 104 mSDsluCounter, 2257 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 2299 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1166 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:38,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 2299 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 1166 Unchecked, 0.0s Time] [2022-11-03 01:45:38,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-11-03 01:45:38,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 428. [2022-11-03 01:45:38,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 1.1053864168618266) internal successors, (472), 427 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:45:38,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 472 transitions. [2022-11-03 01:45:38,751 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 472 transitions. Word has length 102 [2022-11-03 01:45:38,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:38,751 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 472 transitions. [2022-11-03 01:45:38,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 3.079646017699115) internal successors, (348), 113 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:45:38,751 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 472 transitions. [2022-11-03 01:45:38,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 01:45:38,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:38,753 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:38,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:38,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:39,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:39,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:45:39,375 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:39,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:39,376 INFO L85 PathProgramCache]: Analyzing trace with hash 290261821, now seen corresponding path program 1 times [2022-11-03 01:45:39,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:45:39,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311871492] [2022-11-03 01:45:39,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:39,377 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:45:39,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:45:39,378 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:45:39,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 01:45:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:39,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 124 conjunts are in the unsatisfiable core [2022-11-03 01:45:39,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 37 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:45:45,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:46:10,543 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 49 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:46:10,543 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:10,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311871492] [2022-11-03 01:46:10,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311871492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:46:10,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [450976072] [2022-11-03 01:46:10,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:10,544 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:46:10,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:46:10,545 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:46:10,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-03 01:46:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:10,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-03 01:46:10,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 29 proven. 63 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:46:15,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:46:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 68 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 01:46:22,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [450976072] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:46:22,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353898126] [2022-11-03 01:46:22,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:22,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:46:22,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:46:22,152 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:46:22,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-03 01:46:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:22,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-03 01:46:22,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 67 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 01:46:24,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:46:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 68 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 01:46:28,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353898126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:46:28,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:46:28,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 43, 38, 40, 39] total 132 [2022-11-03 01:46:28,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331167927] [2022-11-03 01:46:28,360 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:46:28,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-11-03 01:46:28,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:28,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-11-03 01:46:28,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1156, Invalid=16136, Unknown=0, NotChecked=0, Total=17292 [2022-11-03 01:46:28,363 INFO L87 Difference]: Start difference. First operand 428 states and 472 transitions. Second operand has 132 states, 132 states have (on average 2.4393939393939394) internal successors, (322), 132 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:47:00,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:00,581 INFO L93 Difference]: Finished difference Result 1453 states and 1592 transitions. [2022-11-03 01:47:00,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-11-03 01:47:00,582 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.4393939393939394) internal successors, (322), 132 states have internal predecessors, (322), 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 102 [2022-11-03 01:47:00,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:00,584 INFO L225 Difference]: With dead ends: 1453 [2022-11-03 01:47:00,584 INFO L226 Difference]: Without dead ends: 1451 [2022-11-03 01:47:00,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 479 SyntacticMatches, 18 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12667 ImplicationChecksByTransitivity, 67.7s TimeCoverageRelationStatistics Valid=2553, Invalid=38049, Unknown=0, NotChecked=0, Total=40602 [2022-11-03 01:47:00,587 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 731 mSDsluCounter, 5383 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 5456 SdHoareTripleChecker+Invalid, 4364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4262 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:00,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [731 Valid, 5456 Invalid, 4364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 4262 Unchecked, 0.1s Time] [2022-11-03 01:47:00,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2022-11-03 01:47:00,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 867. [2022-11-03 01:47:00,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 1.1073903002309469) internal successors, (959), 866 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:47:00,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 959 transitions. [2022-11-03 01:47:00,657 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 959 transitions. Word has length 102 [2022-11-03 01:47:00,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:00,658 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 959 transitions. [2022-11-03 01:47:00,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.4393939393939394) internal successors, (322), 132 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:47:00,658 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 