./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/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_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/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_9821b861-d965-48e5-a176-bbb95f96f3f6/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 db6a50c55e14aa003fa82db2a85ee0cb97b7b3cb88217359b942c6ee4f388bdc --- 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 01:42:15,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:42:15,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:42:16,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:42:16,001 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:42:16,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:42:16,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:42:16,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:42:16,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:42:16,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:42:16,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:42:16,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:42:16,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:42:16,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:42:16,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:42:16,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:42:16,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:42:16,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:42:16,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:42:16,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:42:16,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:42:16,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:42:16,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:42:16,052 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:42:16,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:42:16,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:42:16,062 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:42:16,064 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:42:16,065 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:42:16,066 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:42:16,066 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:42:16,069 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:42:16,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:42:16,072 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:42:16,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:42:16,074 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:42:16,075 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:42:16,075 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:42:16,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:42:16,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:42:16,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:42:16,078 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 01:42:16,110 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:42:16,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:42:16,111 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:42:16,111 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:42:16,112 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:42:16,112 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:42:16,112 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:42:16,113 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:42:16,113 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:42:16,113 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:42:16,113 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:42:16,113 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:42:16,114 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:42:16,114 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:42:16,114 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:42:16,114 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:42:16,115 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:42:16,115 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:42:16,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:42:16,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:42:16,116 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:42:16,116 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:42:16,116 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:42:16,117 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:42:16,117 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:42:16,117 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:42:16,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:42:16,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:42:16,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:42:16,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:42:16,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:42:16,119 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:42:16,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:42:16,119 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:42:16,119 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:42:16,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:42:16,120 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:42:16,120 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:42:16,120 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_9821b861-d965-48e5-a176-bbb95f96f3f6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db6a50c55e14aa003fa82db2a85ee0cb97b7b3cb88217359b942c6ee4f388bdc [2022-11-03 01:42:16,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:42:16,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:42:16,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:42:16,419 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:42:16,420 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:42:16,422 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v1.c [2022-11-03 01:42:16,513 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/data/93033a50e/bae3c005052a4eb489873e4010afdec9/FLAGf2ff351ec [2022-11-03 01:42:16,974 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:42:16,975 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v1.c [2022-11-03 01:42:16,984 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/data/93033a50e/bae3c005052a4eb489873e4010afdec9/FLAGf2ff351ec [2022-11-03 01:42:17,358 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/data/93033a50e/bae3c005052a4eb489873e4010afdec9 [2022-11-03 01:42:17,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:42:17,364 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:42:17,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:42:17,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:42:17,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:42:17,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:42:17" (1/1) ... [2022-11-03 01:42:17,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e355927 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:17, skipping insertion in model container [2022-11-03 01:42:17,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:42:17" (1/1) ... [2022-11-03 01:42:17,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:42:17,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:42:17,611 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_9821b861-d965-48e5-a176-bbb95f96f3f6/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v1.c[1107,1120] [2022-11-03 01:42:17,716 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:42:17,739 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:42:17,750 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_9821b861-d965-48e5-a176-bbb95f96f3f6/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v1.c[1107,1120] [2022-11-03 01:42:17,800 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:42:17,825 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:42:17,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:17 WrapperNode [2022-11-03 01:42:17,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:42:17,827 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:42:17,827 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:42:17,827 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:42:17,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:17" (1/1) ... [2022-11-03 01:42:17,847 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:17" (1/1) ... [2022-11-03 01:42:17,897 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 289 [2022-11-03 01:42:17,898 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:42:17,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:42:17,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:42:17,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:42:17,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:17" (1/1) ... [2022-11-03 01:42:17,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:17" (1/1) ... [2022-11-03 01:42:17,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:17" (1/1) ... [2022-11-03 01:42:17,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:17" (1/1) ... [2022-11-03 01:42:17,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:17" (1/1) ... [2022-11-03 01:42:17,932 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:17" (1/1) ... [2022-11-03 01:42:17,934 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:17" (1/1) ... [2022-11-03 01:42:17,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:17" (1/1) ... [2022-11-03 01:42:17,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:42:17,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:42:17,943 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:42:17,943 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:42:17,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:17" (1/1) ... [2022-11-03 01:42:17,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:42:17,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:18,014 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:42:18,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:42:18,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:42:18,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:42:18,232 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:42:18,234 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:42:18,638 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:42:18,981 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:42:18,982 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:42:18,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:42:18 BoogieIcfgContainer [2022-11-03 01:42:18,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:42:18,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:42:18,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:42:18,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:42:18,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:42:17" (1/3) ... [2022-11-03 01:42:18,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@279ef9d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:42:18, skipping insertion in model container [2022-11-03 01:42:18,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:17" (2/3) ... [2022-11-03 01:42:18,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@279ef9d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:42:18, skipping insertion in model container [2022-11-03 01:42:18,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:42:18" (3/3) ... [2022-11-03 01:42:18,997 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.eq_sdp_v1.c [2022-11-03 01:42:19,019 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:42:19,020 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:42:19,084 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:42:19,091 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;@24bf27c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:42:19,091 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:42:19,095 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 01:42:19,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 01:42:19,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:19,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 01:42:19,103 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:19,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:19,109 INFO L85 PathProgramCache]: Analyzing trace with hash 5134080, now seen corresponding path program 1 times [2022-11-03 01:42:19,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:19,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621076332] [2022-11-03 01:42:19,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:19,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:42:19,392 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 01:42:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:42:19,504 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 01:42:19,506 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 01:42:19,507 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 01:42:19,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:42:19,514 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 01:42:19,519 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 01:42:19,536 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 01:42:19,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 01:42:19 BoogieIcfgContainer [2022-11-03 01:42:19,543 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 01:42:19,544 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 01:42:19,544 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 01:42:19,544 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 01:42:19,545 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:42:18" (3/4) ... [2022-11-03 01:42:19,549 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 01:42:19,549 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 01:42:19,550 INFO L158 Benchmark]: Toolchain (without parser) took 2185.79ms. Allocated memory is still 107.0MB. Free memory was 68.7MB in the beginning and 52.4MB in the end (delta: 16.3MB). Peak memory consumption was 16.3MB. Max. memory is 16.1GB. [2022-11-03 01:42:19,551 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 107.0MB. Free memory is still 85.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:42:19,551 INFO L158 Benchmark]: CACSL2BoogieTranslator took 456.07ms. Allocated memory is still 107.0MB. Free memory was 68.5MB in the beginning and 78.7MB in the end (delta: -10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 01:42:19,552 INFO L158 Benchmark]: Boogie Procedure Inliner took 71.03ms. Allocated memory is still 107.0MB. Free memory was 78.7MB in the beginning and 74.9MB in the end (delta: 3.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 01:42:19,553 INFO L158 Benchmark]: Boogie Preprocessor took 43.33ms. Allocated memory is still 107.0MB. Free memory was 74.9MB in the beginning and 72.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 01:42:19,554 INFO L158 Benchmark]: RCFGBuilder took 1043.93ms. Allocated memory is still 107.0MB. Free memory was 72.4MB in the beginning and 77.0MB in the end (delta: -4.6MB). Peak memory consumption was 41.8MB. Max. memory is 16.1GB. [2022-11-03 01:42:19,554 INFO L158 Benchmark]: TraceAbstraction took 553.16ms. Allocated memory is still 107.0MB. Free memory was 76.4MB in the beginning and 52.7MB in the end (delta: 23.7MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2022-11-03 01:42:19,555 INFO L158 Benchmark]: Witness Printer took 5.23ms. Allocated memory is still 107.0MB. Free memory was 52.7MB in the beginning and 52.4MB in the end (delta: 252.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:42:19,558 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 107.0MB. Free memory is still 85.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 456.07ms. Allocated memory is still 107.0MB. Free memory was 68.5MB in the beginning and 78.7MB in the end (delta: -10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 71.03ms. Allocated memory is still 107.0MB. Free memory was 78.7MB in the beginning and 74.9MB in the end (delta: 3.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.33ms. Allocated memory is still 107.0MB. Free memory was 74.9MB in the beginning and 72.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1043.93ms. Allocated memory is still 107.0MB. Free memory was 72.4MB in the beginning and 77.0MB in the end (delta: -4.6MB). Peak memory consumption was 41.8MB. Max. memory is 16.1GB. * TraceAbstraction took 553.16ms. Allocated memory is still 107.0MB. Free memory was 76.4MB in the beginning and 52.7MB in the end (delta: 23.7MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Witness Printer took 5.23ms. Allocated memory is still 107.0MB. Free memory was 52.7MB in the beginning and 52.4MB in the end (delta: 252.1kB). 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 98, overapproximation of bitwiseAnd at line 87. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 8); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (8 - 1); [L28] const SORT_5 mask_SORT_5 = (SORT_5)-1 >> (sizeof(SORT_5) * 8 - 1); [L29] const SORT_5 msb_SORT_5 = (SORT_5)1 << (1 - 1); [L31] const SORT_1 var_10 = 0; [L32] const SORT_5 var_18 = 1; [L33] const SORT_5 var_28 = 0; [L35] SORT_1 input_2; [L36] SORT_1 input_3; [L37] SORT_1 input_4; [L38] SORT_5 input_6; [L39] SORT_5 input_7; [L40] SORT_5 input_8; [L41] SORT_5 input_9; [L43] SORT_1 state_11 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L44] SORT_1 state_13 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L45] SORT_1 state_22 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L46] SORT_1 state_24 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L47] SORT_1 state_26 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L48] SORT_5 state_29 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L49] SORT_5 state_31 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L50] SORT_1 state_33 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L51] SORT_5 state_35 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L52] SORT_1 state_37 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L53] SORT_1 state_40 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L54] SORT_1 state_42 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L56] SORT_1 init_12_arg_1 = var_10; [L57] state_11 = init_12_arg_1 [L58] SORT_1 init_14_arg_1 = var_10; [L59] state_13 = init_14_arg_1 [L60] SORT_1 init_23_arg_1 = var_10; [L61] state_22 = init_23_arg_1 [L62] SORT_1 init_25_arg_1 = var_10; [L63] state_24 = init_25_arg_1 [L64] SORT_1 init_27_arg_1 = var_10; [L65] state_26 = init_27_arg_1 [L66] SORT_5 init_30_arg_1 = var_28; [L67] state_29 = init_30_arg_1 [L68] SORT_5 init_32_arg_1 = var_28; [L69] state_31 = init_32_arg_1 [L70] SORT_1 init_34_arg_1 = var_10; [L71] state_33 = init_34_arg_1 [L72] SORT_5 init_36_arg_1 = var_28; [L73] state_35 = init_36_arg_1 [L74] SORT_1 init_38_arg_1 = var_10; [L75] state_37 = init_38_arg_1 [L76] SORT_1 init_41_arg_1 = var_10; [L77] state_40 = init_41_arg_1 [L78] SORT_1 init_43_arg_1 = var_10; [L79] state_42 = init_43_arg_1 VAL [init_12_arg_1=0, init_14_arg_1=0, init_23_arg_1=0, init_25_arg_1=0, init_27_arg_1=0, init_30_arg_1=0, init_32_arg_1=0, init_34_arg_1=0, init_36_arg_1=0, init_38_arg_1=0, init_41_arg_1=0, init_43_arg_1=0, mask_SORT_1=255, mask_SORT_5=1, msb_SORT_1=128, msb_SORT_5=1, state_11=0, state_13=0, state_22=0, state_24=0, state_26=0, state_29=0, state_31=0, state_33=0, state_35=0, state_37=0, state_40=0, state_42=0, var_10=0, var_18=1, var_28=0] [L82] input_2 = __VERIFIER_nondet_uchar() [L83] input_3 = __VERIFIER_nondet_uchar() [L84] input_4 = __VERIFIER_nondet_uchar() [L85] input_6 = __VERIFIER_nondet_uchar() [L86] input_7 = __VERIFIER_nondet_uchar() [L87] input_7 = input_7 & mask_SORT_5 [L88] input_8 = __VERIFIER_nondet_uchar() [L89] input_8 = input_8 & mask_SORT_5 [L90] input_9 = __VERIFIER_nondet_uchar() [L91] input_9 = input_9 & mask_SORT_5 [L94] SORT_1 var_15_arg_0 = state_11; [L95] SORT_1 var_15_arg_1 = state_13; [L96] SORT_5 var_15 = var_15_arg_0 == var_15_arg_1; [L97] SORT_5 var_19_arg_0 = var_15; [L98] SORT_5 var_19 = ~var_19_arg_0; [L99] SORT_5 var_20_arg_0 = var_18; [L100] SORT_5 var_20_arg_1 = var_19; [L101] SORT_5 var_20 = var_20_arg_0 & var_20_arg_1; [L102] var_20 = var_20 & mask_SORT_5 [L103] SORT_5 bad_21_arg_0 = var_20; [L104] CALL __VERIFIER_assert(!(bad_21_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: 0.4s, 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, 0.2s 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 01:42:19,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/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_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/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_9821b861-d965-48e5-a176-bbb95f96f3f6/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 db6a50c55e14aa003fa82db2a85ee0cb97b7b3cb88217359b942c6ee4f388bdc --- 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 01:42:22,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:42:22,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:42:22,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:42:22,088 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:42:22,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:42:22,094 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:42:22,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:42:22,104 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:42:22,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:42:22,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:42:22,115 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:42:22,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:42:22,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:42:22,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:42:22,121 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:42:22,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:42:22,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:42:22,126 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:42:22,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:42:22,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:42:22,138 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:42:22,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:42:22,143 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:42:22,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:42:22,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:42:22,152 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:42:22,154 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:42:22,154 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:42:22,155 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:42:22,156 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:42:22,156 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:42:22,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:42:22,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:42:22,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:42:22,160 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:42:22,161 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:42:22,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:42:22,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:42:22,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:42:22,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:42:22,165 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 01:42:22,206 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:42:22,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:42:22,208 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:42:22,208 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:42:22,209 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:42:22,209 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:42:22,209 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:42:22,209 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:42:22,209 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:42:22,210 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:42:22,211 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:42:22,211 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:42:22,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:42:22,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:42:22,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:42:22,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:42:22,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:42:22,213 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 01:42:22,214 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 01:42:22,214 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 01:42:22,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:42:22,214 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:42:22,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:42:22,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:42:22,215 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 01:42:22,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:42:22,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:42:22,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:42:22,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:42:22,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:42:22,216 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 01:42:22,216 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 01:42:22,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:42:22,217 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:42:22,217 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 01:42:22,217 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_9821b861-d965-48e5-a176-bbb95f96f3f6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db6a50c55e14aa003fa82db2a85ee0cb97b7b3cb88217359b942c6ee4f388bdc [2022-11-03 01:42:22,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:42:22,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:42:22,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:42:22,639 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:42:22,640 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:42:22,642 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v1.c [2022-11-03 01:42:22,720 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/data/a6cf5932d/69bca2347d764082b862f2567a879084/FLAG249891d19 [2022-11-03 01:42:23,233 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:42:23,235 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v1.c [2022-11-03 01:42:23,247 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/data/a6cf5932d/69bca2347d764082b862f2567a879084/FLAG249891d19 [2022-11-03 01:42:23,594 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/data/a6cf5932d/69bca2347d764082b862f2567a879084 [2022-11-03 01:42:23,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:42:23,599 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:42:23,603 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:42:23,603 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:42:23,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:42:23,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:42:23" (1/1) ... [2022-11-03 01:42:23,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bc320f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:23, skipping insertion in model container [2022-11-03 01:42:23,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:42:23" (1/1) ... [2022-11-03 01:42:23,620 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:42:23,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:42:23,798 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_9821b861-d965-48e5-a176-bbb95f96f3f6/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v1.c[1107,1120] [2022-11-03 01:42:23,864 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:42:23,868 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:42:23,922 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_9821b861-d965-48e5-a176-bbb95f96f3f6/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v1.c[1107,1120] [2022-11-03 01:42:23,997 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:42:24,010 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:42:24,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:24 WrapperNode [2022-11-03 01:42:24,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:42:24,012 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:42:24,012 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:42:24,012 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:42:24,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:24" (1/1) ... [2022-11-03 01:42:24,029 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:24" (1/1) ... [2022-11-03 01:42:24,075 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 289 [2022-11-03 01:42:24,075 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:42:24,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:42:24,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:42:24,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:42:24,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:24" (1/1) ... [2022-11-03 01:42:24,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:24" (1/1) ... [2022-11-03 01:42:24,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:24" (1/1) ... [2022-11-03 01:42:24,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:24" (1/1) ... [2022-11-03 01:42:24,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:24" (1/1) ... [2022-11-03 01:42:24,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:24" (1/1) ... [2022-11-03 01:42:24,105 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:24" (1/1) ... [2022-11-03 01:42:24,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:24" (1/1) ... [2022-11-03 01:42:24,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:42:24,127 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:42:24,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:42:24,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:42:24,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:24" (1/1) ... [2022-11-03 01:42:24,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:42:24,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:24,156 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:42:24,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:42:24,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:42:24,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:42:24,363 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:42:24,365 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:42:24,934 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:42:24,942 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:42:24,942 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:42:24,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:42:24 BoogieIcfgContainer [2022-11-03 01:42:24,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:42:24,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:42:24,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:42:24,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:42:24,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:42:23" (1/3) ... [2022-11-03 01:42:24,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33c5cbe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:42:24, skipping insertion in model container [2022-11-03 01:42:24,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:24" (2/3) ... [2022-11-03 01:42:24,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33c5cbe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:42:24, skipping insertion in model container [2022-11-03 01:42:24,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:42:24" (3/3) ... [2022-11-03 01:42:24,968 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.eq_sdp_v1.c [2022-11-03 01:42:24,988 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:42:24,988 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:42:25,057 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:42:25,065 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;@503891e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:42:25,065 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:42:25,070 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 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 01:42:25,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 01:42:25,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:25,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 01:42:25,078 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:25,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:25,083 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 01:42:25,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:25,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239273095] [2022-11-03 01:42:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:25,106 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:25,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:25,118 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:25,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 01:42:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:25,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:42:25,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:25,459 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 01:42:25,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:25,460 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:25,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239273095] [2022-11-03 01:42:25,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239273095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:25,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:25,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:42:25,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002763865] [2022-11-03 01:42:25,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:25,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:42:25,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:25,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:42:25,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:42:25,503 INFO L87 Difference]: Start difference. First operand has 43 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 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) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:25,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:25,574 INFO L93 Difference]: Finished difference Result 116 states and 174 transitions. [2022-11-03 01:42:25,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:42:25,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 01:42:25,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:25,589 INFO L225 Difference]: With dead ends: 116 [2022-11-03 01:42:25,589 INFO L226 Difference]: Without dead ends: 75 [2022-11-03 01:42:25,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:42:25,602 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 100 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:25,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 154 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:42:25,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-03 01:42:25,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 41. [2022-11-03 01:42:25,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.425) internal successors, (57), 40 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 01:42:25,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 57 transitions. [2022-11-03 01:42:25,650 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 57 transitions. Word has length 5 [2022-11-03 01:42:25,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:25,651 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 57 transitions. [2022-11-03 01:42:25,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:25,652 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 57 transitions. [2022-11-03 01:42:25,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:42:25,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:25,654 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:25,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:25,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:25,866 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:25,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:25,866 INFO L85 PathProgramCache]: Analyzing trace with hash 547600807, now seen corresponding path program 1 times [2022-11-03 01:42:25,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:25,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478159698] [2022-11-03 01:42:25,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:25,868 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:25,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:25,870 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:25,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 01:42:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:26,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:42:26,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:26,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:26,365 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:26,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478159698] [2022-11-03 01:42:26,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478159698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:26,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:26,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:42:26,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415871899] [2022-11-03 01:42:26,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:26,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:42:26,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:26,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:42:26,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:42:26,375 INFO L87 Difference]: Start difference. First operand 41 states and 57 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:26,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:26,564 INFO L93 Difference]: Finished difference Result 132 states and 188 transitions. [2022-11-03 01:42:26,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:42:26,565 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:26,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:26,568 INFO L225 Difference]: With dead ends: 132 [2022-11-03 01:42:26,568 INFO L226 Difference]: Without dead ends: 95 [2022-11-03 01:42:26,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:42:26,572 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 179 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:26,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 332 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-11-03 01:42:26,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-03 01:42:26,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 59. [2022-11-03 01:42:26,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.4310344827586208) internal successors, (83), 58 states have internal predecessors, (83), 0 states have call successors, (0), 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 01:42:26,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 83 transitions. [2022-11-03 01:42:26,597 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 83 transitions. Word has length 40 [2022-11-03 01:42:26,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:26,598 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 83 transitions. [2022-11-03 01:42:26,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:26,601 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 83 transitions. [2022-11-03 01:42:26,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:42:26,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:26,603 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:26,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:26,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:26,803 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:26,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:26,804 INFO L85 PathProgramCache]: Analyzing trace with hash -2058422747, now seen corresponding path program 1 times [2022-11-03 01:42:26,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:26,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896527581] [2022-11-03 01:42:26,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:26,805 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:26,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:26,808 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:26,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 01:42:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:26,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:42:26,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:27,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:27,026 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:27,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896527581] [2022-11-03 01:42:27,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896527581] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:27,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:27,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:42:27,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008375357] [2022-11-03 01:42:27,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:27,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:42:27,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:27,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:42:27,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:42:27,029 INFO L87 Difference]: Start difference. First operand 59 states and 83 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 01:42:27,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:27,063 INFO L93 Difference]: Finished difference Result 163 states and 233 transitions. [2022-11-03 01:42:27,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:42:27,064 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 01:42:27,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:27,065 INFO L225 Difference]: With dead ends: 163 [2022-11-03 01:42:27,065 INFO L226 Difference]: Without dead ends: 126 [2022-11-03 01:42:27,065 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 01:42:27,067 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 94 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:27,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 204 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:42:27,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-03 01:42:27,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 79. [2022-11-03 01:42:27,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.435897435897436) internal successors, (112), 78 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:27,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 112 transitions. [2022-11-03 01:42:27,078 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 112 transitions. Word has length 40 [2022-11-03 01:42:27,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:27,079 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 112 transitions. [2022-11-03 01:42:27,079 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 01:42:27,079 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 112 transitions. [2022-11-03 01:42:27,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:42:27,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:27,081 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:27,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:27,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:27,294 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:27,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:27,295 INFO L85 PathProgramCache]: Analyzing trace with hash 956680871, now seen corresponding path program 1 times [2022-11-03 01:42:27,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:27,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157688561] [2022-11-03 01:42:27,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:27,296 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:27,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:27,297 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:27,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 01:42:27,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:27,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 01:42:27,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:27,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:27,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:28,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:28,960 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:28,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157688561] [2022-11-03 01:42:28,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157688561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:28,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1199135701] [2022-11-03 01:42:28,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:28,962 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:42:28,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:42:28,966 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:42:28,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-03 01:42:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:29,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 01:42:29,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:29,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:29,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1199135701] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:29,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111050833] [2022-11-03 01:42:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:29,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:29,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:29,956 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:29,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:42:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:30,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 01:42:30,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:30,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:30,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111050833] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:30,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:42:30,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 