959 transitions. [2022-11-03 01:47:00,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 01:47:00,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:00,661 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:47:00,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:00,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:01,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2022-11-03 01:47:01,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:47:01,287 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:01,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:01,288 INFO L85 PathProgramCache]: Analyzing trace with hash -258950083, now seen corresponding path program 5 times [2022-11-03 01:47:01,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:01,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255916701] [2022-11-03 01:47:01,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 01:47:01,289 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:01,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:01,291 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:01,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-03 01:47:01,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-03 01:47:01,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:47:01,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 152 conjunts are in the unsatisfiable core [2022-11-03 01:47:01,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 36 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:10,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 63 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:46,884 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:46,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255916701] [2022-11-03 01:47:46,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255916701] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:46,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1371988299] [2022-11-03 01:47:46,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 01:47:46,885 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:47:46,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:47:46,887 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:47:46,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-03 01:47:47,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-03 01:47:47,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:47:47,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 115 conjunts are in the unsatisfiable core [2022-11-03 01:47:47,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 37 proven. 67 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:48:03,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:17,547 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 72 proven. 20 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:48:17,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1371988299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:17,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092278229] [2022-11-03 01:48:17,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 01:48:17,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:17,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:17,550 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:48:17,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-03 01:48:17,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-03 01:48:17,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:48:17,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 105 conjunts are in the unsatisfiable core [2022-11-03 01:48:17,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 83 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:48:29,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:32,876 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 73 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 01:48:32,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092278229] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:32,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:48:32,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 61, 62, 46, 58, 46] total 210 [2022-11-03 01:48:32,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48599768] [2022-11-03 01:48:32,877 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:48:32,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 210 states [2022-11-03 01:48:32,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:48:32,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 210 interpolants. [2022-11-03 01:48:32,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2450, Invalid=41440, Unknown=0, NotChecked=0, Total=43890 [2022-11-03 01:48:32,881 INFO L87 Difference]: Start difference. First operand 867 states and 959 transitions. Second operand has 210 states, 210 states have (on average 1.8952380952380952) internal successors, (398), 210 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:43,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:43,925 INFO L93 Difference]: Finished difference Result 4066 states and 4453 transitions. [2022-11-03 01:51:43,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2022-11-03 01:51:43,926 INFO L78 Accepts]: Start accepts. Automaton has has 210 states, 210 states have (on average 1.8952380952380952) internal successors, (398), 210 states have internal predecessors, (398), 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 102 [2022-11-03 01:51:43,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:43,930 INFO L225 Difference]: With dead ends: 4066 [2022-11-03 01:51:43,930 INFO L226 Difference]: Without dead ends: 3253 [2022-11-03 01:51:43,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 867 GetRequests, 414 SyntacticMatches, 40 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63643 ImplicationChecksByTransitivity, 266.1s TimeCoverageRelationStatistics Valid=11174, Invalid=160636, Unknown=0, NotChecked=0, Total=171810 [2022-11-03 01:51:43,944 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 1759 mSDsluCounter, 14750 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1759 SdHoareTripleChecker+Valid, 14866 SdHoareTripleChecker+Invalid, 21689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20395 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:43,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1759 Valid, 14866 Invalid, 21689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1272 Invalid, 0 Unknown, 20395 Unchecked, 1.3s Time] [2022-11-03 01:51:43,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3253 states. [2022-11-03 01:51:44,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3253 to 2010. [2022-11-03 01:51:44,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 2009 states have (on average 1.1020408163265305) internal successors, (2214), 2009 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:44,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 2214 transitions. [2022-11-03 01:51:44,247 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 2214 transitions. Word has length 102 [2022-11-03 01:51:44,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:44,247 INFO L495 AbstractCegarLoop]: Abstraction has 2010 states and 2214 transitions. [2022-11-03 01:51:44,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 210 states, 210 states have (on average 1.8952380952380952) internal successors, (398), 210 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:44,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 2214 transitions. [2022-11-03 01:51:44,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 01:51:44,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:44,251 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:44,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:44,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:44,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:44,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:44,864 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:44,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:44,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1386271175, now seen corresponding path program 2 times [2022-11-03 