12, 12] total 22 [2022-11-03 01:42:30,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922576894] [2022-11-03 01:42:30,904 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:42:30,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 01:42:30,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:30,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 01:42:30,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:42:30,906 INFO L87 Difference]: Start difference. First operand 79 states and 112 transitions. Second operand has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 22 states have internal predecessors, (82), 0 states have call successors, (0), 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 01:42:32,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:32,267 INFO L93 Difference]: Finished difference Result 241 states and 346 transitions. [2022-11-03 01:42:32,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 01:42:32,267 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 22 states have internal predecessors, (82), 0 states have call successors, (0), 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 01:42:32,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:32,269 INFO L225 Difference]: With dead ends: 241 [2022-11-03 01:42:32,269 INFO L226 Difference]: Without dead ends: 239 [2022-11-03 01:42:32,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 215 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=312, Invalid=1494, Unknown=0, NotChecked=0, Total=1806 [2022-11-03 01:42:32,271 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 416 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:32,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 864 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 107 Invalid, 0 Unknown, 196 Unchecked, 0.1s Time] [2022-11-03 01:42:32,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-03 01:42:32,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 130. [2022-11-03 01:42:32,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.434108527131783) internal successors, (185), 129 states have internal predecessors, (185), 0 states have call successors, (0), 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 01:42:32,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 185 transitions. [2022-11-03 01:42:32,284 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 185 transitions. Word has length 40 [2022-11-03 01:42:32,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:32,284 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 185 transitions. [2022-11-03 01:42:32,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 22 states have internal predecessors, (82), 0 states have call successors, (0), 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 01:42:32,285 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 185 transitions. [2022-11-03 01:42:32,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:42:32,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:32,286 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:32,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:32,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:32,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:32,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:32,907 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:32,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:32,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1658280745, now seen corresponding path program 1 times [2022-11-03 01:42:32,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:32,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1132209793] [2022-11-03 01:42:32,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:32,908 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:32,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:32,909 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:32,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 01:42:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:33,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:42:33,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:33,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:33,154 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:33,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1132209793] [2022-11-03 01:42:33,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1132209793] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:33,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:33,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:42:33,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989297500] [2022-11-03 01:42:33,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:33,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:42:33,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:33,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:42:33,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:42:33,157 INFO L87 Difference]: Start difference. First operand 130 states and 185 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:33,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:33,278 INFO L93 Difference]: Finished difference Result 192 states and 272 transitions. [2022-11-03 01:42:33,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:42:33,279 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:33,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:33,280 INFO L225 Difference]: With dead ends: 192 [2022-11-03 01:42:33,280 INFO L226 Difference]: Without dead ends: 139 [2022-11-03 01:42:33,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:42:33,281 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 136 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:33,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 327 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-11-03 01:42:33,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-03 01:42:33,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 118. [2022-11-03 01:42:33,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.4273504273504274) internal successors, (167), 117 states have internal predecessors, (167), 0 states have call successors, (0), 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 01:42:33,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 167 transitions. [2022-11-03 01:42:33,291 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 167 transitions. Word has length 40 [2022-11-03 01:42:33,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:33,292 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 167 transitions. [2022-11-03 01:42:33,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:33,292 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 167 transitions. [2022-11-03 01:42:33,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:42:33,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:33,294 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:33,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:33,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:33,518 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:33,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:33,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1576268373, now seen corresponding path program 1 times [2022-11-03 01:42:33,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:33,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47134737] [2022-11-03 01:42:33,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:33,534 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:33,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:33,536 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:33,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 01:42:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:33,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:42:33,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:33,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:33,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:33,823 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:33,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47134737] [2022-11-03 01:42:33,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47134737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:33,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:33,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:42:33,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720891504] [2022-11-03 01:42:33,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:33,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:42:33,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:33,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:42:33,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:42:33,826 INFO L87 Difference]: Start difference. First operand 118 states and 167 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:33,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:33,922 INFO L93 Difference]: Finished difference Result 219 states and 309 transitions. [2022-11-03 01:42:33,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:42:33,923 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:33,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:33,924 INFO L225 Difference]: With dead ends: 219 [2022-11-03 01:42:33,924 INFO L226 Difference]: Without dead ends: 166 [2022-11-03 01:42:33,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:42:33,925 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 136 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:33,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 379 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-11-03 01:42:33,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-03 01:42:33,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 118. [2022-11-03 01:42:33,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.4188034188034189) internal successors, (166), 117 states have internal predecessors, (166), 0 states have call successors, (0), 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 01:42:33,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 166 transitions. [2022-11-03 01:42:33,935 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 166 transitions. Word has length 40 [2022-11-03 01:42:33,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:33,935 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 166 transitions. [2022-11-03 01:42:33,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:33,936 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 166 transitions. [2022-11-03 01:42:33,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:42:33,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:33,937 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:33,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:34,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:34,149 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:34,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:34,150 INFO L85 PathProgramCache]: Analyzing trace with hash -874668499, now seen corresponding path program 1 times [2022-11-03 01:42:34,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:34,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490304056] [2022-11-03 01:42:34,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:34,151 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:34,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:34,152 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:34,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 01:42:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:34,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:42:34,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:34,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:34,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:34,394 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:34,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490304056] [2022-11-03 01:42:34,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490304056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:34,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:34,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:42:34,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688292545] [2022-11-03 01:42:34,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:34,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:42:34,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:34,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:42:34,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:42:34,399 INFO L87 Difference]: Start difference. First operand 118 states and 166 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:34,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:34,494 INFO L93 Difference]: Finished difference Result 257 states and 361 transitions. [2022-11-03 01:42:34,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:42:34,495 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:34,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:34,496 INFO L225 Difference]: With dead ends: 257 [2022-11-03 01:42:34,497 INFO L226 Difference]: Without dead ends: 206 [2022-11-03 01:42:34,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:42:34,498 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 89 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:34,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 475 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-11-03 01:42:34,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-03 01:42:34,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 118. [2022-11-03 01:42:34,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.4102564102564104) internal successors, (165), 117 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:34,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 165 transitions. [2022-11-03 01:42:34,506 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 165 transitions. Word has length 40 [2022-11-03 01:42:34,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:34,507 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 165 transitions. [2022-11-03 01:42:34,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:34,507 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 165 transitions. [2022-11-03 01:42:34,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:42:34,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:34,508 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:34,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:34,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:34,722 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:34,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:34,723 INFO L85 PathProgramCache]: Analyzing trace with hash 511534895, now seen corresponding path program 1 times [2022-11-03 01:42:34,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:34,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424211933] [2022-11-03 01:42:34,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:34,724 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:34,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:34,725 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:34,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 01:42:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:34,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:42:34,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:34,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:34,979 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:34,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424211933] [2022-11-03 01:42:34,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424211933] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:34,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:34,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:42:34,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114479827] [2022-11-03 01:42:34,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:34,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:42:34,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:34,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:42:34,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:42:34,981 INFO L87 Difference]: Start difference. First operand 118 states and 165 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:35,097 INFO L93 Difference]: Finished difference Result 249 states and 348 transitions. [2022-11-03 01:42:35,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:42:35,098 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:35,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:35,101 INFO L225 Difference]: With dead ends: 249 [2022-11-03 01:42:35,101 INFO L226 Difference]: Without dead ends: 200 [2022-11-03 01:42:35,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:42:35,103 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 86 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:35,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 572 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-03 01:42:35,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-03 01:42:35,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 118. [2022-11-03 01:42:35,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.4017094017094016) internal successors, (164), 117 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:35,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 164 transitions. [2022-11-03 01:42:35,117 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 164 transitions. Word has length 40 [2022-11-03 01:42:35,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:35,119 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 164 transitions. [2022-11-03 01:42:35,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:35,119 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 164 transitions. [2022-11-03 01:42:35,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:42:35,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:35,125 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:35,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:35,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:35,339 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:35,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:35,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1860204367, now seen corresponding path program 1 times [2022-11-03 01:42:35,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:35,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617111367] [2022-11-03 01:42:35,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:35,340 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:35,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:35,341 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:35,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 01:42:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:35,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:42:35,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:35,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:35,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:35,599 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:35,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617111367] [2022-11-03 01:42:35,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617111367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:35,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:35,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:42:35,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525514377] [2022-11-03 01:42:35,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:35,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:42:35,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:35,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:42:35,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:42:35,601 INFO L87 Difference]: Start difference. First operand 118 states and 164 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:35,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:35,690 INFO L93 Difference]: Finished difference Result 241 states and 335 transitions. [2022-11-03 01:42:35,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:42:35,691 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:35,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:35,692 INFO L225 Difference]: With dead ends: 241 [2022-11-03 01:42:35,692 INFO L226 Difference]: Without dead ends: 194 [2022-11-03 01:42:35,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:42:35,693 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 77 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:35,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 449 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-11-03 01:42:35,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-03 01:42:35,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 118. [2022-11-03 01:42:35,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.393162393162393) internal successors, (163), 117 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 01:42:35,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 163 transitions. [2022-11-03 01:42:35,699 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 163 transitions. Word has length 40 [2022-11-03 01:42:35,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:35,699 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 163 transitions. [2022-11-03 01:42:35,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:35,700 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 163 transitions. [2022-11-03 01:42:35,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:42:35,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:35,701 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:35,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:35,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:35,917 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:35,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:35,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1719655757, now seen corresponding path program 1 times [2022-11-03 01:42:35,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:35,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245169579] [2022-11-03 01:42:35,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:35,918 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:35,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:35,920 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:35,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 01:42:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:36,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:42:36,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:36,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:36,175 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:36,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245169579] [2022-11-03 01:42:36,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245169579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:36,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:36,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:42:36,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393573818] [2022-11-03 01:42:36,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:36,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:42:36,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:36,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:42:36,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:42:36,177 INFO L87 Difference]: Start difference. First operand 118 states and 163 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:36,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:36,273 INFO L93 Difference]: Finished difference Result 233 states and 322 transitions. [2022-11-03 01:42:36,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:42:36,274 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:36,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:36,275 INFO L225 Difference]: With dead ends: 233 [2022-11-03 01:42:36,275 INFO L226 Difference]: Without dead ends: 188 [2022-11-03 01:42:36,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:42:36,276 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 71 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:36,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 644 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-03 01:42:36,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-03 01:42:36,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 118. [2022-11-03 01:42:36,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.3846153846153846) internal successors, (162), 117 states have internal predecessors, (162), 0 states have call successors, (0), 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 01:42:36,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 162 transitions. [2022-11-03 01:42:36,281 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 162 transitions. Word has length 40 [2022-11-03 01:42:36,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:36,282 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 162 transitions. [2022-11-03 01:42:36,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:36,282 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 162 transitions. [2022-11-03 01:42:36,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:42:36,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:36,283 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:36,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:36,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:36,484 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:36,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:36,484 INFO L85 PathProgramCache]: Analyzing trace with hash 769873205, now seen corresponding path program 1 times [2022-11-03 01:42:36,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:36,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686012607] [2022-11-03 01:42:36,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:36,485 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:36,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:36,486 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:36,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 01:42:36,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:36,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:42:36,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:36,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:36,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:36,742 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:36,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686012607] [2022-11-03 01:42:36,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686012607] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:36,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:36,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:42:36,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735953430] [2022-11-03 01:42:36,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:36,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:42:36,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:36,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:42:36,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:42:36,744 INFO L87 Difference]: Start difference. First operand 118 states and 162 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:36,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:36,836 INFO L93 Difference]: Finished difference Result 225 states and 309 transitions. [2022-11-03 01:42:36,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:42:36,837 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:36,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:36,838 INFO L225 Difference]: With dead ends: 225 [2022-11-03 01:42:36,838 INFO L226 Difference]: Without dead ends: 182 [2022-11-03 01:42:36,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:42:36,839 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 65 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:36,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 624 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-11-03 01:42:36,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-03 01:42:36,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 118. [2022-11-03 01:42:36,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.376068376068376) internal successors, (161), 117 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 161 transitions. [2022-11-03 01:42:36,846 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 161 transitions. Word has length 40 [2022-11-03 01:42:36,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:36,846 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 161 transitions. [2022-11-03 01:42:36,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:36,846 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 161 transitions. [2022-11-03 01:42:36,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:42:36,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:36,847 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:36,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:37,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:37,060 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:37,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:37,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1192575031, now seen corresponding path program 1 times [2022-11-03 01:42:37,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:37,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087178780] [2022-11-03 01:42:37,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:37,061 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:37,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:37,062 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:37,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 01:42:37,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:37,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:42:37,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:37,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:37,320 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:37,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087178780] [2022-11-03 01:42:37,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087178780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:37,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:37,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:42:37,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895899808] [2022-11-03 01:42:37,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:37,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:42:37,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:37,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:42:37,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:42:37,321 INFO L87 Difference]: Start difference. First operand 118 states and 161 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:37,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:37,425 INFO L93 Difference]: Finished difference Result 209 states and 285 transitions. [2022-11-03 01:42:37,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:42:37,426 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:37,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:37,427 INFO L225 Difference]: With dead ends: 209 [2022-11-03 01:42:37,427 INFO L226 Difference]: Without dead ends: 170 [2022-11-03 01:42:37,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:42:37,428 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 56 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:37,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 496 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-03 01:42:37,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-03 01:42:37,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 118. [2022-11-03 01:42:37,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.3675213675213675) internal successors, (160), 117 states have internal predecessors, (160), 0 states have call successors, (0), 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 01:42:37,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 160 transitions. [2022-11-03 01:42:37,436 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 160 transitions. Word has length 40 [2022-11-03 01:42:37,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:37,437 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 160 transitions. [2022-11-03 01:42:37,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:37,437 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 160 transitions. [2022-11-03 01:42:37,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:42:37,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:37,438 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:37,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:37,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:37,650 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:37,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:37,651 INFO L85 PathProgramCache]: Analyzing trace with hash -395772871, now seen corresponding path program 1 times [2022-11-03 01:42:37,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:37,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [948209130] [2022-11-03 01:42:37,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:37,651 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:37,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:37,652 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:37,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 01:42:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:37,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:42:37,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:37,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:37,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:37,936 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:37,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [948209130] [2022-11-03 01:42:37,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [948209130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:37,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:37,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:42:37,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018163941] [2022-11-03 01:42:37,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:37,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:42:37,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:37,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:42:37,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:42:37,937 INFO L87 Difference]: Start difference. First operand 118 states and 160 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:38,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:38,022 INFO L93 Difference]: Finished difference Result 183 states and 250 transitions. [2022-11-03 01:42:38,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:42:38,023 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:38,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:38,024 INFO L225 Difference]: With dead ends: 183 [2022-11-03 01:42:38,024 INFO L226 Difference]: Without dead ends: 146 [2022-11-03 01:42:38,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:42:38,025 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 45 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:38,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 401 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 52 Unchecked, 0.0s Time] [2022-11-03 01:42:38,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-03 01:42:38,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2022-11-03 01:42:38,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.361344537815126) internal successors, (162), 119 states have internal predecessors, (162), 0 states have call successors, (0), 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 01:42:38,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 162 transitions. [2022-11-03 01:42:38,032 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 162 transitions. Word has length 40 [2022-11-03 01:42:38,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:38,033 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 162 transitions. [2022-11-03 01:42:38,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 01:42:38,033 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 162 transitions. [2022-11-03 01:42:38,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:42:38,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:38,034 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:38,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:38,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:38,246 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:38,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:38,246 INFO L85 PathProgramCache]: Analyzing trace with hash -982578885, now seen corresponding path program 1 times [2022-11-03 01:42:38,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:38,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34144997] [2022-11-03 01:42:38,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:38,247 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:38,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:38,248 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:38,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 01:42:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:38,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:42:38,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:38,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:38,421 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:38,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34144997] [2022-11-03 01:42:38,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34144997] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:38,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:38,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:42:38,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111105048] [2022-11-03 01:42:38,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:38,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:42:38,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:38,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:42:38,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:42:38,424 INFO L87 Difference]: Start difference. First operand 120 states and 162 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 01:42:38,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:38,479 INFO L93 Difference]: Finished difference Result 290 states and 406 transitions. [2022-11-03 01:42:38,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:42:38,479 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 01:42:38,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:38,481 INFO L225 Difference]: With dead ends: 290 [2022-11-03 01:42:38,481 INFO L226 Difference]: Without dead ends: 253 [2022-11-03 01:42:38,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 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 01:42:38,482 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 131 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:38,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 369 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:42:38,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-03 01:42:38,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 148. [2022-11-03 01:42:38,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.380952380952381) internal successors, (203), 147 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:38,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 203 transitions. [2022-11-03 01:42:38,489 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 203 transitions. Word has length 40 [2022-11-03 01:42:38,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:38,491 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 203 transitions. [2022-11-03 01:42:38,491 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 01:42:38,491 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 203 transitions. [2022-11-03 01:42:38,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:42:38,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:38,492 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:38,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:38,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:38,712 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:38,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:38,712 INFO L85 PathProgramCache]: Analyzing trace with hash 792428477, now seen corresponding path program 1 times [2022-11-03 01:42:38,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:38,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998261400] [2022-11-03 01:42:38,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:38,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:38,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:38,713 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:38,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 01:42:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:38,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:42:38,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:38,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:38,878 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:38,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998261400] [2022-11-03 01:42:38,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998261400] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:38,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:38,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:42:38,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734833245] [2022-11-03 01:42:38,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:38,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:42:38,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:38,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:42:38,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:42:38,880 INFO L87 Difference]: Start difference. First operand 148 states and 203 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 01:42:38,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:38,957 INFO L93 Difference]: Finished difference Result 320 states and 448 transitions. [2022-11-03 01:42:38,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:42:38,958 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 01:42:38,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:38,959 INFO L225 Difference]: With dead ends: 320 [2022-11-03 01:42:38,959 INFO L226 Difference]: Without dead ends: 255 [2022-11-03 01:42:38,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 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 01:42:38,961 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 128 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:38,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 370 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:42:38,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-03 01:42:38,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 150. [2022-11-03 01:42:38,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.3758389261744965) internal successors, (205), 149 states have internal predecessors, (205), 0 states have call successors, (0), 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 01:42:38,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 205 transitions. [2022-11-03 01:42:38,967 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 205 transitions. Word has length 40 [2022-11-03 01:42:38,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:38,968 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 205 transitions. [2022-11-03 01:42:38,968 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 01:42:38,968 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 205 transitions. [2022-11-03 01:42:38,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:42:38,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:38,969 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:38,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:39,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:39,183 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:39,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:39,184 INFO L85 PathProgramCache]: Analyzing trace with hash 794275519, now seen corresponding path program 1 times [2022-11-03 01:42:39,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:39,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006628072] [2022-11-03 01:42:39,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:39,184 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:39,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:39,185 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:39,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 01:42:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:39,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 01:42:39,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:39,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:40,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:40,695 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:40,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006628072] [2022-11-03 01:42:40,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006628072] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:40,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1723742824] [2022-11-03 01:42:40,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:40,696 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:42:40,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:42:40,697 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:42:40,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-03 01:42:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:40,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 01:42:40,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:41,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:41,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:41,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:41,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1723742824] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:41,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491520912] [2022-11-03 01:42:41,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:41,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:41,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:41,544 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:41,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 01:42:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:41,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 01:42:41,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:41,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:42,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:42,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491520912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:42,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:42:42,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 13, 13] total 24 [2022-11-03 01:42:42,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608906018] [2022-11-03 01:42:42,447 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:42:42,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 01:42:42,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:42,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 01:42:42,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:42:42,449 INFO L87 Difference]: Start difference. First operand 150 states and 205 transitions. Second operand has 24 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 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 01:42:43,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:43,238 INFO L93 Difference]: Finished difference Result 268 states and 362 transitions. [2022-11-03 01:42:43,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:42:43,239 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 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 01:42:43,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:43,240 INFO L225 Difference]: With dead ends: 268 [2022-11-03 01:42:43,240 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 01:42:43,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 210 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=229, Invalid=961, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 01:42:43,242 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 454 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:43,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 1579 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 173 Invalid, 0 Unknown, 209 Unchecked, 0.2s Time] [2022-11-03 01:42:43,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 01:42:43,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 181. [2022-11-03 01:42:43,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.3277777777777777) internal successors, (239), 180 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:43,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 239 transitions. [2022-11-03 01:42:43,249 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 239 transitions. Word has length 40 [2022-11-03 01:42:43,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:43,249 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 239 transitions. [2022-11-03 01:42:43,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 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 01:42:43,250 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 239 transitions. [2022-11-03 01:42:43,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:42:43,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:43,251 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:43,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:43,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:43,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:43,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:43,863 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:43,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:43,864 INFO L85 PathProgramCache]: Analyzing trace with hash 866662077, now seen corresponding path program 1 times [2022-11-03 01:42:43,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:43,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714167264] [2022-11-03 01:42:43,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:43,865 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:43,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:43,866 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:43,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 01:42:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:43,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:42:43,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:44,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:44,002 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:44,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714167264] [2022-11-03 01:42:44,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714167264] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:44,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:44,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:42:44,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361264241] [2022-11-03 01:42:44,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:44,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:42:44,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:44,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:42:44,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:42:44,004 INFO L87 Difference]: Start difference. First operand 181 states and 239 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 01:42:44,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:44,031 INFO L93 Difference]: Finished difference Result 411 states and 567 transitions. [2022-11-03 01:42:44,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:42:44,032 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 01:42:44,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:44,033 INFO L225 Difference]: With dead ends: 411 [2022-11-03 01:42:44,033 INFO L226 Difference]: Without dead ends: 271 [2022-11-03 01:42:44,034 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 01:42:44,035 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 137 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:44,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 162 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:42:44,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-11-03 01:42:44,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 161. [2022-11-03 01:42:44,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.35) internal successors, (216), 160 states have internal predecessors, (216), 0 states have call successors, (0), 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 01:42:44,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 216 transitions. [2022-11-03 01:42:44,042 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 216 transitions. Word has length 40 [2022-11-03 01:42:44,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:44,043 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 216 transitions. [2022-11-03 01:42:44,043 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 01:42:44,043 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 216 transitions. [2022-11-03 01:42:44,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:42:44,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:44,044 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:44,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:44,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:44,256 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:44,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:44,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2014133429, now seen corresponding path program 1 times [2022-11-03 01:42:44,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:44,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253332496] [2022-11-03 01:42:44,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:44,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:44,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:44,258 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:44,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 01:42:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:44,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:42:44,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 31 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:42:44,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:42:44,719 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:44,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1253332496] [2022-11-03 01:42:44,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1253332496] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:44,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:42:44,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-03 01:42:44,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082319780] [2022-11-03 01:42:44,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:44,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:42:44,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:44,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:42:44,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:42:44,724 INFO L87 Difference]: Start difference. First operand 161 states and 216 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 01:42:44,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:44,899 INFO L93 Difference]: Finished difference Result 276 states and 375 transitions. [2022-11-03 01:42:44,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:42:44,900 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 75 [2022-11-03 01:42:44,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:44,901 INFO L225 Difference]: With dead ends: 276 [2022-11-03 01:42:44,901 INFO L226 Difference]: Without dead ends: 209 [2022-11-03 01:42:44,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:42:44,902 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 291 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:44,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 241 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:42:44,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-11-03 01:42:44,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 161. [2022-11-03 01:42:44,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.3375) internal successors, (214), 160 states have internal predecessors, (214), 0 states have call successors, (0), 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 01:42:44,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 214 transitions. [2022-11-03 01:42:44,910 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 214 transitions. Word has length 75 [2022-11-03 01:42:44,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:44,911 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 214 transitions. [2022-11-03 01:42:44,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 01:42:44,911 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 214 transitions. [2022-11-03 01:42:44,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:42:44,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:44,912 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:44,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-11-03 01:42:45,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:45,118 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:45,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:45,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1782884401, now seen corresponding path program 1 times [2022-11-03 01:42:45,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:45,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791979322] [2022-11-03 01:42:45,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:45,119 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:45,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:45,120 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:45,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 01:42:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:45,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:42:45,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:45,524 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 31 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:42:45,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:45,566 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:42:45,567 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:45,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791979322] [2022-11-03 01:42:45,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791979322] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:45,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:42:45,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 01:42:45,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432103752] [2022-11-03 01:42:45,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:45,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:42:45,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:45,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:42:45,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:42:45,571 INFO L87 Difference]: Start difference. First operand 161 states and 214 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 01:42:45,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:45,712 INFO L93 Difference]: Finished difference Result 241 states and 325 transitions. [2022-11-03 01:42:45,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:42:45,713 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 75 [2022-11-03 01:42:45,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:45,714 INFO L225 Difference]: With dead ends: 241 [2022-11-03 01:42:45,714 INFO L226 Difference]: Without dead ends: 174 [2022-11-03 01:42:45,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-03 01:42:45,715 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 184 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:45,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 239 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:42:45,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-03 01:42:45,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 161. [2022-11-03 01:42:45,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.33125) internal successors, (213), 160 states have internal predecessors, (213), 0 states have call successors, (0), 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 01:42:45,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 213 transitions. [2022-11-03 01:42:45,723 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 213 transitions. Word has length 75 [2022-11-03 01:42:45,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:45,724 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 213 transitions. [2022-11-03 01:42:45,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 01:42:45,724 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 213 transitions. [2022-11-03 01:42:45,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:42:45,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:45,725 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:45,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:45,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:45,938 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:45,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:45,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1081284527, now seen corresponding path program 1 times [2022-11-03 01:42:45,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:45,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1553415381] [2022-11-03 01:42:45,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:45,939 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:45,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:45,939 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:45,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 01:42:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:46,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:42:46,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:46,339 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 29 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:42:46,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:42:46,383 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:46,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1553415381] [2022-11-03 01:42:46,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1553415381] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:46,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:42:46,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 01:42:46,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345683296] [2022-11-03 01:42:46,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:46,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:42:46,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:46,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:42:46,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:42:46,385 INFO L87 Difference]: Start difference. First operand 161 states and 213 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 01:42:46,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:46,557 INFO L93 Difference]: Finished difference Result 326 states and 440 transitions. [2022-11-03 01:42:46,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:42:46,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 75 [2022-11-03 01:42:46,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:46,561 INFO L225 Difference]: With dead ends: 326 [2022-11-03 01:42:46,562 INFO L226 Difference]: Without dead ends: 259 [2022-11-03 01:42:46,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:42:46,564 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 187 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:46,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 349 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:42:46,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-03 01:42:46,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 161. [2022-11-03 01:42:46,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.325) internal successors, (212), 160 states have internal predecessors, (212), 0 states have call successors, (0), 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 01:42:46,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 212 transitions. [2022-11-03 01:42:46,583 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 212 transitions. Word has length 75 [2022-11-03 01:42:46,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:46,583 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 212 transitions. [2022-11-03 01:42:46,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 01:42:46,584 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 212 transitions. [2022-11-03 01:42:46,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:42:46,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:46,586 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:46,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:46,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:46,798 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:46,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:46,799 INFO L85 PathProgramCache]: Analyzing trace with hash 304918867, now seen corresponding path program 1 times [2022-11-03 01:42:46,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:46,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985852683] [2022-11-03 01:42:46,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:46,799 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:46,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:46,800 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:46,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 01:42:46,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:46,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:42:46,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:42:47,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:42:47,257 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:47,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985852683] [2022-11-03 01:42:47,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985852683] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:47,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:42:47,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 01:42:47,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838604037] [2022-11-03 01:42:47,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:47,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:42:47,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:47,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:42:47,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:42:47,260 INFO L87 Difference]: Start difference. First operand 161 states and 212 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 01:42:47,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:47,446 INFO L93 Difference]: Finished difference Result 326 states and 437 transitions. [2022-11-03 01:42:47,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:42:47,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 75 [2022-11-03 01:42:47,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:47,448 INFO L225 Difference]: With dead ends: 326 [2022-11-03 01:42:47,448 INFO L226 Difference]: Without dead ends: 259 [2022-11-03 01:42:47,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:42:47,449 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 183 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:47,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 350 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:42:47,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-03 01:42:47,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 161. [2022-11-03 01:42:47,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.31875) internal successors, (211), 160 states have internal predecessors, (211), 0 states have call successors, (0), 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 01:42:47,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 211 transitions. [2022-11-03 01:42:47,458 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 211 transitions. Word has length 75 [2022-11-03 01:42:47,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:47,459 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 211 transitions. [2022-11-03 01:42:47,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 01:42:47,459 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 211 transitions. [2022-11-03 01:42:47,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:42:47,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:47,460 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:47,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:47,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:47,666 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:47,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:47,667 INFO L85 PathProgramCache]: Analyzing trace with hash -2066820395, now seen corresponding path program 1 times [2022-11-03 01:42:47,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:47,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967584825] [2022-11-03 01:42:47,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:47,667 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:47,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:47,668 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:47,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 01:42:47,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:47,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:42:47,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 25 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:42:48,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:42:48,102 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:48,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967584825] [2022-11-03 01:42:48,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967584825] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:48,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:42:48,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 01:42:48,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656072874] [2022-11-03 01:42:48,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:48,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:42:48,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:48,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:42:48,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:42:48,108 INFO L87 Difference]: Start difference. First operand 161 states and 211 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 01:42:48,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:48,286 INFO L93 Difference]: Finished difference Result 326 states and 434 transitions. [2022-11-03 01:42:48,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:42:48,287 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 75 [2022-11-03 01:42:48,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:48,288 INFO L225 Difference]: With dead ends: 326 [2022-11-03 01:42:48,289 INFO L226 Difference]: Without dead ends: 259 [2022-11-03 01:42:48,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:42:48,291 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 177 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:48,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 357 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:42:48,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-03 01:42:48,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 161. [2022-11-03 01:42:48,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.3125) internal successors, (210), 160 states have internal predecessors, (210), 0 states have call successors, (0), 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 01:42:48,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 210 transitions. [2022-11-03 01:42:48,308 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 210 transitions. Word has length 75 [2022-11-03 01:42:48,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:48,308 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 210 transitions. [2022-11-03 01:42:48,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 01:42:48,308 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 210 transitions. [2022-11-03 01:42:48,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:42:48,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:48,312 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 01:42:48,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:48,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:48,525 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:48,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:48,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1926271785, now seen corresponding path program 1 times [2022-11-03 01:42:48,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:48,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148488045] [2022-11-03 01:42:48,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:48,527 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:48,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:48,527 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:48,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 01:42:48,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:48,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:42:48,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 23 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:42:48,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:42:49,003 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:49,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148488045] [2022-11-03 01:42:49,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148488045] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:49,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:42:49,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 01:42:49,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632550872] [2022-11-03 01:42:49,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:49,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:42:49,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:49,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:42:49,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:42:49,005 INFO L87 Difference]: Start difference. First operand 161 states and 210 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 01:42:49,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:49,175 INFO L93 Difference]: Finished difference Result 326 states and 431 transitions. [2022-11-03 01:42:49,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:42:49,176 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 75 [2022-11-03 01:42:49,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:49,177 INFO L225 Difference]: With dead ends: 326 [2022-11-03 01:42:49,177 INFO L226 Difference]: Without dead ends: 259 [2022-11-03 01:42:49,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:42:49,178 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 175 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:49,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 352 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:42:49,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-03 01:42:49,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 161. [2022-11-03 01:42:49,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.30625) internal successors, (209), 160 states have internal predecessors, (209), 0 states have call successors, (0), 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 01:42:49,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 209 transitions. [2022-11-03 01:42:49,186 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 209 transitions. Word has length 75 [2022-11-03 01:42:49,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:49,186 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 209 transitions. [2022-11-03 01:42:49,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 01:42:49,187 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 209 transitions. [2022-11-03 01:42:49,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:42:49,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:49,188 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 01:42:49,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-11-03 01:42:49,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:49,400 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:49,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:49,400 INFO L85 PathProgramCache]: Analyzing trace with hash 563257177, now seen corresponding path program 1 times [2022-11-03 01:42:49,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:49,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564974260] [2022-11-03 01:42:49,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:49,400 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:49,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:49,401 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:49,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 01:42:49,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:49,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:42:49,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:42:49,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:42:49,854 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:49,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564974260] [2022-11-03 01:42:49,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564974260] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:49,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:42:49,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 01:42:49,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886105471] [2022-11-03 01:42:49,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:49,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:42:49,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:49,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:42:49,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:42:49,856 INFO L87 Difference]: Start difference. First operand 161 states and 209 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 01:42:50,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:50,031 INFO L93 Difference]: Finished difference Result 326 states and 428 transitions. [2022-11-03 01:42:50,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:42:50,031 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 75 [2022-11-03 01:42:50,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:50,033 INFO L225 Difference]: With dead ends: 326 [2022-11-03 01:42:50,033 INFO L226 Difference]: Without dead ends: 259 [2022-11-03 01:42:50,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:42:50,034 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 171 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:50,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 353 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:42:50,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-03 01:42:50,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 161. [2022-11-03 01:42:50,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.3) internal successors, (208), 160 states have internal predecessors, (208), 0 states have call successors, (0), 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 01:42:50,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 208 transitions. [2022-11-03 01:42:50,042 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 208 transitions. Word has length 75 [2022-11-03 01:42:50,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:50,043 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 208 transitions. [2022-11-03 01:42:50,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 01:42:50,043 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 208 transitions. [2022-11-03 01:42:50,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:42:50,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:50,044 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 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 01:42:50,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:50,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:50,256 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:50,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:50,257 INFO L85 PathProgramCache]: Analyzing trace with hash 985959003, now seen corresponding path program 1 times [2022-11-03 01:42:50,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:50,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77866382] [2022-11-03 01:42:50,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:50,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:50,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:50,258 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:50,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 01:42:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:50,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:42:50,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:42:50,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:42:50,694 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:50,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77866382] [2022-11-03 01:42:50,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [77866382] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:50,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:42:50,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 01:42:50,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283720998] [2022-11-03 01:42:50,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:50,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:42:50,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:50,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:42:50,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:42:50,696 INFO L87 Difference]: Start difference. First operand 161 states and 208 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 01:42:50,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:50,877 INFO L93 Difference]: Finished difference Result 326 states and 426 transitions. [2022-11-03 01:42:50,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:42:50,878 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 75 [2022-11-03 01:42:50,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:50,880 INFO L225 Difference]: With dead ends: 326 [2022-11-03 01:42:50,880 INFO L226 Difference]: Without dead ends: 259 [2022-11-03 01:42:50,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:42:50,881 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 162 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:50,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 364 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:42:50,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-03 01:42:50,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 161. [2022-11-03 01:42:50,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.29375) internal successors, (207), 160 states have internal predecessors, (207), 0 states have call successors, (0), 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 01:42:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 207 transitions. [2022-11-03 01:42:50,892 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 207 transitions. Word has length 75 [2022-11-03 01:42:50,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:50,892 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 207 transitions. [2022-11-03 01:42:50,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 01:42:50,900 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 207 transitions. [2022-11-03 01:42:50,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:42:50,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:50,901 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 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 01:42:50,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-11-03 01:42:51,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:51,106 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:51,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:51,107 INFO L85 PathProgramCache]: Analyzing trace with hash -602388899, now seen corresponding path program 1 times [2022-11-03 01:42:51,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:51,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838313409] [2022-11-03 01:42:51,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:51,107 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:51,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:51,108 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:51,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 01:42:51,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:51,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:42:51,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:51,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:51,519 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:51,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838313409] [2022-11-03 01:42:51,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838313409] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:51,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2056047541] [2022-11-03 01:42:51,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:51,519 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:42:51,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:42:51,520 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:42:51,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-03 01:42:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:51,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:42:51,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:42:51,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:51,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2056047541] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:51,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:42:51,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 01:42:51,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93471424] [2022-11-03 01:42:51,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:51,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:42:51,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:51,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:42:51,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:42:51,787 INFO L87 Difference]: Start difference. First operand 161 states and 207 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 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 01:42:51,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:51,921 INFO L93 Difference]: Finished difference Result 328 states and 427 transitions. [2022-11-03 01:42:51,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:42:51,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 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) Word has length 75 [2022-11-03 01:42:51,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:51,923 INFO L225 Difference]: With dead ends: 328 [2022-11-03 01:42:51,923 INFO L226 Difference]: Without dead ends: 261 [2022-11-03 01:42:51,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:42:51,924 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 126 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:51,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 282 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:42:51,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-03 01:42:51,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 161. [2022-11-03 01:42:51,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.2875) internal successors, (206), 160 states have internal predecessors, (206), 0 states have call successors, (0), 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 01:42:51,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 206 transitions. [2022-11-03 01:42:51,932 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 206 transitions. Word has length 75 [2022-11-03 01:42:51,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:51,933 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 206 transitions. [2022-11-03 01:42:51,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 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 01:42:51,933 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 206 transitions. [2022-11-03 01:42:51,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:42:51,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:51,934 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 01:42:51,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:52,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-03 01:42:52,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:52,337 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:52,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:52,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1189194913, now seen corresponding path program 1 times [2022-11-03 01:42:52,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:52,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779076485] [2022-11-03 01:42:52,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:52,338 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:52,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:52,339 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:52,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 01:42:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:52,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:42:52,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:52,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:52,755 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:52,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779076485] [2022-11-03 01:42:52,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779076485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:52,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [986529177] [2022-11-03 01:42:52,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:52,755 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:42:52,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:42:52,757 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:42:52,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-03 01:42:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:53,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:42:53,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:53,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:53,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [986529177] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:53,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779395694] [2022-11-03 01:42:53,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:53,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:53,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:53,209 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:53,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-03 01:42:53,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:53,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:42:53,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:53,441 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:53,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:53,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779395694] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:53,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:42:53,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-03 01:42:53,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279531933] [2022-11-03 01:42:53,548 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:42:53,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:42:53,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:53,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:42:53,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:42:53,551 INFO L87 Difference]: Start difference. First operand 161 states and 206 transitions. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 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 01:42:53,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:53,885 INFO L93 Difference]: Finished difference Result 665 states and 892 transitions. [2022-11-03 01:42:53,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 01:42:53,887 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 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 75 [2022-11-03 01:42:53,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:53,889 INFO L225 Difference]: With dead ends: 665 [2022-11-03 01:42:53,889 INFO L226 Difference]: Without dead ends: 563 [2022-11-03 01:42:53,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2022-11-03 01:42:53,890 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 841 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:53,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 373 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:42:53,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-11-03 01:42:53,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 283. [2022-11-03 01:42:53,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 1.322695035460993) internal successors, (373), 282 states have internal predecessors, (373), 0 states have call successors, (0), 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 01:42:53,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 373 transitions. [2022-11-03 01:42:53,907 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 373 transitions. Word has length 75 [2022-11-03 01:42:53,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:53,907 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 373 transitions. [2022-11-03 01:42:53,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 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 01:42:53,907 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 373 transitions. [2022-11-03 01:42:53,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:42:53,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:53,909 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 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 01:42:53,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:54,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-11-03 01:42:54,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-03 01:42:54,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:54,522 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:54,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:54,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1825908705, now seen corresponding path program 1 times [2022-11-03 01:42:54,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:54,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594561387] [2022-11-03 01:42:54,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:54,523 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:54,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:54,524 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:54,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 01:42:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:54,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 01:42:54,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:55,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:58,166 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:58,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594561387] [2022-11-03 01:42:58,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594561387] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:58,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [296155245] [2022-11-03 01:42:58,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:58,167 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:42:58,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:42:58,167 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:42:58,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-03 01:42:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:58,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 01:42:58,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:58,838 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:58,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:59,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [296155245] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:59,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468928967] [2022-11-03 01:42:59,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:59,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:59,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:59,555 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:59,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-03 01:42:59,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:59,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-03 01:42:59,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:00,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:01,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468928967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:01,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:43:01,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21, 21, 22, 22] total 42 [2022-11-03 01:43:01,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211442138] [2022-11-03 01:43:01,054 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:01,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 01:43:01,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:01,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 01:43:01,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1591, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 01:43:01,056 INFO L87 Difference]: Start difference. First operand 283 states and 373 transitions. Second operand has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 0 states have call successors, (0), 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 01:43:07,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:07,648 INFO L93 Difference]: Finished difference Result 1353 states and 1791 transitions. [2022-11-03 01:43:07,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-03 01:43:07,649 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 0 states have call successors, (0), 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 75 [2022-11-03 01:43:07,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:07,653 INFO L225 Difference]: With dead ends: 1353 [2022-11-03 01:43:07,653 INFO L226 Difference]: Without dead ends: 1351 [2022-11-03 01:43:07,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 405 SyntacticMatches, 8 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3408 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=2049, Invalid=10383, Unknown=0, NotChecked=0, Total=12432 [2022-11-03 01:43:07,657 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 1688 mSDsluCounter, 2442 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1688 SdHoareTripleChecker+Valid, 2567 SdHoareTripleChecker+Invalid, 2317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1578 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:07,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1688 Valid, 2567 Invalid, 2317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 656 Invalid, 0 Unknown, 1578 Unchecked, 0.7s Time] [2022-11-03 01:43:07,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2022-11-03 01:43:07,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 397. [2022-11-03 01:43:07,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 1.3358585858585859) internal successors, (529), 396 states have internal predecessors, (529), 0 states have call successors, (0), 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 01:43:07,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 529 transitions. [2022-11-03 01:43:07,698 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 529 transitions. Word has length 75 [2022-11-03 01:43:07,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:07,698 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 529 transitions. [2022-11-03 01:43:07,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 0 states have call successors, (0), 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 01:43:07,698 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 529 transitions. [2022-11-03 01:43:07,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:43:07,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:07,700 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 01:43:07,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:07,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-11-03 01:43:08,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-03 01:43:08,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:08,314 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:08,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:08,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1898295263, now seen corresponding path program 1 times [2022-11-03 01:43:08,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:08,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102455125] [2022-11-03 01:43:08,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:08,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:08,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:08,316 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:08,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 01:43:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:08,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:43:08,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:08,599 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:08,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:08,703 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:08,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102455125] [2022-11-03 01:43:08,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102455125] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:08,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1721865507] [2022-11-03 01:43:08,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:08,704 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:43:08,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:43:08,707 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:43:08,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-03 01:43:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:08,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:43:08,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:09,088 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:09,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:09,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1721865507] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:09,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622468273] [2022-11-03 01:43:09,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:09,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:09,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:09,163 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:09,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-03 01:43:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:09,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:43:09,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:09,391 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:09,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:09,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622468273] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:09,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:43:09,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-03 01:43:09,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49488292] [2022-11-03 01:43:09,466 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:09,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:43:09,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:09,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:43:09,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:43:09,467 INFO L87 Difference]: Start difference. First operand 397 states and 529 transitions. Second operand has 11 states, 11 states have (on average 9.0) internal successors, (99), 11 states have internal predecessors, (99), 0 states have call successors, (0), 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 01:43:09,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:09,792 INFO L93 Difference]: Finished difference Result 1872 states and 2524 transitions. [2022-11-03 01:43:09,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:43:09,795 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.0) internal successors, (99), 11 states have internal predecessors, (99), 0 states have call successors, (0), 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 75 [2022-11-03 01:43:09,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:09,800 INFO L225 Difference]: With dead ends: 1872 [2022-11-03 01:43:09,800 INFO L226 Difference]: Without dead ends: 1503 [2022-11-03 01:43:09,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:43:09,802 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 759 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:09,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [759 Valid, 425 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:09,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2022-11-03 01:43:09,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 563. [2022-11-03 01:43:09,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 1.3434163701067616) internal successors, (755), 562 states have internal predecessors, (755), 0 states have call successors, (0), 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 01:43:09,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 755 transitions. [2022-11-03 01:43:09,864 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 755 transitions. Word has length 75 [2022-11-03 01:43:09,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:09,864 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 755 transitions. [2022-11-03 01:43:09,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.0) internal successors, (99), 11 states have internal predecessors, (99), 0 states have call successors, (0), 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 01:43:09,865 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 755 transitions. [2022-11-03 01:43:09,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:43:09,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:09,866 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 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 01:43:09,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:10,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-11-03 01:43:10,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-03 01:43:10,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:10,470 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:10,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:10,471 INFO L85 PathProgramCache]: Analyzing trace with hash 454101407, now seen corresponding path program 1 times [2022-11-03 01:43:10,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:10,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681168906] [2022-11-03 01:43:10,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:10,471 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:10,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:10,473 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:10,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 01:43:10,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:10,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:43:10,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:43:10,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:10,664 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:10,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681168906] [2022-11-03 01:43:10,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681168906] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:10,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:10,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:43:10,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437910222] [2022-11-03 01:43:10,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:10,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:43:10,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:10,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:43:10,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:10,667 INFO L87 Difference]: Start difference. First operand 563 states and 755 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 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 01:43:10,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:10,752 INFO L93 Difference]: Finished difference Result 1357 states and 1826 transitions. [2022-11-03 01:43:10,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:43:10,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 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 75 [2022-11-03 01:43:10,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:10,755 INFO L225 Difference]: With dead ends: 1357 [2022-11-03 01:43:10,756 INFO L226 Difference]: Without dead ends: 820 [2022-11-03 01:43:10,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 72 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 01:43:10,757 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 197 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:10,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 220 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:43:10,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-11-03 01:43:10,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 563. [2022-11-03 01:43:10,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 1.3149466192170818) internal successors, (739), 562 states have internal predecessors, (739), 0 states have call successors, (0), 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 01:43:10,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 739 transitions. [2022-11-03 01:43:10,803 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 739 transitions. Word has length 75 [2022-11-03 01:43:10,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:10,804 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 739 transitions. [2022-11-03 01:43:10,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 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 01:43:10,804 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 739 transitions. [2022-11-03 01:43:10,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:43:10,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:10,806 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 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 01:43:10,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:11,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:11,018 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:11,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:11,019 INFO L85 PathProgramCache]: Analyzing trace with hash -529896545, now seen corresponding path program 1 times [2022-11-03 01:43:11,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:11,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119542651] [2022-11-03 01:43:11,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:11,019 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:11,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:11,022 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:11,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 01:43:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:11,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:43:11,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:11,282 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:43:11,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:11,283 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:11,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119542651] [2022-11-03 01:43:11,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119542651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:11,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:11,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:43:11,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235679639] [2022-11-03 01:43:11,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:11,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:43:11,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:11,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:43:11,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:43:11,285 INFO L87 Difference]: Start difference. First operand 563 states and 739 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 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 01:43:11,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:11,452 INFO L93 Difference]: Finished difference Result 1354 states and 1763 transitions. [2022-11-03 01:43:11,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:43:11,454 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 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 75 [2022-11-03 01:43:11,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:11,456 INFO L225 Difference]: With dead ends: 1354 [2022-11-03 01:43:11,456 INFO L226 Difference]: Without dead ends: 817 [2022-11-03 01:43:11,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:43:11,458 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 153 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:11,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 336 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-11-03 01:43:11,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-11-03 01:43:11,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 583. [2022-11-03 01:43:11,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 1.3075601374570447) internal successors, (761), 582 states have internal predecessors, (761), 0 states have call successors, (0), 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 01:43:11,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 761 transitions. [2022-11-03 01:43:11,497 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 761 transitions. Word has length 75 [2022-11-03 01:43:11,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:11,498 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 761 transitions. [2022-11-03 01:43:11,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 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 01:43:11,498 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 761 transitions. [2022-11-03 01:43:11,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:43:11,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:11,499 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 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 01:43:11,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:11,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:11,712 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:11,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:11,713 INFO L85 PathProgramCache]: Analyzing trace with hash -858332003, now seen corresponding path program 1 times [2022-11-03 01:43:11,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:11,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1512528125] [2022-11-03 01:43:11,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:11,713 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:11,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:11,714 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:11,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 01:43:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:11,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:43:11,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:43:11,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:11,977 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:11,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1512528125] [2022-11-03 01:43:11,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1512528125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:11,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:11,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:43:11,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366643912] [2022-11-03 01:43:11,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:11,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:43:11,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:11,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:43:11,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:43:11,979 INFO L87 Difference]: Start difference. First operand 583 states and 761 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 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 01:43:12,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:12,125 INFO L93 Difference]: Finished difference Result 1228 states and 1601 transitions. [2022-11-03 01:43:12,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:43:12,126 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 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 75 [2022-11-03 01:43:12,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:12,128 INFO L225 Difference]: With dead ends: 1228 [2022-11-03 01:43:12,128 INFO L226 Difference]: Without dead ends: 683 [2022-11-03 01:43:12,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:43:12,130 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 112 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:12,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 428 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-11-03 01:43:12,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-11-03 01:43:12,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 575. [2022-11-03 01:43:12,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.3083623693379791) internal successors, (751), 574 states have internal predecessors, (751), 0 states have call successors, (0), 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 01:43:12,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 751 transitions. [2022-11-03 01:43:12,170 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 751 transitions. Word has length 75 [2022-11-03 01:43:12,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:12,170 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 751 transitions. [2022-11-03 01:43:12,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 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 01:43:12,171 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 751 transitions. [2022-11-03 01:43:12,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:43:12,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:12,172 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 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 01:43:12,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:12,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:12,385 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:12,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:12,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1303242831, now seen corresponding path program 1 times [2022-11-03 01:43:12,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:12,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196906281] [2022-11-03 01:43:12,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:12,386 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:12,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:12,387 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:12,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 01:43:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:12,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:43:12,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:12,741 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:43:12,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:12,803 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:43:12,803 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:12,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196906281] [2022-11-03 01:43:12,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196906281] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:12,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:43:12,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-03 01:43:12,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069474764] [2022-11-03 01:43:12,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:12,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:43:12,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:12,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:43:12,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:43:12,805 INFO L87 Difference]: Start difference. First operand 575 states and 751 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 01:43:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:12,987 INFO L93 Difference]: Finished difference Result 1151 states and 1488 transitions. [2022-11-03 01:43:12,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:43:12,987 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 75 [2022-11-03 01:43:12,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:12,990 INFO L225 Difference]: With dead ends: 1151 [2022-11-03 01:43:12,990 INFO L226 Difference]: Without dead ends: 614 [2022-11-03 01:43:12,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:43:12,992 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 201 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:12,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 239 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:12,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-11-03 01:43:13,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 511. [2022-11-03 01:43:13,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 1.2843137254901962) internal successors, (655), 510 states have internal predecessors, (655), 0 states have call successors, (0), 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 01:43:13,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 655 transitions. [2022-11-03 01:43:13,031 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 655 transitions. Word has length 75 [2022-11-03 01:43:13,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:13,032 INFO L495 AbstractCegarLoop]: Abstraction has 511 states and 655 transitions. [2022-11-03 01:43:13,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 01:43:13,032 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 655 transitions. [2022-11-03 01:43:13,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:43:13,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:13,033 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 01:43:13,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:13,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:13,246 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:13,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:13,246 INFO L85 PathProgramCache]: Analyzing trace with hash 385700911, now seen corresponding path program 2 times [2022-11-03 01:43:13,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:13,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259571350] [2022-11-03 01:43:13,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:43:13,247 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:13,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:13,248 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:13,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 01:43:13,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:43:13,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:43:13,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 01:43:13,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:13,799 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:43:13,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:14,545 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:43:14,545 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:14,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259571350] [2022-11-03 01:43:14,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259571350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:14,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1247255312] [2022-11-03 01:43:14,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:43:14,546 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:43:14,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:43:14,546 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:43:14,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-03 01:43:14,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:43:14,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:43:14,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 01:43:14,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:15,103 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:43:15,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:43:15,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1247255312] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:15,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779871291] [2022-11-03 01:43:15,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:43:15,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:15,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:15,495 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:15,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-03 01:43:15,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:43:15,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:43:15,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 01:43:15,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:43:15,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:43:16,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779871291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:16,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:43:16,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 12, 12] total 22 [2022-11-03 01:43:16,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061066345] [2022-11-03 01:43:16,359 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:16,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 01:43:16,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:16,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 01:43:16,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:43:16,361 INFO L87 Difference]: Start difference. First operand 511 states and 655 transitions. Second operand has 22 states, 22 states have (on average 6.7272727272727275) internal successors, (148), 22 states have internal predecessors, (148), 0 states have call successors, (0), 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 01:43:17,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:17,164 INFO L93 Difference]: Finished difference Result 669 states and 860 transitions. [2022-11-03 01:43:17,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 01:43:17,164 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.7272727272727275) internal successors, (148), 22 states have internal predecessors, (148), 0 states have call successors, (0), 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 75 [2022-11-03 01:43:17,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:17,166 INFO L225 Difference]: With dead ends: 669 [2022-11-03 01:43:17,166 INFO L226 Difference]: Without dead ends: 667 [2022-11-03 01:43:17,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 425 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 01:43:17,167 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 882 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 307 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:17,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [882 Valid, 504 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 169 Invalid, 0 Unknown, 307 Unchecked, 0.2s Time] [2022-11-03 01:43:17,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-11-03 01:43:17,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 331. [2022-11-03 01:43:17,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 1.2424242424242424) internal successors, (410), 330 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:17,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 410 transitions. [2022-11-03 01:43:17,198 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 410 transitions. Word has length 75 [2022-11-03 01:43:17,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:17,199 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 410 transitions. [2022-11-03 01:43:17,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.7272727272727275) internal successors, (148), 22 states have internal predecessors, (148), 0 states have call successors, (0), 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 01:43:17,199 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 410 transitions. [2022-11-03 01:43:17,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:43:17,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:17,200 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:17,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:17,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-11-03 01:43:17,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-11-03 01:43:17,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:17,804 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:17,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:17,804 INFO L85 PathProgramCache]: Analyzing trace with hash 223295559, now seen corresponding path program 1 times [2022-11-03 01:43:17,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:17,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1765896050] [2022-11-03 01:43:17,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:17,805 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:17,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:17,806 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:17,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 01:43:17,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:17,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 01:43:17,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:18,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:22,378 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:22,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1765896050] [2022-11-03 01:43:22,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1765896050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:22,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1234762852] [2022-11-03 01:43:22,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:22,379 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:43:22,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:43:22,380 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:43:22,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-03 01:43:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:22,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 01:43:22,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:23,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:23,954 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:23,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1234762852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:23,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240716652] [2022-11-03 01:43:23,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:23,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:23,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:23,956 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:23,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-03 01:43:24,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:24,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-03 01:43:24,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:24,698 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:24,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:25,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240716652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:25,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:43:25,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23, 23, 24, 24] total 46 [2022-11-03 01:43:25,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095221539] [2022-11-03 01:43:25,582 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:25,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-03 01:43:25,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:25,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-03 01:43:25,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1955, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 01:43:25,584 INFO L87 Difference]: Start difference. First operand 331 states and 410 transitions. Second operand has 46 states, 46 states have (on average 3.3043478260869565) internal successors, (152), 46 states have internal predecessors, (152), 0 states have call successors, (0), 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 01:43:27,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:27,922 INFO L93 Difference]: Finished difference Result 737 states and 926 transitions. [2022-11-03 01:43:27,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-03 01:43:27,922 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.3043478260869565) internal successors, (152), 46 states have internal predecessors, (152), 0 states have call successors, (0), 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 75 [2022-11-03 01:43:27,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:27,925 INFO L225 Difference]: With dead ends: 737 [2022-11-03 01:43:27,925 INFO L226 Difference]: Without dead ends: 735 [2022-11-03 01:43:27,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 399 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=507, Invalid=4463, Unknown=0, NotChecked=0, Total=4970 [2022-11-03 01:43:27,928 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 693 mSDsluCounter, 3603 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 3732 SdHoareTripleChecker+Invalid, 1321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 867 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:27,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [693 Valid, 3732 Invalid, 1321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 443 Invalid, 0 Unknown, 867 Unchecked, 0.4s Time] [2022-11-03 01:43:27,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-11-03 01:43:27,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 361. [2022-11-03 01:43:27,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.2305555555555556) internal successors, (443), 360 states have internal predecessors, (443), 0 states have call successors, (0), 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 01:43:27,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 443 transitions. [2022-11-03 01:43:27,958 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 443 transitions. Word has length 75 [2022-11-03 01:43:27,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:27,959 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 443 transitions. [2022-11-03 01:43:27,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.3043478260869565) internal successors, (152), 46 states have internal predecessors, (152), 0 states have call successors, (0), 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 01:43:27,959 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 443 transitions. [2022-11-03 01:43:27,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:43:27,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:27,960 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:27,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:28,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2022-11-03 01:43:28,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-11-03 01:43:28,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:28,573 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:28,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:28,573 INFO L85 PathProgramCache]: Analyzing trace with hash 295682117, now seen corresponding path program 1 times [2022-11-03 01:43:28,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:28,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130504373] [2022-11-03 01:43:28,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:28,574 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:28,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:28,575 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:28,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-03 01:43:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:28,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:43:28,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:28,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:28,931 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:28,931 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:28,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130504373] [2022-11-03 01:43:28,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130504373] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:28,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1165529691] [2022-11-03 01:43:28,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:28,931 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:43:28,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:43:28,934 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:43:28,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-03 