01:51:44,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:44,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519338860] [2022-11-03 01:51:44,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:51:44,865 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:44,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:44,866 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:44,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-03 01:51:44,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:51:44,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:51:45,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 125 conjunts are in the unsatisfiable core [2022-11-03 01:51:45,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:50,919 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 37 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:51:50,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 49 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:52:17,579 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:17,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519338860] [2022-11-03 01:52:17,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519338860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:17,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2052233652] [2022-11-03 01:52:17,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:52:17,580 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:17,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:52:17,581 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:52:17,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-03 01:52:17,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:52:17,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:52:17,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-03 01:52:17,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:21,802 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 47 proven. 45 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:52:21,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:28,790 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 68 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 01:52:28,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2052233652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:28,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750100204] [2022-11-03 01:52:28,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:52:28,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:28,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:28,795 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:28,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-03 01:52:28,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:52:28,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:52:28,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-03 01:52:28,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 69 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 01:52:30,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:33,917 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 68 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 01:52:33,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750100204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:33,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:52:33,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 40, 38, 39, 38] total 129 [2022-11-03 01:52:33,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799801913] [2022-11-03 01:52:33,918 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:52:33,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-11-03 01:52:33,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:33,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-11-03 01:52:33,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=15456, Unknown=0, NotChecked=0, Total=16512 [2022-11-03 01:52:33,921 INFO L87 Difference]: Start difference. First operand 2010 states and 2214 transitions. Second operand has 129 states, 129 states have (on average 2.4573643410852712) internal successors, (317), 129 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:49,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:49,288 INFO L93 Difference]: Finished difference Result 6600 states and 7157 transitions. [2022-11-03 01:53:49,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-11-03 01:53:49,291 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.4573643410852712) internal successors, (317), 129 states have internal predecessors, (317), 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 102 [2022-11-03 01:53:49,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:49,316 INFO L225 Difference]: With dead ends: 6600 [2022-11-03 01:53:49,316 INFO L226 Difference]: Without dead ends: 6598 [2022-11-03 01:53:49,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 497 SyntacticMatches, 18 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19522 ImplicationChecksByTransitivity, 109.8s TimeCoverageRelationStatistics Valid=4993, Invalid=68719, Unknown=0, NotChecked=0, Total=73712 [2022-11-03 01:53:49,322 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 642 mSDsluCounter, 7367 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 7522 SdHoareTripleChecker+Invalid, 3985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3821 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:49,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [642 Valid, 7522 Invalid, 3985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 163 Invalid, 0 Unknown, 3821 Unchecked, 0.3s Time] [2022-11-03 01:53:49,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6598 states. [2022-11-03 01:53:49,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6598 to 3503. [2022-11-03 01:53:49,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 1.1079383209594518) internal successors, (3880), 3502 states have internal predecessors, (3880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:49,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 3880 transitions. [2022-11-03 01:53:49,796 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 3880 transitions. Word has length 102 [2022-11-03 01:53:49,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:49,797 INFO L495 AbstractCegarLoop]: Abstraction has 3503 states and 3880 transitions. [2022-11-03 01:53:49,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.4573643410852712) internal successors, (317), 129 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:49,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 3880 transitions. [2022-11-03 01:53:49,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 01:53:49,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:49,801 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:49,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:50,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:50,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:50,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:50,406 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:50,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:50,406 INFO L85 PathProgramCache]: Analyzing trace with hash -422900291, now seen corresponding path program 3 times [2022-11-03 01:53:50,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:50,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13379468] [2022-11-03 01:53:50,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:53:50,407 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:50,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:50,408 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:50,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680403e7-a4c4-4b16-bab0-375dee8e63c9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-03 01:53:50,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:53:50,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:53:50,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-03 01:53:50,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 8 proven. 70 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 01:53:57,651 INFO L328 TraceCheckSpWp]: Computing backward predicates...