01:43:29,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:29,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:43:29,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:29,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:29,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1165529691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:29,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037787924] [2022-11-03 01:43:29,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:29,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:29,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:29,409 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:29,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-03 01:43:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:29,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:43:29,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:29,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:29,697 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:29,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037787924] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:29,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:43:29,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-03 01:43:29,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825998500] [2022-11-03 01:43:29,698 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:29,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:43:29,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:29,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:43:29,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:43:29,699 INFO L87 Difference]: Start difference. First operand 361 states and 443 transitions. Second operand has 11 states, 11 states have (on average 9.0) internal successors, (99), 11 states have internal predecessors, (99), 0 states have call successors, (0), 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 01:43:29,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:29,968 INFO L93 Difference]: Finished difference Result 1190 states and 1482 transitions. [2022-11-03 01:43:29,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 01:43:29,969 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.0) internal successors, (99), 11 states have internal predecessors, (99), 0 states have call successors, (0), 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 75 [2022-11-03 01:43:29,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:29,971 INFO L225 Difference]: With dead ends: 1190 [2022-11-03 01:43:29,971 INFO L226 Difference]: Without dead ends: 897 [2022-11-03 01:43:29,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:43:29,972 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 392 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:29,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 674 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:29,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-11-03 01:43:29,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 375. [2022-11-03 01:43:29,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 1.2272727272727273) internal successors, (459), 374 states have internal predecessors, (459), 0 states have call successors, (0), 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 01:43:29,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 459 transitions. [2022-11-03 01:43:29,999 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 459 transitions. Word has length 75 [2022-11-03 01:43:30,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:30,000 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 459 transitions. [2022-11-03 01:43:30,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.0) internal successors, (99), 11 states have internal predecessors, (99), 0 states have call successors, (0), 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 01:43:30,000 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 459 transitions. [2022-11-03 01:43:30,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:43:30,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:30,001 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:30,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2022-11-03 01:43:30,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-11-03 01:43:30,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-11-03 01:43:30,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:30,602 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:30,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:30,603 INFO L85 PathProgramCache]: Analyzing trace with hash -652723447, now seen corresponding path program 1 times [2022-11-03 01:43:30,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:30,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1750002192] [2022-11-03 01:43:30,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:30,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:30,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:30,604 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:30,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 01:43:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:30,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:43:30,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:43:30,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:30,849 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:30,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1750002192] [2022-11-03 01:43:30,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1750002192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:30,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:30,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:43:30,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447571654] [2022-11-03 01:43:30,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:30,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:43:30,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:30,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:43:30,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:43:30,851 INFO L87 Difference]: Start difference. First operand 375 states and 459 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 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 01:43:30,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:30,944 INFO L93 Difference]: Finished difference Result 717 states and 879 transitions. [2022-11-03 01:43:30,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:43:30,944 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 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 75 [2022-11-03 01:43:30,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:30,946 INFO L225 Difference]: With dead ends: 717 [2022-11-03 01:43:30,946 INFO L226 Difference]: Without dead ends: 410 [2022-11-03 01:43:30,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:43:30,947 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 65 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:30,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 316 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-11-03 01:43:30,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-11-03 01:43:30,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 361. [2022-11-03 01:43:30,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.2277777777777779) internal successors, (442), 360 states have internal predecessors, (442), 0 states have call successors, (0), 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 01:43:30,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 442 transitions. [2022-11-03 01:43:30,984 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 442 transitions. Word has length 75 [2022-11-03 01:43:30,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:30,985 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 442 transitions. [2022-11-03 01:43:30,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 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 01:43:30,985 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 442 transitions. [2022-11-03 01:43:30,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 01:43:30,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:30,987 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:30,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:31,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:31,199 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:31,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:31,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1540869949, now seen corresponding path program 2 times [2022-11-03 01:43:31,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:31,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175521887] [2022-11-03 01:43:31,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:43:31,200 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:31,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:31,201 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:31,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-03 01:43:31,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:43:31,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:43:31,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:43:31,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 74 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:43:31,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:43:31,671 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:31,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175521887] [2022-11-03 01:43:31,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175521887] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:31,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:43:31,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-03 01:43:31,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143240376] [2022-11-03 01:43:31,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:31,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:43:31,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:31,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:43:31,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:43:31,674 INFO L87 Difference]: Start difference. First operand 361 states and 442 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 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 01:43:31,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:31,833 INFO L93 Difference]: Finished difference Result 684 states and 839 transitions. [2022-11-03 01:43:31,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:43:31,834 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 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 110 [2022-11-03 01:43:31,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:31,836 INFO L225 Difference]: With dead ends: 684 [2022-11-03 01:43:31,836 INFO L226 Difference]: Without dead ends: 391 [2022-11-03 01:43:31,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:43:31,837 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 181 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:31,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 210 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:31,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-11-03 01:43:31,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 300. [2022-11-03 01:43:31,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 1.2073578595317727) internal successors, (361), 299 states have internal predecessors, (361), 0 states have call successors, (0), 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 01:43:31,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 361 transitions. [2022-11-03 01:43:31,861 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 361 transitions. Word has length 110 [2022-11-03 01:43:31,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:31,861 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 361 transitions. [2022-11-03 01:43:31,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 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 01:43:31,861 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 361 transitions. [2022-11-03 01:43:31,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 01:43:31,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:31,863 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:31,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:32,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:32,076 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:32,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:32,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1212434491, now seen corresponding path program 2 times [2022-11-03 01:43:32,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:32,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765486200] [2022-11-03 01:43:32,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:43:32,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:32,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:32,077 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:32,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-03 01:43:32,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:43:32,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:43:32,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:43:32,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 74 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 01:43:32,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 01:43:32,540 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:32,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765486200] [2022-11-03 01:43:32,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765486200] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:32,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:43:32,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-03 01:43:32,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600711661] [2022-11-03 01:43:32,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:32,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:43:32,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:32,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:43:32,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:43:32,541 INFO L87 Difference]: Start difference. First operand 300 states and 361 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 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 01:43:32,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:32,693 INFO L93 Difference]: Finished difference Result 522 states and 629 transitions. [2022-11-03 01:43:32,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:43:32,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 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 110 [2022-11-03 01:43:32,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:32,694 INFO L225 Difference]: With dead ends: 522 [2022-11-03 01:43:32,694 INFO L226 Difference]: Without dead ends: 282 [2022-11-03 01:43:32,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:43:32,695 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 208 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:32,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 193 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:32,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-11-03 01:43:32,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 214. [2022-11-03 01:43:32,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.1784037558685445) internal successors, (251), 213 states have internal predecessors, (251), 0 states have call successors, (0), 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 01:43:32,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 251 transitions. [2022-11-03 01:43:32,708 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 251 transitions. Word has length 110 [2022-11-03 01:43:32,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:32,708 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 251 transitions. [2022-11-03 01:43:32,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 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 01:43:32,708 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 251 transitions. [2022-11-03 01:43:32,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 01:43:32,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:32,709 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:32,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:32,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:32,909 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:32,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:32,910 INFO L85 PathProgramCache]: Analyzing trace with hash -2000905243, now seen corresponding path program 3 times [2022-11-03 01:43:32,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:32,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371013489] [2022-11-03 01:43:32,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:43:32,910 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:32,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:32,911 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:32,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-03 01:43:33,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 01:43:33,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:43:33,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-03 01:43:33,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:34,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:42,296 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:42,296 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:42,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371013489] [2022-11-03 01:43:42,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371013489] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:42,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [87409121] [2022-11-03 01:43:42,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:43:42,297 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:43:42,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:43:42,298 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:43:42,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-03 01:43:42,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 01:43:42,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:43:42,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-03 01:43:42,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:43,505 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:43,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:44,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [87409121] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:44,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295491084] [2022-11-03 01:43:44,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:43:44,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:44,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:44,710 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:44,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-03 01:43:44,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 01:43:44,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:43:44,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-03 01:43:44,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:45,814 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:45,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:47,244 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:47,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295491084] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:47,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:43:47,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34, 34, 35, 35] total 68 [2022-11-03 01:43:47,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195212962] [2022-11-03 01:43:47,245 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:47,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-03 01:43:47,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:47,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-03 01:43:47,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4365, Unknown=0, NotChecked=0, Total=4556 [2022-11-03 01:43:47,249 INFO L87 Difference]: Start difference. First operand 214 states and 251 transitions. Second operand has 68 states, 68 states have (on average 3.264705882352941) internal successors, (222), 68 states have internal predecessors, (222), 0 states have call successors, (0), 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 01:44:01,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:01,114 INFO L93 Difference]: Finished difference Result 1295 states and 1577 transitions. [2022-11-03 01:44:01,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-03 01:44:01,114 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.264705882352941) internal successors, (222), 68 states have internal predecessors, (222), 0 states have call successors, (0), 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 110 [2022-11-03 01:44:01,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:01,118 INFO L225 Difference]: With dead ends: 1295 [2022-11-03 01:44:01,119 INFO L226 Difference]: Without dead ends: 1293 [2022-11-03 01:44:01,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 757 GetRequests, 596 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5162 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=2345, Invalid=23415, Unknown=0, NotChecked=0, Total=25760 [2022-11-03 01:44:01,123 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 2982 mSDsluCounter, 4925 mSDsCounter, 0 mSdLazyCounter, 1710 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2982 SdHoareTripleChecker+Valid, 5048 SdHoareTripleChecker+Invalid, 5862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3946 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:01,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2982 Valid, 5048 Invalid, 5862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1710 Invalid, 0 Unknown, 3946 Unchecked, 1.5s Time] [2022-11-03 01:44:01,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2022-11-03 01:44:01,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 345. [2022-11-03 01:44:01,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.188953488372093) internal successors, (409), 344 states have internal predecessors, (409), 0 states have call successors, (0), 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 01:44:01,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 409 transitions. [2022-11-03 01:44:01,153 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 409 transitions. Word has length 110 [2022-11-03 01:44:01,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:01,153 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 409 transitions. [2022-11-03 01:44:01,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.264705882352941) internal successors, (222), 68 states have internal predecessors, (222), 0 states have call successors, (0), 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 01:44:01,153 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 409 transitions. [2022-11-03 01:44:01,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 01:44:01,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:01,154 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 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 01:44:01,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-11-03 01:44:01,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:01,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 0 [2022-11-03 01:44:01,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:44:01,755 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:01,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:01,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1928518685, now seen corresponding path program 1 times [2022-11-03 01:44:01,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:01,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [791758667] [2022-11-03 01:44:01,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:01,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:01,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:01,758 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:01,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-03 01:44:01,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:01,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:44:01,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 64 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:02,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 64 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:02,594 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:44:02,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [791758667] [2022-11-03 01:44:02,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [791758667] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:02,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1402016969] [2022-11-03 01:44:02,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:02,595 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:44:02,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:44:02,596 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:44:02,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-03 01:44:02,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:02,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:44:02,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 64 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:03,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 64 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:03,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1402016969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:03,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437440060] [2022-11-03 01:44:03,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:03,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:03,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:03,331 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:03,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-03 01:44:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:03,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:44:03,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 64 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:03,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:03,863 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 64 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:03,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437440060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:03,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:44:03,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 19 [2022-11-03 01:44:03,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380402628] [2022-11-03 01:44:03,864 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:03,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 01:44:03,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:44:03,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 01:44:03,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:44:03,866 INFO L87 Difference]: Start difference. First operand 345 states and 409 transitions. Second operand has 19 states, 19 states have (on average 8.894736842105264) internal successors, (169), 19 states have internal predecessors, (169), 0 states have call successors, (0), 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 01:44:05,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:05,009 INFO L93 Difference]: Finished difference Result 2112 states and 2529 transitions. [2022-11-03 01:44:05,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-03 01:44:05,010 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 8.894736842105264) internal successors, (169), 19 states have internal predecessors, (169), 0 states have call successors, (0), 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 110 [2022-11-03 01:44:05,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:05,013 INFO L225 Difference]: With dead ends: 2112 [2022-11-03 01:44:05,013 INFO L226 Difference]: Without dead ends: 1803 [2022-11-03 01:44:05,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 637 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=647, Invalid=2323, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 01:44:05,015 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 1813 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1813 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:05,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1813 Valid, 866 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:44:05,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2022-11-03 01:44:05,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 546. [2022-11-03 01:44:05,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 1.1724770642201834) internal successors, (639), 545 states have internal predecessors, (639), 0 states have call successors, (0), 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 01:44:05,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 639 transitions. [2022-11-03 01:44:05,057 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 639 transitions. Word has length 110 [2022-11-03 01:44:05,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:05,058 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 639 transitions. [2022-11-03 01:44:05,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.894736842105264) internal successors, (169), 19 states have internal predecessors, (169), 0 states have call successors, (0), 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 01:44:05,058 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 639 transitions. [2022-11-03 01:44:05,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 01:44:05,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:05,059 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:05,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:05,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-11-03 01:44:05,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-11-03 01:44:05,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:44:05,664 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:05,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:05,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1418043047, now seen corresponding path program 4 times [2022-11-03 01:44:05,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:05,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431921305] [2022-11-03 01:44:05,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:44:05,665 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:05,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:05,666 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:05,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-03 01:44:05,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:44:05,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:05,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:44:05,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 74 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 01:44:06,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 01:44:06,160 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:44:06,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431921305] [2022-11-03 01:44:06,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431921305] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:06,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:44:06,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 01:44:06,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522036158] [2022-11-03 01:44:06,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:06,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:44:06,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:44:06,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:44:06,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:44:06,162 INFO L87 Difference]: Start difference. First operand 546 states and 639 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 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 01:44:06,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:06,332 INFO L93 Difference]: Finished difference Result 1124 states and 1321 transitions. [2022-11-03 01:44:06,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:44:06,333 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 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 110 [2022-11-03 01:44:06,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:06,334 INFO L225 Difference]: With dead ends: 1124 [2022-11-03 01:44:06,334 INFO L226 Difference]: Without dead ends: 600 [2022-11-03 01:44:06,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-03 01:44:06,335 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 155 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:06,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 258 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:44:06,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-11-03 01:44:06,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 526. [2022-11-03 01:44:06,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 1.16) internal successors, (609), 525 states have internal predecessors, (609), 0 states have call successors, (0), 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 01:44:06,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 609 transitions. [2022-11-03 01:44:06,386 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 609 transitions. Word has length 110 [2022-11-03 01:44:06,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:06,386 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 609 transitions. [2022-11-03 01:44:06,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 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 01:44:06,387 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 609 transitions. [2022-11-03 01:44:06,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 01:44:06,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:06,388 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:06,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:06,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:44:06,601 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:06,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:06,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1973839641, now seen corresponding path program 1 times [2022-11-03 01:44:06,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:06,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2064064126] [2022-11-03 01:44:06,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:06,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:06,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:06,605 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:06,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-03 01:44:06,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:06,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:44:06,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 01:44:06,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:44:06,841 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:44:06,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2064064126] [2022-11-03 01:44:06,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2064064126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:06,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:44:06,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:44:06,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201745009] [2022-11-03 01:44:06,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:06,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:44:06,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:44:06,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:44:06,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:44:06,843 INFO L87 Difference]: Start difference. First operand 526 states and 609 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 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 01:44:06,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:06,947 INFO L93 Difference]: Finished difference Result 1317 states and 1536 transitions. [2022-11-03 01:44:06,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:44:06,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 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 110 [2022-11-03 01:44:06,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:06,951 INFO L225 Difference]: With dead ends: 1317 [2022-11-03 01:44:06,951 INFO L226 Difference]: Without dead ends: 793 [2022-11-03 01:44:06,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 107 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 01:44:06,952 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 174 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:06,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 211 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:44:06,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-11-03 01:44:06,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 526. [2022-11-03 01:44:06,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 1.1447619047619049) internal successors, (601), 525 states have internal predecessors, (601), 0 states have call successors, (0), 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 01:44:06,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 601 transitions. [2022-11-03 01:44:06,990 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 601 transitions. Word has length 110 [2022-11-03 01:44:06,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:06,991 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 601 transitions. [2022-11-03 01:44:06,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 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 01:44:06,991 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 601 transitions. [2022-11-03 01:44:06,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 01:44:06,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:06,993 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:07,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:07,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:44:07,209 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:07,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:07,209 INFO L85 PathProgramCache]: Analyzing trace with hash 425866597, now seen corresponding path program 1 times [2022-11-03 01:44:07,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:07,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517576373] [2022-11-03 01:44:07,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:07,209 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:07,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:07,210 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:07,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-03 01:44:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:07,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:44:07,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 01:44:07,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:44:07,501 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:44:07,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517576373] [2022-11-03 01:44:07,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517576373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:07,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:44:07,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:44:07,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743047177] [2022-11-03 01:44:07,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:07,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:44:07,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:44:07,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:44:07,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:44:07,503 INFO L87 Difference]: Start difference. First operand 526 states and 601 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 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 01:44:07,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:07,660 INFO L93 Difference]: Finished difference Result 1260 states and 1448 transitions. [2022-11-03 01:44:07,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:44:07,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 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 110 [2022-11-03 01:44:07,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:07,663 INFO L225 Difference]: With dead ends: 1260 [2022-11-03 01:44:07,663 INFO L226 Difference]: Without dead ends: 736 [2022-11-03 01:44:07,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:44:07,664 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 146 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:07,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 342 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-11-03 01:44:07,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-11-03 01:44:07,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 556. [2022-11-03 01:44:07,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 1.1513513513513514) internal successors, (639), 555 states have internal predecessors, (639), 0 states have call successors, (0), 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 01:44:07,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 639 transitions. [2022-11-03 01:44:07,706 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 639 transitions. Word has length 110 [2022-11-03 01:44:07,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:07,706 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 639 transitions. [2022-11-03 01:44:07,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 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 01:44:07,706 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 639 transitions. [2022-11-03 01:44:07,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 01:44:07,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:07,707 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:07,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-11-03 01:44:07,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:44:07,908 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:07,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:07,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1891633321, now seen corresponding path program 1 times [2022-11-03 01:44:07,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:07,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662754051] [2022-11-03 01:44:07,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:07,909 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:07,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:07,909 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:07,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-03 01:44:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:08,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:44:08,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 01:44:08,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:44:08,193 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:44:08,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662754051] [2022-11-03 01:44:08,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662754051] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:08,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:44:08,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:44:08,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856487656] [2022-11-03 01:44:08,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:08,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:44:08,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:44:08,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:44:08,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:44:08,195 INFO L87 Difference]: Start difference. First operand 556 states and 639 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 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 01:44:08,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:08,341 INFO L93 Difference]: Finished difference Result 1160 states and 1329 transitions. [2022-11-03 01:44:08,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:44:08,341 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 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 110 [2022-11-03 01:44:08,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:08,343 INFO L225 Difference]: With dead ends: 1160 [2022-11-03 01:44:08,343 INFO L226 Difference]: Without dead ends: 632 [2022-11-03 01:44:08,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:44:08,344 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 144 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:08,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 332 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-03 01:44:08,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-11-03 01:44:08,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 552. [2022-11-03 01:44:08,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 1.148820326678766) internal successors, (633), 551 states have internal predecessors, (633), 0 states have call successors, (0), 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 01:44:08,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 633 transitions. [2022-11-03 01:44:08,383 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 633 transitions. Word has length 110 [2022-11-03 01:44:08,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:08,383 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 633 transitions. [2022-11-03 01:44:08,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 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 01:44:08,383 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 633 transitions. [2022-11-03 01:44:08,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 01:44:08,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:08,384 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:08,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:08,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:44:08,594 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:08,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:08,595 INFO L85 PathProgramCache]: Analyzing trace with hash -649520025, now seen corresponding path program 1 times [2022-11-03 01:44:08,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:08,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528535262] [2022-11-03 01:44:08,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:08,596 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:08,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:08,597 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:08,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-03 01:44:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:08,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:44:08,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 01:44:08,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:44:08,881 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:44:08,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528535262] [2022-11-03 01:44:08,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528535262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:08,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:44:08,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:44:08,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443180449] [2022-11-03 01:44:08,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:08,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:44:08,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:44:08,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:44:08,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:44:08,883 INFO L87 Difference]: Start difference. First operand 552 states and 633 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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 01:44:09,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:09,020 INFO L93 Difference]: Finished difference Result 1152 states and 1317 transitions. [2022-11-03 01:44:09,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:44:09,020 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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 110 [2022-11-03 01:44:09,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:09,022 INFO L225 Difference]: With dead ends: 1152 [2022-11-03 01:44:09,022 INFO L226 Difference]: Without dead ends: 624 [2022-11-03 01:44:09,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:44:09,023 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 142 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:09,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 319 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-03 01:44:09,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-11-03 01:44:09,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 552. [2022-11-03 01:44:09,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 1.1451905626134302) internal successors, (631), 551 states have internal predecessors, (631), 0 states have call successors, (0), 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 01:44:09,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 631 transitions. [2022-11-03 01:44:09,067 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 631 transitions. Word has length 110 [2022-11-03 01:44:09,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:09,067 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 631 transitions. [2022-11-03 01:44:09,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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 01:44:09,068 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 631 transitions. [2022-11-03 01:44:09,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 01:44:09,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:09,069 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:09,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:09,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:44:09,278 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:09,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:09,279 INFO L85 PathProgramCache]: Analyzing trace with hash -399834137, now seen corresponding path program 1 times [2022-11-03 01:44:09,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:09,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902867357] [2022-11-03 01:44:09,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:09,280 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:09,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:09,280 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:09,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 01:44:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:09,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:44:09,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-03 01:44:09,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:44:09,560 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:44:09,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902867357] [2022-11-03 01:44:09,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902867357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:09,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:44:09,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:44:09,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143892725] [2022-11-03 01:44:09,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:09,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:44:09,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:44:09,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:44:09,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:44:09,562 INFO L87 Difference]: Start difference. First operand 552 states and 631 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 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 01:44:09,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:09,701 INFO L93 Difference]: Finished difference Result 1146 states and 1307 transitions. [2022-11-03 01:44:09,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:44:09,702 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 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 110 [2022-11-03 01:44:09,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:09,703 INFO L225 Difference]: With dead ends: 1146 [2022-11-03 01:44:09,703 INFO L226 Difference]: Without dead ends: 616 [2022-11-03 01:44:09,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:44:09,704 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 140 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:09,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 276 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-11-03 01:44:09,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-11-03 01:44:09,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 552. [2022-11-03 01:44:09,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 1.1415607985480944) internal successors, (629), 551 states have internal predecessors, (629), 0 states have call successors, (0), 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 01:44:09,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 629 transitions. [2022-11-03 01:44:09,749 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 629 transitions. Word has length 110 [2022-11-03 01:44:09,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:09,749 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 629 transitions. [2022-11-03 01:44:09,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 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 01:44:09,750 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 629 transitions. [2022-11-03 01:44:09,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 01:44:09,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:09,751 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:09,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-03 01:44:09,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:44:09,963 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:09,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:09,963 INFO L85 PathProgramCache]: Analyzing trace with hash -969864345, now seen corresponding path program 1 times [2022-11-03 01:44:09,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:09,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [994390421] [2022-11-03 01:44:09,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:09,964 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:09,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:09,964 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:09,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-03 01:44:10,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:10,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:44:10,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-03 01:44:10,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:44:10,241 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:44:10,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [994390421] [2022-11-03 01:44:10,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [994390421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:10,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:44:10,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:44:10,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587244119] [2022-11-03 01:44:10,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:10,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:44:10,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:44:10,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:44:10,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:44:10,243 INFO L87 Difference]: Start difference. First operand 552 states and 629 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:10,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:10,381 INFO L93 Difference]: Finished difference Result 1107 states and 1262 transitions. [2022-11-03 01:44:10,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:44:10,381 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-11-03 01:44:10,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:10,383 INFO L225 Difference]: With dead ends: 1107 [2022-11-03 01:44:10,383 INFO L226 Difference]: Without dead ends: 575 [2022-11-03 01:44:10,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:44:10,384 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 105 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:10,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 354 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-03 01:44:10,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-11-03 01:44:10,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 544. [2022-11-03 01:44:10,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 1.141804788213628) internal successors, (620), 543 states have internal predecessors, (620), 0 states have call successors, (0), 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 01:44:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 620 transitions. [2022-11-03 01:44:10,422 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 620 transitions. Word has length 110 [2022-11-03 01:44:10,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:10,422 INFO L495 AbstractCegarLoop]: Abstraction has 544 states and 620 transitions. [2022-11-03 01:44:10,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:10,423 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 620 transitions. [2022-11-03 01:44:10,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 01:44:10,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:10,424 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2022-11-03 01:44:10,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:10,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:44:10,637 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:10,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:10,638 INFO L85 PathProgramCache]: Analyzing trace with hash 179896767, now seen corresponding path program 2 times [2022-11-03 01:44:10,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:10,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887458941] [2022-11-03 01:44:10,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:44:10,639 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:10,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:10,640 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:10,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-03 01:44:10,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:44:10,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:10,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 01:44:10,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 65 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:11,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:11,994 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 66 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:11,995 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:44:11,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887458941] [2022-11-03 01:44:11,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887458941] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:11,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [792615087] [2022-11-03 01:44:11,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:44:11,995 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:44:11,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:44:11,997 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:44:12,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2022-11-03 01:44:12,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:44:12,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:12,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 01:44:12,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 65 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:12,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 66 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:13,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [792615087] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:13,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067361418] [2022-11-03 01:44:13,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:44:13,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:13,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:13,057 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:13,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-03 01:44:13,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:44:13,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:13,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 01:44:13,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 65 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:13,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:13,901 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 66 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:13,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067361418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:13,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:44:13,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15, 14, 15, 14] total 27 [2022-11-03 01:44:13,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370764861] [2022-11-03 01:44:13,902 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:13,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 01:44:13,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:44:13,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 01:44:13,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-11-03 01:44:13,904 INFO L87 Difference]: Start difference. First operand 544 states and 620 transitions. Second operand has 27 states, 27 states have (on average 6.925925925925926) internal successors, (187), 27 states have internal predecessors, (187), 0 states have call successors, (0), 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 01:44:15,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:15,165 INFO L93 Difference]: Finished difference Result 2002 states and 2286 transitions. [2022-11-03 01:44:15,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-03 01:44:15,165 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.925925925925926) internal successors, (187), 27 states have internal predecessors, (187), 0 states have call successors, (0), 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 110 [2022-11-03 01:44:15,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:15,171 INFO L225 Difference]: With dead ends: 2002 [2022-11-03 01:44:15,171 INFO L226 Difference]: Without dead ends: 1478 [2022-11-03 01:44:15,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 633 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=341, Invalid=3081, Unknown=0, NotChecked=0, Total=3422 [2022-11-03 01:44:15,172 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 162 mSDsluCounter, 1958 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:15,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 2078 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 163 Unchecked, 0.1s Time] [2022-11-03 01:44:15,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2022-11-03 01:44:15,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 792. [2022-11-03 01:44:15,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 1.1504424778761062) internal successors, (910), 791 states have internal predecessors, (910), 0 states have call successors, (0), 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 01:44:15,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 910 transitions. [2022-11-03 01:44:15,228 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 910 transitions. Word has length 110 [2022-11-03 01:44:15,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:15,228 INFO L495 AbstractCegarLoop]: Abstraction has 792 states and 910 transitions. [2022-11-03 01:44:15,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.925925925925926) internal successors, (187), 27 states have internal predecessors, (187), 0 states have call successors, (0), 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 01:44:15,229 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 910 transitions. [2022-11-03 01:44:15,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 01:44:15,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:15,230 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:15,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (72)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:15,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-11-03 01:44:15,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-11-03 01:44:15,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:15,835 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:15,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:15,835 INFO L85 PathProgramCache]: Analyzing trace with hash 252283325, now seen corresponding path program 2 times [2022-11-03 01:44:15,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:15,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [427831433] [2022-11-03 01:44:15,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:44:15,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:15,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:15,838 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:15,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-03 01:44:16,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:44:16,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:16,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-03 01:44:16,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:20,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:29,330 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:44:29,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [427831433] [2022-11-03 01:44:29,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [427831433] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:29,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1388942194] [2022-11-03 01:44:29,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:44:29,331 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:44:29,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:44:29,331 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:44:29,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-03 01:44:29,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:44:29,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:29,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-03 01:44:29,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:31,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:32,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1388942194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:32,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338281474] [2022-11-03 01:44:32,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:44:32,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:32,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:32,655 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:32,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-03 01:44:32,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:44:32,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:32,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-03 01:44:32,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:34,769 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:34,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:36,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338281474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:36,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:44:36,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38, 38, 39, 39] total 76 [2022-11-03 01:44:36,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569891343] [2022-11-03 01:44:36,085 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:36,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-03 01:44:36,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:44:36,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-03 01:44:36,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=5342, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 01:44:36,087 INFO L87 Difference]: Start difference. First operand 792 states and 910 transitions. Second operand has 76 states, 76 states have (on average 2.9210526315789473) internal successors, (222), 76 states have internal predecessors, (222), 0 states have call successors, (0), 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 01:44:49,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:49,992 INFO L93 Difference]: Finished difference Result 1887 states and 2204 transitions. [2022-11-03 01:44:49,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-03 01:44:49,992 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.9210526315789473) internal successors, (222), 76 states have internal predecessors, (222), 0 states have call successors, (0), 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 110 [2022-11-03 01:44:49,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:49,996 INFO L225 Difference]: With dead ends: 1887 [2022-11-03 01:44:49,996 INFO L226 Difference]: Without dead ends: 1885 [2022-11-03 01:44:49,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 579 SyntacticMatches, 8 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3619 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=1380, Invalid=16176, Unknown=0, NotChecked=0, Total=17556 [2022-11-03 01:44:49,997 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 355 mSDsluCounter, 7296 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 7467 SdHoareTripleChecker+Invalid, 2281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2174 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:49,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 7467 Invalid, 2281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 2174 Unchecked, 0.2s Time] [2022-11-03 01:44:49,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2022-11-03 01:44:50,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 1081. [2022-11-03 01:44:50,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 1.1564814814814814) internal successors, (1249), 1080 states have internal predecessors, (1249), 0 states have call successors, (0), 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 01:44:50,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1249 transitions. [2022-11-03 01:44:50,088 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1249 transitions. Word has length 110 [2022-11-03 01:44:50,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:50,088 INFO L495 AbstractCegarLoop]: Abstraction has 1081 states and 1249 transitions. [2022-11-03 01:44:50,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.9210526315789473) internal successors, (222), 76 states have internal predecessors, (222), 0 states have call successors, (0), 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 01:44:50,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1249 transitions. [2022-11-03 01:44:50,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 01:44:50,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:50,090 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:50,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:50,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-03 01:44:50,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-11-03 01:44:50,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:50,698 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:50,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:50,699 INFO L85 PathProgramCache]: Analyzing trace with hash -228796933, now seen corresponding path program 3 times [2022-11-03 01:44:50,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:50,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532068738] [2022-11-03 01:44:50,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:44:50,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:50,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:50,701 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:50,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-03 01:44:50,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 01:44:50,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:50,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:44:50,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 74 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:44:51,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:51,552 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 75 proven. 23 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:44:51,552 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:44:51,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532068738] [2022-11-03 01:44:51,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532068738] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:51,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1418902547] [2022-11-03 01:44:51,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:44:51,553 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:44:51,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:44:51,554 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:44:51,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (78)] Waiting until timeout for monitored process [2022-11-03 01:44:51,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 01:44:51,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:51,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:44:51,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:52,182 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 74 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:44:52,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 75 proven. 23 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:44:52,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1418902547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:52,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980769458] [2022-11-03 01:44:52,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:44:52,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:52,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:52,324 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:52,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-11-03 01:44:52,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 01:44:52,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:52,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:44:52,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 74 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:44:52,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 75 proven. 23 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:44:52,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980769458] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:52,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:44:52,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 19 [2022-11-03 01:44:52,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029963754] [2022-11-03 01:44:52,989 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:52,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 01:44:52,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:44:52,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 01:44:52,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:44:52,990 INFO L87 Difference]: Start difference. First operand 1081 states and 1249 transitions. Second operand has 19 states, 19 states have (on average 8.31578947368421) internal successors, (158), 19 states have internal predecessors, (158), 0 states have call successors, (0), 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 01:44:53,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:53,533 INFO L93 Difference]: Finished difference Result 3208 states and 3705 transitions. [2022-11-03 01:44:53,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-03 01:44:53,534 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 8.31578947368421) internal successors, (158), 19 states have internal predecessors, (158), 0 states have call successors, (0), 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 110 [2022-11-03 01:44:53,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:53,539 INFO L225 Difference]: With dead ends: 3208 [2022-11-03 01:44:53,540 INFO L226 Difference]: Without dead ends: 2147 [2022-11-03 01:44:53,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 635 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-11-03 01:44:53,542 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 129 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:53,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 1097 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2022-11-03 01:44:53,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2022-11-03 01:44:53,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 1475. [2022-11-03 01:44:53,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1474 states have (on average 1.1451831750339212) internal successors, (1688), 1474 states have internal predecessors, (1688), 0 states have call successors, (0), 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 01:44:53,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 1688 transitions. [2022-11-03 01:44:53,674 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 1688 transitions. Word has length 110 [2022-11-03 01:44:53,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:53,674 INFO L495 AbstractCegarLoop]: Abstraction has 1475 states and 1688 transitions. [2022-11-03 01:44:53,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.31578947368421) internal successors, (158), 19 states have internal predecessors, (158), 0 states have call successors, (0), 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 01:44:53,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 1688 transitions. [2022-11-03 01:44:53,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 01:44:53,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:53,677 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:53,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (78)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:53,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Ended with exit code 0 [2022-11-03 01:44:54,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-11-03 01:44:54,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:54,282 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:54,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:54,282 INFO L85 PathProgramCache]: Analyzing trace with hash 420136513, now seen corresponding path program 1 times [2022-11-03 01:44:54,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:54,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [458781939] [2022-11-03 01:44:54,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:54,283 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:54,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:54,284 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:54,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-03 01:44:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:54,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-03 01:44:54,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:59,445 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:59,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:09,553 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:09,553 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:45:09,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [458781939] [2022-11-03 01:45:09,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [458781939] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:09,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1980224219] [2022-11-03 01:45:09,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:09,554 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:45:09,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:45:09,555 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:45:09,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (81)] Waiting until timeout for monitored process [2022-11-03 01:45:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:10,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-03 01:45:10,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:11,632 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:11,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:16,032 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:16,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1980224219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:16,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113440392] [2022-11-03 01:45:16,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:16,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:16,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:45:16,034 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:45:16,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-11-03 01:45:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:16,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-03 01:45:16,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:18,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:19,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113440392] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:19,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:45:19,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38, 38, 39, 39] total 80 [2022-11-03 01:45:19,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381795584] [2022-11-03 01:45:19,953 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:45:19,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-03 01:45:19,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:45:19,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-03 01:45:19,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=5938, Unknown=0, NotChecked=0, Total=6320 [2022-11-03 01:45:19,957 INFO L87 Difference]: Start difference. First operand 1475 states and 1688 transitions. Second operand has 80 states, 80 states have (on average 2.8375) internal successors, (227), 80 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 01:46:00,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:00,377 INFO L93 Difference]: Finished difference Result 3046 states and 3513 transitions. [2022-11-03 01:46:00,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-11-03 01:46:00,378 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.8375) internal successors, (227), 80 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) Word has length 110 [2022-11-03 01:46:00,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:00,383 INFO L225 Difference]: With dead ends: 3046 [2022-11-03 01:46:00,383 INFO L226 Difference]: Without dead ends: 3044 [2022-11-03 01:46:00,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 770 GetRequests, 573 SyntacticMatches, 3 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8412 ImplicationChecksByTransitivity, 56.0s TimeCoverageRelationStatistics Valid=3133, Invalid=35087, Unknown=0, NotChecked=0, Total=38220 [2022-11-03 01:46:00,387 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 390 mSDsluCounter, 7124 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 7296 SdHoareTripleChecker+Invalid, 3548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3469 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:00,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 7296 Invalid, 3548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 3469 Unchecked, 0.1s Time] [2022-11-03 01:46:00,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2022-11-03 01:46:00,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 1867. [2022-11-03 01:46:00,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 1.1484458735262595) internal successors, (2143), 1866 states have internal predecessors, (2143), 0 states have call successors, (0), 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 01:46:00,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 2143 transitions. [2022-11-03 01:46:00,585 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 2143 transitions. Word has length 110 [2022-11-03 01:46:00,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:00,586 INFO L495 AbstractCegarLoop]: Abstraction has 1867 states and 2143 transitions. [2022-11-03 01:46:00,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.8375) internal successors, (227), 80 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 01:46:00,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 2143 transitions. [2022-11-03 01:46:00,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 01:46:00,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:00,589 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:46:00,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:00,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:01,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (81)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:01,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:46:01,203 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:01,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:01,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1801259461, now seen corresponding path program 1 times [2022-11-03 01:46:01,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:01,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [506501777] [2022-11-03 01:46:01,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:01,204 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:01,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:01,206 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:01,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-03 01:46:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:01,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-03 01:46:01,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:07,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:46:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:19,990 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:19,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [506501777] [2022-11-03 01:46:19,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [506501777] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:46:19,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [33453691] [2022-11-03 01:46:19,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:19,991 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:46:19,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:46:19,992 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:46:19,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (84)] Waiting until timeout for monitored process [2022-11-03 01:46:20,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:20,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-03 01:46:20,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:22,486 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:22,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:46:28,907 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:28,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [33453691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:46:28,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111548156] [2022-11-03 01:46:28,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:28,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:46:28,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:46:28,911 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:46:28,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-11-03 01:46:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:29,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-03 01:46:29,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:31,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:46:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:33,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111548156] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:46:33,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:46:33,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38, 38, 39, 39] total 80 [2022-11-03 01:46:33,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63208389] [2022-11-03 01:46:33,594 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:46:33,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-03 01:46:33,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:33,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-03 01:46:33,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=5938, Unknown=1, NotChecked=0, Total=6320 [2022-11-03 01:46:33,596 INFO L87 Difference]: Start difference. First operand 1867 states and 2143 transitions. Second operand has 80 states, 80 states have (on average 2.8375) internal successors, (227), 80 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 01:46:57,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:57,936 INFO L93 Difference]: Finished difference Result 5522 states and 6359 transitions. [2022-11-03 01:46:57,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-03 01:46:57,937 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.8375) internal successors, (227), 80 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) Word has length 110 [2022-11-03 01:46:57,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:57,947 INFO L225 Difference]: With dead ends: 5522 [2022-11-03 01:46:57,947 INFO L226 Difference]: Without dead ends: 5520 [2022-11-03 01:46:57,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 575 SyntacticMatches, 6 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4669 ImplicationChecksByTransitivity, 44.1s TimeCoverageRelationStatistics Valid=1840, Invalid=21111, Unknown=1, NotChecked=0, Total=22952 [2022-11-03 01:46:57,952 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 527 mSDsluCounter, 9886 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 10109 SdHoareTripleChecker+Invalid, 4723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4539 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:57,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 10109 Invalid, 4723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 181 Invalid, 0 Unknown, 4539 Unchecked, 0.3s Time] [2022-11-03 01:46:57,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5520 states. [2022-11-03 01:46:58,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5520 to 3466. [2022-11-03 01:46:58,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3466 states, 3465 states have (on average 1.1503607503607503) internal successors, (3986), 3465 states have internal predecessors, (3986), 0 states have call successors, (0), 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 01:46:58,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3466 states to 3466 states and 3986 transitions. [2022-11-03 01:46:58,364 INFO L78 Accepts]: Start accepts. Automaton has 3466 states and 3986 transitions. Word has length 110 [2022-11-03 01:46:58,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:58,364 INFO L495 AbstractCegarLoop]: Abstraction has 3466 states and 3986 transitions. [2022-11-03 01:46:58,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.8375) internal successors, (227), 80 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 01:46:58,365 INFO L276 IsEmpty]: Start isEmpty. Operand 3466 states and 3986 transitions. [2022-11-03 01:46:58,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 01:46:58,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:58,369 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:46:58,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:58,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (84)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:58,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:58,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:46:58,986 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:58,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:58,987 INFO L85 PathProgramCache]: Analyzing trace with hash 492523071, now seen corresponding path program 1 times [2022-11-03 01:46:58,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:58,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527358462] [2022-11-03 01:46:58,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:58,988 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:58,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:58,989 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:58,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-03 01:46:59,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:59,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:46:59,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:59,607 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 81 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:59,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 87 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:00,002 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:00,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527358462] [2022-11-03 01:47:00,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527358462] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:00,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1315106171] [2022-11-03 01:47:00,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:00,003 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:47:00,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:47:00,004 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:47:00,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (87)] Waiting until timeout for monitored process [2022-11-03 01:47:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:00,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:47:00,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 81 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:00,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 87 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:00,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1315106171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:00,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241180431] [2022-11-03 01:47:00,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:00,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:00,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:47:00,863 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:47:00,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-11-03 01:47:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:01,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:47:01,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 81 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:01,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:01,482 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 87 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:01,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241180431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:01,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:47:01,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14, 13, 14, 13] total 22 [2022-11-03 01:47:01,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042828421] [2022-11-03 01:47:01,483 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:47:01,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 01:47:01,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:01,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 01:47:01,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:47:01,485 INFO L87 Difference]: Start difference. First operand 3466 states and 3986 transitions. Second operand has 22 states, 22 states have (on average 7.681818181818182) internal successors, (169), 22 states have internal predecessors, (169), 0 states have call successors, (0), 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 01:47:07,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:07,629 INFO L93 Difference]: Finished difference Result 14512 states and 16718 transitions. [2022-11-03 01:47:07,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-11-03 01:47:07,630 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 7.681818181818182) internal successors, (169), 22 states have internal predecessors, (169), 0 states have call successors, (0), 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 110 [2022-11-03 01:47:07,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:07,645 INFO L225 Difference]: With dead ends: 14512 [2022-11-03 01:47:07,645 INFO L226 Difference]: Without dead ends: 11066 [2022-11-03 01:47:07,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 787 GetRequests, 653 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6688 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3233, Invalid=15127, Unknown=0, NotChecked=0, Total=18360 [2022-11-03 01:47:07,650 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 1608 mSDsluCounter, 1826 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1608 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:07,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1608 Valid, 1986 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:47:07,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11066 states. [2022-11-03 01:47:08,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11066 to 3851. [2022-11-03 01:47:08,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3851 states, 3850 states have (on average 1.1485714285714286) internal successors, (4422), 3850 states have internal predecessors, (4422), 0 states have call successors, (0), 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 01:47:08,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3851 states to 3851 states and 4422 transitions. [2022-11-03 01:47:08,236 INFO L78 Accepts]: Start accepts. Automaton has 3851 states and 4422 transitions. Word has length 110 [2022-11-03 01:47:08,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:08,237 INFO L495 AbstractCegarLoop]: Abstraction has 3851 states and 4422 transitions. [2022-11-03 01:47:08,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.681818181818182) internal successors, (169), 22 states have internal predecessors, (169), 0 states have call successors, (0), 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 01:47:08,237 INFO L276 IsEmpty]: Start isEmpty. Operand 3851 states and 4422 transitions. [2022-11-03 01:47:08,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 01:47:08,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:08,240 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 01:47:08,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:08,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (87)] Ended with exit code 0 [2022-11-03 01:47:08,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Ended with exit code 0 [2022-11-03 01:47:08,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:47:08,841 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:08,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:08,842 INFO L85 PathProgramCache]: Analyzing trace with hash -248128381, now seen corresponding path program 1 times [2022-11-03 01:47:08,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:08,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2108433415] [2022-11-03 01:47:08,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:08,843 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:08,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:08,844 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:08,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-03 01:47:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:09,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-03 01:47:09,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:15,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:27,545 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:27,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2108433415] [2022-11-03 01:47:27,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2108433415] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:27,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1663077844] [2022-11-03 01:47:27,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:27,546 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:47:27,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:47:27,547 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:47:27,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (90)] Waiting until timeout for monitored process [2022-11-03 01:47:27,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:27,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-03 01:47:27,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:29,985 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:29,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:34,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1663077844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:34,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96032474] [2022-11-03 01:47:34,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:34,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:34,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:47:34,954 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:47:34,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-11-03 01:47:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:35,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-03 01:47:35,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:37,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:39,420 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:39,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96032474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:39,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:47:39,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38, 38, 39, 39] total 80 [2022-11-03 01:47:39,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245430096] [2022-11-03 01:47:39,421 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:47:39,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-03 01:47:39,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:39,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-03 01:47:39,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=5938, Unknown=0, NotChecked=0, Total=6320 [2022-11-03 01:47:39,426 INFO L87 Difference]: Start difference. First operand 3851 states and 4422 transitions. Second operand has 80 states, 80 states have (on average 2.8375) internal successors, (227), 80 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 01:48:18,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:18,005 INFO L93 Difference]: Finished difference Result 7090 states and 8145 transitions. [2022-11-03 01:48:18,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-11-03 01:48:18,006 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.8375) internal successors, (227), 80 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) Word has length 110 [2022-11-03 01:48:18,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:18,018 INFO L225 Difference]: With dead ends: 7090 [2022-11-03 01:48:18,018 INFO L226 Difference]: Without dead ends: 7088 [2022-11-03 01:48:18,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 582 SyntacticMatches, 3 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7111 ImplicationChecksByTransitivity, 56.5s TimeCoverageRelationStatistics Valid=2933, Invalid=30739, Unknown=0, NotChecked=0, Total=33672 [2022-11-03 01:48:18,022 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 552 mSDsluCounter, 9406 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 9611 SdHoareTripleChecker+Invalid, 5830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5646 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:18,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 9611 Invalid, 5830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 179 Invalid, 0 Unknown, 5646 Unchecked, 0.3s Time] [2022-11-03 01:48:18,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7088 states. [2022-11-03 01:48:18,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7088 to 2042. [2022-11-03 01:48:18,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2042 states, 2041 states have (on average 1.1464968152866242) internal successors, (2340), 2041 states have internal predecessors, (2340), 0 states have call successors, (0), 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 01:48:18,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2042 states to 2042 states and 2340 transitions. [2022-11-03 01:48:18,436 INFO L78 Accepts]: Start accepts. Automaton has 2042 states and 2340 transitions. Word has length 110 [2022-11-03 01:48:18,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:18,437 INFO L495 AbstractCegarLoop]: Abstraction has 2042 states and 2340 transitions. [2022-11-03 01:48:18,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.8375) internal successors, (227), 80 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 01:48:18,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2042 states and 2340 transitions. [2022-11-03 01:48:18,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 01:48:18,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:18,440 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:18,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Ended with exit code 0 [2022-11-03 01:48:18,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (90)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:18,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-11-03 01:48:19,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:19,041 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:19,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:19,041 INFO L85 PathProgramCache]: Analyzing trace with hash -805554753, now seen corresponding path program 1 times [2022-11-03 01:48:19,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:48:19,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521314164] [2022-11-03 01:48:19,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:19,042 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:48:19,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:48:19,043 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:48:19,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-03 01:48:19,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:19,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:48:19,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:19,466 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 74 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:48:19,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 89 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:48:19,686 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:48:19,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521314164] [2022-11-03 01:48:19,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521314164] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:19,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [625213070] [2022-11-03 01:48:19,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:19,686 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:48:19,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:48:19,688 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:48:19,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (93)] Waiting until timeout for monitored process [2022-11-03 01:48:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:20,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:48:20,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 74 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:48:20,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 89 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:48:20,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [625213070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:20,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397990463] [2022-11-03 01:48:20,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:20,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:20,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:20,373 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:48:20,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-11-03 01:48:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:20,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:48:20,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:20,702 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 74 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:48:20,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:20,831 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 89 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:48:20,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397990463] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:20,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:48:20,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10, 9, 10, 9] total 14 [2022-11-03 01:48:20,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638108632] [2022-11-03 01:48:20,832 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:48:20,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 01:48:20,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:48:20,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 01:48:20,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:48:20,833 INFO L87 Difference]: Start difference. First operand 2042 states and 2340 transitions. Second operand has 14 states, 14 states have (on average 9.071428571428571) internal successors, (127), 14 states have internal predecessors, (127), 0 states have call successors, (0), 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 01:48:22,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:22,706 INFO L93 Difference]: Finished difference Result 6029 states and 6877 transitions. [2022-11-03 01:48:22,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-03 01:48:22,706 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.071428571428571) internal successors, (127), 14 states have internal predecessors, (127), 0 states have call successors, (0), 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 110 [2022-11-03 01:48:22,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:22,712 INFO L225 Difference]: With dead ends: 6029 [2022-11-03 01:48:22,713 INFO L226 Difference]: Without dead ends: 4007 [2022-11-03 01:48:22,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 650 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=610, Invalid=2042, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 01:48:22,716 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 606 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:22,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 1146 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:48:22,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2022-11-03 01:48:23,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 2253. [2022-11-03 01:48:23,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 1.141651865008881) internal successors, (2571), 2252 states have internal predecessors, (2571), 0 states have call successors, (0), 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 01:48:23,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 2571 transitions. [2022-11-03 01:48:23,208 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 2571 transitions. Word has length 110 [2022-11-03 01:48:23,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:23,209 INFO L495 AbstractCegarLoop]: Abstraction has 2253 states and 2571 transitions. [2022-11-03 01:48:23,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.071428571428571) internal successors, (127), 14 states have internal predecessors, (127), 0 states have call successors, (0), 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 01:48:23,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 2571 transitions. [2022-11-03 01:48:23,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 01:48:23,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:23,213 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:23,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-11-03 01:48:23,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (93)] Ended with exit code 0 [2022-11-03 01:48:23,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Ended with exit code 0 [2022-11-03 01:48:23,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:48:23,814 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:23,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:23,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1286635011, now seen corresponding path program 2 times [2022-11-03 01:48:23,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:48:23,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639033286] [2022-11-03 01:48:23,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:48:23,816 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:48:23,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:48:23,817 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:48:23,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-03 01:48:24,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:48:24,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:48:24,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-03 01:48:24,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:30,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:43,092 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:43,093 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:48:43,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639033286] [2022-11-03 01:48:43,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639033286] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:43,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [904257907] [2022-11-03 01:48:43,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:48:43,094 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:48:43,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:48:43,095 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:48:43,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (96)] Waiting until timeout for monitored process [2022-11-03 01:48:43,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:48:43,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:48:43,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-03 01:48:43,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:45,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:47,403 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:47,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [904257907] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:47,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226202151] [2022-11-03 01:48:47,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:48:47,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:47,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:47,405 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:48:47,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-11-03 01:48:47,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:48:47,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:48:47,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-03 01:48:47,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:50,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:51,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226202151] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:51,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:48:51,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38, 38, 39, 39] total 76 [2022-11-03 01:48:51,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148009797] [2022-11-03 01:48:51,977 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:48:51,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-03 01:48:51,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:48:51,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-03 01:48:51,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=5342, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 01:48:51,979 INFO L87 Difference]: Start difference. First operand 2253 states and 2571 transitions. Second operand has 76 states, 76 states have (on average 2.9210526315789473) internal successors, (222), 76 states have internal predecessors, (222), 0 states have call successors, (0), 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 01:49:12,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:12,108 INFO L93 Difference]: Finished difference Result 3453 states and 3973 transitions. [2022-11-03 01:49:12,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-03 01:49:12,108 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.9210526315789473) internal successors, (222), 76 states have internal predecessors, (222), 0 states have call successors, (0), 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 110 [2022-11-03 01:49:12,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:12,111 INFO L225 Difference]: With dead ends: 3453 [2022-11-03 01:49:12,111 INFO L226 Difference]: Without dead ends: 3451 [2022-11-03 01:49:12,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 580 SyntacticMatches, 2 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3488 ImplicationChecksByTransitivity, 35.3s TimeCoverageRelationStatistics Valid=1550, Invalid=16272, Unknown=0, NotChecked=0, Total=17822 [2022-11-03 01:49:12,112 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 492 mSDsluCounter, 7405 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 7567 SdHoareTripleChecker+Invalid, 4694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4538 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:12,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 7567 Invalid, 4694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 152 Invalid, 0 Unknown, 4538 Unchecked, 0.3s Time] [2022-11-03 01:49:12,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3451 states. [2022-11-03 01:49:12,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3451 to 2488. [2022-11-03 01:49:12,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 1.1407318053880178) internal successors, (2837), 2487 states have internal predecessors, (2837), 0 states have call successors, (0), 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 01:49:12,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 2837 transitions. [2022-11-03 01:49:12,605 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 2837 transitions. Word has length 110 [2022-11-03 01:49:12,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:12,605 INFO L495 AbstractCegarLoop]: Abstraction has 2488 states and 2837 transitions. [2022-11-03 01:49:12,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.9210526315789473) internal successors, (222), 76 states have internal predecessors, (222), 0 states have call successors, (0), 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 01:49:12,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 2837 transitions. [2022-11-03 01:49:12,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 01:49:12,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:12,608 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:12,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Ended with exit code 0 [2022-11-03 01:49:12,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (96)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:13,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-11-03 01:49:13,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:13,209 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:13,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:13,209 INFO L85 PathProgramCache]: Analyzing trace with hash -585570433, now seen corresponding path program 3 times [2022-11-03 01:49:13,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:13,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848977441] [2022-11-03 01:49:13,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:49:13,210 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:13,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:13,211 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:13,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-03 01:49:13,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 01:49:13,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:49:13,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-03 01:49:13,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:20,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:32,264 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:32,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848977441] [2022-11-03 01:49:32,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848977441] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:49:32,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [190609316] [2022-11-03 01:49:32,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:49:32,265 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:49:32,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:49:32,266 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:49:32,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (99)] Waiting until timeout for monitored process [2022-11-03 01:49:32,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 01:49:32,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:49:32,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-03 01:49:32,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:34,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:36,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [190609316] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:49:36,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572650089] [2022-11-03 01:49:36,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:49:36,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:36,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:36,529 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:36,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-11-03 01:49:37,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 01:49:37,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:49:37,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-03 01:49:37,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:39,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:41,303 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:41,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572650089] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:49:41,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:49:41,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38, 38, 39, 39] total 76 [2022-11-03 01:49:41,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79090722] [2022-11-03 01:49:41,304 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:49:41,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-03 01:49:41,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:41,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-03 01:49:41,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=5342, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 01:49:41,306 INFO L87 Difference]: Start difference. First operand 2488 states and 2837 transitions. Second operand has 76 states, 76 states have (on average 2.9210526315789473) internal successors, (222), 76 states have internal predecessors, (222), 0 states have call successors, (0), 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 01:50:03,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:03,547 INFO L93 Difference]: Finished difference Result 3871 states and 4456 transitions. [2022-11-03 01:50:03,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-03 01:50:03,548 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.9210526315789473) internal successors, (222), 76 states have internal predecessors, (222), 0 states have call successors, (0), 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 110 [2022-11-03 01:50:03,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:03,551 INFO L225 Difference]: With dead ends: 3871 [2022-11-03 01:50:03,551 INFO L226 Difference]: Without dead ends: 3869 [2022-11-03 01:50:03,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 724 GetRequests, 579 SyntacticMatches, 3 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4076 ImplicationChecksByTransitivity, 37.3s TimeCoverageRelationStatistics Valid=1697, Invalid=18895, Unknown=0, NotChecked=0, Total=20592 [2022-11-03 01:50:03,552 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 434 mSDsluCounter, 9527 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 9741 SdHoareTripleChecker+Invalid, 3306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3202 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:03,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 9741 Invalid, 3306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 99 Invalid, 0 Unknown, 3202 Unchecked, 0.2s Time] [2022-11-03 01:50:03,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3869 states. [2022-11-03 01:50:03,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3869 to 2497. [2022-11-03 01:50:03,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2497 states, 2496 states have (on average 1.140625) internal successors, (2847), 2496 states have internal predecessors, (2847), 0 states have call successors, (0), 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 01:50:03,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2497 states to 2497 states and 2847 transitions. [2022-11-03 01:50:03,955 INFO L78 Accepts]: Start accepts. Automaton has 2497 states and 2847 transitions. Word has length 110 [2022-11-03 01:50:03,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:03,955 INFO L495 AbstractCegarLoop]: Abstraction has 2497 states and 2847 transitions. [2022-11-03 01:50:03,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.9210526315789473) internal successors, (222), 76 states have internal predecessors, (222), 0 states have call successors, (0), 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 01:50:03,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2497 states and 2847 transitions. [2022-11-03 01:50:03,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 01:50:03,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:03,959 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:03,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (99)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:04,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:04,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:04,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:04,564 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:04,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:04,565 INFO L85 PathProgramCache]: Analyzing trace with hash -638225987, now seen corresponding path program 1 times [2022-11-03 01:50:04,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:04,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250840502] [2022-11-03 01:50:04,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:04,566 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:04,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:04,567 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:04,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2022-11-03 01:50:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:04,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-03 01:50:04,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:11,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:23,273 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:23,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [250840502] [2022-11-03 01:50:23,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [250840502] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:50:23,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1072139904] [2022-11-03 01:50:23,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:23,274 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:50:23,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:50:23,275 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:50:23,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (102)] Waiting until timeout for monitored process [2022-11-03 01:50:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:23,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-03 01:50:23,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:25,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:27,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1072139904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:50:27,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804368284] [2022-11-03 01:50:27,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:27,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:27,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:27,513 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:50:27,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-11-03 01:50:27,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:27,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-03 01:50:27,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:30,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:32,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804368284] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:50:32,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:50:32,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38, 38, 39, 39] total 76 [2022-11-03 01:50:32,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647909882] [2022-11-03 01:50:32,111 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:50:32,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-03 01:50:32,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:32,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-03 01:50:32,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=5342, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 01:50:32,113 INFO L87 Difference]: Start difference. First operand 2497 states and 2847 transitions. Second operand has 76 states, 76 states have (on average 2.9210526315789473) internal successors, (222), 76 states have internal predecessors, (222), 0 states have call successors, (0), 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 01:51:18,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:18,939 INFO L93 Difference]: Finished difference Result 5686 states and 6488 transitions. [2022-11-03 01:51:18,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-11-03 01:51:18,940 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.9210526315789473) internal successors, (222), 76 states have internal predecessors, (222), 0 states have call successors, (0), 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 110 [2022-11-03 01:51:18,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:18,944 INFO L225 Difference]: With dead ends: 5686 [2022-11-03 01:51:18,944 INFO L226 Difference]: Without dead ends: 5684 [2022-11-03 01:51:18,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 583 SyntacticMatches, 10 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8634 ImplicationChecksByTransitivity, 61.4s TimeCoverageRelationStatistics Valid=2545, Invalid=34511, Unknown=0, NotChecked=0, Total=37056 [2022-11-03 01:51:18,947 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 411 mSDsluCounter, 7272 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 7453 SdHoareTripleChecker+Invalid, 5286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5185 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:18,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 7453 Invalid, 5286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 92 Invalid, 0 Unknown, 5185 Unchecked, 0.2s Time] [2022-11-03 01:51:18,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5684 states. [2022-11-03 01:51:19,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5684 to 4608. [2022-11-03 01:51:19,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4608 states, 4607 states have (on average 1.1373996092902106) internal successors, (5240), 4607 states have internal predecessors, (5240), 0 states have call successors, (0), 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 01:51:19,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4608 states to 4608 states and 5240 transitions. [2022-11-03 01:51:19,709 INFO L78 Accepts]: Start accepts. Automaton has 4608 states and 5240 transitions. Word has length 110 [2022-11-03 01:51:19,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:19,709 INFO L495 AbstractCegarLoop]: Abstraction has 4608 states and 5240 transitions. [2022-11-03 01:51:19,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.9210526315789473) internal successors, (222), 76 states have internal predecessors, (222), 0 states have call successors, (0), 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 01:51:19,709 INFO L276 IsEmpty]: Start isEmpty. Operand 4608 states and 5240 transitions. [2022-11-03 01:51:19,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 01:51:19,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:19,712 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:19,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (101)] Ended with exit code 0 [2022-11-03 01:51:19,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-11-03 01:51:20,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (102)] Ended with exit code 0 [2022-11-03 01:51:20,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:51:20,313 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:20,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:20,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1118781823, now seen corresponding path program 2 times [2022-11-03 01:51:20,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:20,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556179104] [2022-11-03 01:51:20,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:51:20,314 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:20,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:20,315 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:20,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-03 01:51:20,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:51:20,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:51:20,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-03 01:51:20,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:27,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:39,883 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:39,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556179104] [2022-11-03 01:51:39,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556179104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:39,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2011487878] [2022-11-03 01:51:39,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:51:39,883 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:51:39,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:51:39,884 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:51:39,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (105)] Waiting until timeout for monitored process [2022-11-03 01:51:40,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:51:40,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:51:40,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-03 01:51:40,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:42,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:43,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2011487878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:43,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406171540] [2022-11-03 01:51:43,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:51:43,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:43,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:51:43,955 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:51:43,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-11-03 01:51:44,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:51:44,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:51:44,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-03 01:51:44,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:46,793 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:46,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:48,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406171540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:48,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:51:48,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38, 38, 39, 39] total 76 [2022-11-03 01:51:48,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205627271] [2022-11-03 01:51:48,456 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:51:48,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-03 01:51:48,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:48,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-03 01:51:48,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=5342, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 01:51:48,458 INFO L87 Difference]: Start difference. First operand 4608 states and 5240 transitions. Second operand has 76 states, 76 states have (on average 2.9210526315789473) internal successors, (222), 76 states have internal predecessors, (222), 0 states have call successors, (0), 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 01:52:32,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:32,954 INFO L93 Difference]: Finished difference Result 6782 states and 7756 transitions. [2022-11-03 01:52:32,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-11-03 01:52:32,954 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.9210526315789473) internal successors, (222), 76 states have internal predecessors, (222), 0 states have call successors, (0), 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 110 [2022-11-03 01:52:32,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:32,959 INFO L225 Difference]: With dead ends: 6782 [2022-11-03 01:52:32,959 INFO L226 Difference]: Without dead ends: 6780 [2022-11-03 01:52:32,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 578 SyntacticMatches, 5 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7438 ImplicationChecksByTransitivity, 59.6s TimeCoverageRelationStatistics Valid=2634, Invalid=31406, Unknown=0, NotChecked=0, Total=34040 [2022-11-03 01:52:32,961 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 395 mSDsluCounter, 9121 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 9336 SdHoareTripleChecker+Invalid, 4028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3882 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:32,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 9336 Invalid, 4028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 143 Invalid, 0 Unknown, 3882 Unchecked, 0.2s Time] [2022-11-03 01:52:32,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6780 states. [2022-11-03 01:52:33,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6780 to 5222. [2022-11-03 01:52:33,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5222 states, 5221 states have (on average 1.1350316031411607) internal successors, (5926), 5221 states have internal predecessors, (5926), 0 states have call successors, (0), 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 01:52:33,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5222 states to 5222 states and 5926 transitions. [2022-11-03 01:52:33,774 INFO L78 Accepts]: Start accepts. Automaton has 5222 states and 5926 transitions. Word has length 110 [2022-11-03 01:52:33,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:33,774 INFO L495 AbstractCegarLoop]: Abstraction has 5222 states and 5926 transitions. [2022-11-03 01:52:33,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.9210526315789473) internal successors, (222), 76 states have internal predecessors, (222), 0 states have call successors, (0), 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 01:52:33,775 INFO L276 IsEmpty]: Start isEmpty. Operand 5222 states and 5926 transitions. [2022-11-03 01:52:33,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 01:52:33,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:33,779 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:33,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:33,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Ended with exit code 0 [2022-11-03 01:52:34,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (105)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:34,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:34,380 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:34,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:34,381 INFO L85 PathProgramCache]: Analyzing trace with hash 262341125, now seen corresponding path program 3 times [2022-11-03 01:52:34,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:34,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488138714] [2022-11-03 01:52:34,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:52:34,382 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:34,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:34,383 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:34,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2022-11-03 01:52:34,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 01:52:34,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:52:34,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-03 01:52:34,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:41,436 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:41,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:55,370 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:55,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488138714] [2022-11-03 01:52:55,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488138714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:55,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1968088997] [2022-11-03 01:52:55,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:52:55,371 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:55,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:52:55,372 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:52:55,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (108)] Waiting until timeout for monitored process [2022-11-03 01:52:55,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 01:52:55,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:52:55,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-03 01:52:55,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:57,975 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:57,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:59,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1968088997] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:59,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066990586] [2022-11-03 01:52:59,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:52:59,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:59,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:59,558 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:59,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-11-03 01:52:59,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 01:52:59,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:52:59,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-03 01:52:59,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:02,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:04,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066990586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:04,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:53:04,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38, 38, 39, 39] total 76 [2022-11-03 01:53:04,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656605940] [2022-11-03 01:53:04,259 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:53:04,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-03 01:53:04,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:04,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-03 01:53:04,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=5342, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 01:53:04,260 INFO L87 Difference]: Start difference. First operand 5222 states and 5926 transitions. Second operand has 76 states, 76 states have (on average 2.9210526315789473) internal successors, (222), 76 states have internal predecessors, (222), 0 states have call successors, (0), 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 01:53:41,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:41,379 INFO L93 Difference]: Finished difference Result 6839 states and 7803 transitions. [2022-11-03 01:53:41,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-03 01:53:41,380 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.9210526315789473) internal successors, (222), 76 states have internal predecessors, (222), 0 states have call successors, (0), 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 110 [2022-11-03 01:53:41,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:41,385 INFO L225 Difference]: With dead ends: 6839 [2022-11-03 01:53:41,385 INFO L226 Difference]: Without dead ends: 6837 [2022-11-03 01:53:41,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 735 GetRequests, 580 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4794 ImplicationChecksByTransitivity, 53.4s TimeCoverageRelationStatistics Valid=2029, Invalid=21841, Unknown=0, NotChecked=0, Total=23870 [2022-11-03 01:53:41,386 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 546 mSDsluCounter, 7911 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 8117 SdHoareTripleChecker+Invalid, 5906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5780 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:41,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 8117 Invalid, 5906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 121 Invalid, 0 Unknown, 5780 Unchecked, 0.2s Time] [2022-11-03 01:53:41,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6837 states. [2022-11-03 01:53:42,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6837 to 5070. [2022-11-03 01:53:42,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5070 states, 5069 states have (on average 1.1359242454132965) internal successors, (5758), 5069 states have internal predecessors, (5758), 0 states have call successors, (0), 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 01:53:42,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5070 states to 5070 states and 5758 transitions. [2022-11-03 01:53:42,138 INFO L78 Accepts]: Start accepts. Automaton has 5070 states and 5758 transitions. Word has length 110 [2022-11-03 01:53:42,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:42,138 INFO L495 AbstractCegarLoop]: Abstraction has 5070 states and 5758 transitions. [2022-11-03 01:53:42,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.9210526315789473) internal successors, (222), 76 states have internal predecessors, (222), 0 states have call successors, (0), 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 01:53:42,139 INFO L276 IsEmpty]: Start isEmpty. Operand 5070 states and 5758 transitions. [2022-11-03 01:53:42,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 01:53:42,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:42,142 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2022-11-03 01:53:42,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (107)] Ended with exit code 0 [2022-11-03 01:53:42,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (108)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:42,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:42,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:42,743 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:42,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:42,743 INFO L85 PathProgramCache]: Analyzing trace with hash 910750149, now seen corresponding path program 1 times [2022-11-03 01:53:42,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:42,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [783253713] [2022-11-03 01:53:42,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:42,744 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:42,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:42,745 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:42,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2022-11-03 01:53:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:43,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-03 01:53:43,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:50,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:03,641 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:03,641 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:03,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [783253713] [2022-11-03 01:54:03,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [783253713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:03,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [90144390] [2022-11-03 01:54:03,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:03,642 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:54:03,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:54:03,644 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:54:03,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (111)] Waiting until timeout for monitored process [2022-11-03 01:54:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:04,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-03 01:54:04,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:06,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:08,109 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:08,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [90144390] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:08,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476529140] [2022-11-03 01:54:08,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:08,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:08,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:08,111 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:08,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-11-03 01:54:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:08,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-03 01:54:08,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:11,386 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:11,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:13,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476529140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:13,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:54:13,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38, 38, 39, 39] total 76 [2022-11-03 01:54:13,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411496462] [2022-11-03 01:54:13,247 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:54:13,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-03 01:54:13,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:13,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-03 01:54:13,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=5342, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 01:54:13,248 INFO L87 Difference]: Start difference. First operand 5070 states and 5758 transitions. Second operand has 76 states, 76 states have (on average 2.9210526315789473) internal successors, (222), 76 states have internal predecessors, (222), 0 states have call successors, (0), 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 01:55:10,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:10,330 INFO L93 Difference]: Finished difference Result 6913 states and 7864 transitions. [2022-11-03 01:55:10,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-11-03 01:55:10,330 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.9210526315789473) internal successors, (222), 76 states have internal predecessors, (222), 0 states have call successors, (0), 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 110 [2022-11-03 01:55:10,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:10,336 INFO L225 Difference]: With dead ends: 6913 [2022-11-03 01:55:10,336 INFO L226 Difference]: Without dead ends: 6911 [2022-11-03 01:55:10,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 579 SyntacticMatches, 9 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8478 ImplicationChecksByTransitivity, 72.9s TimeCoverageRelationStatistics Valid=3364, Invalid=34466, Unknown=0, NotChecked=0, Total=37830 [2022-11-03 01:55:10,338 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 499 mSDsluCounter, 10358 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 10582 SdHoareTripleChecker+Invalid, 4588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4373 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:10,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 10582 Invalid, 4588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 212 Invalid, 0 Unknown, 4373 Unchecked, 0.3s Time] [2022-11-03 01:55:10,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6911 states. [2022-11-03 01:55:11,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6911 to 4749. [2022-11-03 01:55:11,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4749 states, 4748 states have (on average 1.137742207245156) internal successors, (5402), 4748 states have internal predecessors, (5402), 0 states have call successors, (0), 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 01:55:11,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4749 states to 4749 states and 5402 transitions. [2022-11-03 01:55:11,200 INFO L78 Accepts]: Start accepts. Automaton has 4749 states and 5402 transitions. Word has length 110 [2022-11-03 01:55:11,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:11,201 INFO L495 AbstractCegarLoop]: Abstraction has 4749 states and 5402 transitions. [2022-11-03 01:55:11,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.9210526315789473) internal successors, (222), 76 states have internal predecessors, (222), 0 states have call successors, (0), 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 01:55:11,201 INFO L276 IsEmpty]: Start isEmpty. Operand 4749 states and 5402 transitions. [2022-11-03 01:55:11,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 01:55:11,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:11,206 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-11-03 01:55:11,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-11-03 01:55:11,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (111)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:11,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (110)] Ended with exit code 0 [2022-11-03 01:55:11,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:11,807 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:11,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:11,808 INFO L85 PathProgramCache]: Analyzing trace with hash -257508089, now seen corresponding path program 2 times [2022-11-03 01:55:11,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:11,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646278373] [2022-11-03 01:55:11,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:55:11,809 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:11,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:11,810 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:11,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2022-11-03 01:55:12,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:55:12,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:55:12,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:55:12,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 127 proven. 17 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-03 01:55:12,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:12,462 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-03 01:55:12,462 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:12,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646278373] [2022-11-03 01:55:12,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646278373] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:55:12,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:55:12,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-03 01:55:12,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499538990] [2022-11-03 01:55:12,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:12,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:55:12,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:12,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:55:12,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:55:12,464 INFO L87 Difference]: Start difference. First operand 4749 states and 5402 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 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 01:55:13,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:13,378 INFO L93 Difference]: Finished difference Result 8926 states and 10197 transitions. [2022-11-03 01:55:13,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:55:13,379 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 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 145 [2022-11-03 01:55:13,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:13,382 INFO L225 Difference]: With dead ends: 8926 [2022-11-03 01:55:13,382 INFO L226 Difference]: Without dead ends: 4197 [2022-11-03 01:55:13,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:55:13,384 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 201 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:13,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 185 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:13,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4197 states. [2022-11-03 01:55:14,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4197 to 3955. [2022-11-03 01:55:14,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3955 states, 3954 states have (on average 1.1307536671724836) internal successors, (4471), 3954 states have internal predecessors, (4471), 0 states have call successors, (0), 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 01:55:14,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3955 states to 3955 states and 4471 transitions. [2022-11-03 01:55:14,330 INFO L78 Accepts]: Start accepts. Automaton has 3955 states and 4471 transitions. Word has length 145 [2022-11-03 01:55:14,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:14,330 INFO L495 AbstractCegarLoop]: Abstraction has 3955 states and 4471 transitions. [2022-11-03 01:55:14,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 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 01:55:14,331 INFO L276 IsEmpty]: Start isEmpty. Operand 3955 states and 4471 transitions. [2022-11-03 01:55:14,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 01:55:14,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:14,335 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-11-03 01:55:14,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (113)] Ended with exit code 0 [2022-11-03 01:55:14,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:14,538 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:14,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:14,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1208258635, now seen corresponding path program 5 times [2022-11-03 01:55:14,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:14,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859890929] [2022-11-03 01:55:14,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 01:55:14,540 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:14,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:14,541 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:14,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2022-11-03 01:55:14,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:55:14,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:55:14,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:55:14,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 01:55:14,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:14,957 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:14,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859890929] [2022-11-03 01:55:14,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859890929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:14,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:14,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:55:14,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283609673] [2022-11-03 01:55:14,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:14,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:55:14,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:14,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:55:14,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:55:14,959 INFO L87 Difference]: Start difference. First operand 3955 states and 4471 transitions. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 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 01:55:16,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:16,197 INFO L93 Difference]: Finished difference Result 7932 states and 8988 transitions. [2022-11-03 01:55:16,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:55:16,198 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 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 145 [2022-11-03 01:55:16,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:16,202 INFO L225 Difference]: With dead ends: 7932 [2022-11-03 01:55:16,203 INFO L226 Difference]: Without dead ends: 3816 [2022-11-03 01:55:16,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:55:16,207 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 183 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:16,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 238 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:55:16,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2022-11-03 01:55:17,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 3646. [2022-11-03 01:55:17,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3646 states, 3645 states have (on average 1.1311385459533607) internal successors, (4123), 3645 states have internal predecessors, (4123), 0 states have call successors, (0), 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 01:55:17,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3646 states to 3646 states and 4123 transitions. [2022-11-03 01:55:17,168 INFO L78 Accepts]: Start accepts. Automaton has 3646 states and 4123 transitions. Word has length 145 [2022-11-03 01:55:17,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:17,169 INFO L495 AbstractCegarLoop]: Abstraction has 3646 states and 4123 transitions. [2022-11-03 01:55:17,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 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 01:55:17,169 INFO L276 IsEmpty]: Start isEmpty. Operand 3646 states and 4123 transitions. [2022-11-03 01:55:17,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 01:55:17,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:17,174 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 01:55:17,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (114)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:17,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:17,375 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:17,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:17,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1332894711, now seen corresponding path program 6 times [2022-11-03 01:55:17,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:17,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517711073] [2022-11-03 01:55:17,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 01:55:17,377 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:17,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:17,378 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:17,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2022-11-03 01:55:17,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-03 01:55:17,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:55:17,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:55:17,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:18,153 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 141 proven. 31 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-03 01:55:18,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:18,315 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 01:55:18,315 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:18,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517711073] [2022-11-03 01:55:18,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517711073] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:55:18,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:55:18,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 12 [2022-11-03 01:55:18,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051535325] [2022-11-03 01:55:18,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:18,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:55:18,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:18,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:55:18,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:55:18,318 INFO L87 Difference]: Start difference. First operand 3646 states and 4123 transitions. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 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 01:55:19,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:19,419 INFO L93 Difference]: Finished difference Result 7433 states and 8409 transitions. [2022-11-03 01:55:19,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:55:19,420 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 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 145 [2022-11-03 01:55:19,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:19,423 INFO L225 Difference]: With dead ends: 7433 [2022-11-03 01:55:19,423 INFO L226 Difference]: Without dead ends: 3710 [2022-11-03 01:55:19,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:55:19,426 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 177 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:19,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 244 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:19,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3710 states. [2022-11-03 01:55:20,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3710 to 3537. [2022-11-03 01:55:20,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3537 states, 3536 states have (on average 1.1289592760180995) internal successors, (3992), 3536 states have internal predecessors, (3992), 0 states have call successors, (0), 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 01:55:20,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3537 states to 3537 states and 3992 transitions. [2022-11-03 01:55:20,355 INFO L78 Accepts]: Start accepts. Automaton has 3537 states and 3992 transitions. Word has length 145 [2022-11-03 01:55:20,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:20,356 INFO L495 AbstractCegarLoop]: Abstraction has 3537 states and 3992 transitions. [2022-11-03 01:55:20,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 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 01:55:20,356 INFO L276 IsEmpty]: Start isEmpty. Operand 3537 states and 3992 transitions. [2022-11-03 01:55:20,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 01:55:20,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:20,359 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 01:55:20,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (115)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:20,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:20,559 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:20,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:20,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1083208823, now seen corresponding path program 7 times [2022-11-03 01:55:20,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:20,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [953897299] [2022-11-03 01:55:20,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:55:20,560 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:20,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:20,561 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:20,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (116)] Waiting until timeout for monitored process [2022-11-03 01:55:20,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:20,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:55:20,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:21,093 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 121 proven. 11 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-03 01:55:21,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-03 01:55:21,178 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:21,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [953897299] [2022-11-03 01:55:21,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [953897299] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:55:21,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:55:21,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-03 01:55:21,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885497583] [2022-11-03 01:55:21,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:21,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:55:21,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:21,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:55:21,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:55:21,180 INFO L87 Difference]: Start difference. First operand 3537 states and 3992 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 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 01:55:21,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:21,995 INFO L93 Difference]: Finished difference Result 5399 states and 6092 transitions. [2022-11-03 01:55:21,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:55:21,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 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 145 [2022-11-03 01:55:21,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:21,999 INFO L225 Difference]: With dead ends: 5399 [2022-11-03 01:55:21,999 INFO L226 Difference]: Without dead ends: 3557 [2022-11-03 01:55:22,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:55:22,001 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 151 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:22,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 172 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:22,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2022-11-03 01:55:22,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 3535. [2022-11-03 01:55:22,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3534 states have (on average 1.1273344651952462) internal successors, (3984), 3534 states have internal predecessors, (3984), 0 states have call successors, (0), 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 01:55:22,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 3984 transitions. [2022-11-03 01:55:22,815 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 3984 transitions. Word has length 145 [2022-11-03 01:55:22,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:22,815 INFO L495 AbstractCegarLoop]: Abstraction has 3535 states and 3984 transitions. [2022-11-03 01:55:22,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 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 01:55:22,815 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 3984 transitions. [2022-11-03 01:55:22,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 01:55:22,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:22,820 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 01:55:22,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (116)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:23,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:23,020 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:23,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:23,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1653239031, now seen corresponding path program 8 times [2022-11-03 01:55:23,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:23,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [994230740] [2022-11-03 01:55:23,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:55:23,022 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:23,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:23,023 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:23,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2022-11-03 01:55:23,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:55:23,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:55:23,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:55:23,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 119 proven. 9 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-03 01:55:23,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:23,676 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-03 01:55:23,676 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:23,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [994230740] [2022-11-03 01:55:23,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [994230740] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:55:23,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:55:23,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-03 01:55:23,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224892028] [2022-11-03 01:55:23,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:23,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:55:23,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:23,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:55:23,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:55:23,678 INFO L87 Difference]: Start difference. First operand 3535 states and 3984 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 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 01:55:24,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:24,637 INFO L93 Difference]: Finished difference Result 5315 states and 5991 transitions. [2022-11-03 01:55:24,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:55:24,638 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 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 145 [2022-11-03 01:55:24,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:24,640 INFO L225 Difference]: With dead ends: 5315 [2022-11-03 01:55:24,640 INFO L226 Difference]: Without dead ends: 3473 [2022-11-03 01:55:24,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:55:24,642 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 181 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:24,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 161 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:24,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3473 states. [2022-11-03 01:55:25,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3473 to 3448. [2022-11-03 01:55:25,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3448 states, 3447 states have (on average 1.1282274441543372) internal successors, (3889), 3447 states have internal predecessors, (3889), 0 states have call successors, (0), 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 01:55:25,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3448 states to 3448 states and 3889 transitions. [2022-11-03 01:55:25,294 INFO L78 Accepts]: Start accepts. Automaton has 3448 states and 3889 transitions. Word has length 145 [2022-11-03 01:55:25,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:25,294 INFO L495 AbstractCegarLoop]: Abstraction has 3448 states and 3889 transitions. [2022-11-03 01:55:25,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 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 01:55:25,295 INFO L276 IsEmpty]: Start isEmpty. Operand 3448 states and 3889 transitions. [2022-11-03 01:55:25,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 01:55:25,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:25,297 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:55:25,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (117)] Ended with exit code 0 [2022-11-03 01:55:25,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:25,498 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:25,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:25,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1321600673, now seen corresponding path program 1 times [2022-11-03 01:55:25,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:25,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459231178] [2022-11-03 01:55:25,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:25,499 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:25,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:25,500 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:25,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2022-11-03 01:55:25,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:25,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-03 01:55:25,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:32,569 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 88 proven. 121 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:55:32,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 116 proven. 93 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:55:45,191 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:45,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459231178] [2022-11-03 01:55:45,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459231178] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:45,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1221608297] [2022-11-03 01:55:45,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:45,191 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:55:45,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:55:45,192 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:55:45,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (119)] Waiting until timeout for monitored process [2022-11-03 01:55:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:45,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-03 01:55:45,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 88 proven. 121 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:55:48,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 116 proven. 93 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:55:49,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1221608297] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:49,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909311608] [2022-11-03 01:55:49,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:49,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:49,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:55:49,638 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:55:49,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-11-03 01:55:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:50,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-03 01:55:50,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:52,828 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 86 proven. 124 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:55:52,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 117 proven. 93 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:55:54,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909311608] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:54,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:55:54,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38, 38, 39, 39] total 76 [2022-11-03 01:55:54,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044295649] [2022-11-03 01:55:54,663 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:55:54,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-03 01:55:54,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:54,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-03 01:55:54,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=5342, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 01:55:54,664 INFO L87 Difference]: Start difference. First operand 3448 states and 3889 transitions. Second operand has 76 states, 76 states have (on average 3.6842105263157894) internal successors, (280), 76 states have internal predecessors, (280), 0 states have call successors, (0), 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 01:56:28,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:28,216 INFO L93 Difference]: Finished difference Result 3877 states and 4368 transitions. [2022-11-03 01:56:28,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-03 01:56:28,216 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.6842105263157894) internal successors, (280), 76 states have internal predecessors, (280), 0 states have call successors, (0), 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 145 [2022-11-03 01:56:28,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:28,218 INFO L225 Difference]: With dead ends: 3877 [2022-11-03 01:56:28,218 INFO L226 Difference]: Without dead ends: 3875 [2022-11-03 01:56:28,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 963 GetRequests, 789 SyntacticMatches, 9 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6200 ImplicationChecksByTransitivity, 48.5s TimeCoverageRelationStatistics Valid=2090, Invalid=25632, Unknown=0, NotChecked=0, Total=27722 [2022-11-03 01:56:28,220 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 199 mSDsluCounter, 5576 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 5690 SdHoareTripleChecker+Invalid, 2981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2882 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:28,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 5690 Invalid, 2981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 2882 Unchecked, 0.1s Time] [2022-11-03 01:56:28,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3875 states. [2022-11-03 01:56:28,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3875 to 3594. [2022-11-03 01:56:28,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3594 states, 3593 states have (on average 1.1288616754801002) internal successors, (4056), 3593 states have internal predecessors, (4056), 0 states have call successors, (0), 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 01:56:28,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3594 states to 3594 states and 4056 transitions. [2022-11-03 01:56:28,918 INFO L78 Accepts]: Start accepts. Automaton has 3594 states and 4056 transitions. Word has length 145 [2022-11-03 01:56:28,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:28,918 INFO L495 AbstractCegarLoop]: Abstraction has 3594 states and 4056 transitions. [2022-11-03 01:56:28,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.6842105263157894) internal successors, (280), 76 states have internal predecessors, (280), 0 states have call successors, (0), 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 01:56:28,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3594 states and 4056 transitions. [2022-11-03 01:56:28,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 01:56:28,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:28,921 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:28,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (119)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:29,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:29,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (118)] Ended with exit code 0 [2022-11-03 01:56:29,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:56:29,522 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:29,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:29,523 INFO L85 PathProgramCache]: Analyzing trace with hash -620536095, now seen corresponding path program 2 times [2022-11-03 01:56:29,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:56:29,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1746936756] [2022-11-03 01:56:29,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:56:29,524 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:56:29,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:56:29,526 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:56:29,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821b861-d965-48e5-a176-bbb95f96f3f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (121)] Waiting until timeout for monitored process [2022-11-03 01:56:29,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:56:29,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:56:29,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-03 01:56:30,000 INFO L286 TraceCheckSpWp]: Computing forward predicates...