./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/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_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/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_8d1754d0-d39a-4260-aa74-402a55e9011f/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 305e23961ddec06d27a383cd2e2e2d7b49d90c9637b68ea1de5dfcf9243db1b4 --- 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 04:02:30,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:02:30,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:02:30,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:02:30,123 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:02:30,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:02:30,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:02:30,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:02:30,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:02:30,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:02:30,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:02:30,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:02:30,145 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:02:30,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:02:30,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:02:30,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:02:30,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:02:30,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:02:30,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:02:30,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:02:30,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:02:30,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:02:30,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:02:30,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:02:30,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:02:30,184 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:02:30,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:02:30,185 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:02:30,186 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:02:30,187 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:02:30,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:02:30,188 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:02:30,189 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:02:30,190 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:02:30,191 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:02:30,191 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:02:30,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:02:30,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:02:30,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:02:30,201 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:02:30,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:02:30,203 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 04:02:30,246 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:02:30,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:02:30,247 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:02:30,247 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:02:30,251 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:02:30,252 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:02:30,252 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:02:30,252 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:02:30,252 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:02:30,253 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:02:30,254 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:02:30,254 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:02:30,254 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:02:30,254 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:02:30,255 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:02:30,255 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:02:30,255 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:02:30,255 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:02:30,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:02:30,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:02:30,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:02:30,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:02:30,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:02:30,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:02:30,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:02:30,259 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:02:30,260 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:02:30,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:02:30,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:02:30,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:02:30,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:02:30,261 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:02:30,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:02:30,261 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:02:30,262 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:02:30,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:02:30,262 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:02:30,262 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:02:30,262 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_8d1754d0-d39a-4260-aa74-402a55e9011f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 305e23961ddec06d27a383cd2e2e2d7b49d90c9637b68ea1de5dfcf9243db1b4 [2022-11-03 04:02:30,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:02:30,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:02:30,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:02:30,615 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:02:30,616 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:02:30,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v2.c [2022-11-03 04:02:30,708 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/data/2ac910e0d/79cc24ab90dc40bbb6a40a3d4df9af0f/FLAG71090588f [2022-11-03 04:02:31,292 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:02:31,292 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v2.c [2022-11-03 04:02:31,301 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/data/2ac910e0d/79cc24ab90dc40bbb6a40a3d4df9af0f/FLAG71090588f [2022-11-03 04:02:31,633 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/data/2ac910e0d/79cc24ab90dc40bbb6a40a3d4df9af0f [2022-11-03 04:02:31,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:02:31,638 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:02:31,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:02:31,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:02:31,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:02:31,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:02:31" (1/1) ... [2022-11-03 04:02:31,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77932084 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:31, skipping insertion in model container [2022-11-03 04:02:31,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:02:31" (1/1) ... [2022-11-03 04:02:31,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:02:31,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:02:31,928 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_8d1754d0-d39a-4260-aa74-402a55e9011f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v2.c[1107,1120] [2022-11-03 04:02:31,998 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:02:32,002 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:02:32,014 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_8d1754d0-d39a-4260-aa74-402a55e9011f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v2.c[1107,1120] [2022-11-03 04:02:32,056 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:02:32,069 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:02:32,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:32 WrapperNode [2022-11-03 04:02:32,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:02:32,072 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:02:32,072 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:02:32,072 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:02:32,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:32" (1/1) ... [2022-11-03 04:02:32,098 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:32" (1/1) ... [2022-11-03 04:02:32,162 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 286 [2022-11-03 04:02:32,171 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:02:32,172 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:02:32,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:02:32,173 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:02:32,184 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:32" (1/1) ... [2022-11-03 04:02:32,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:32" (1/1) ... [2022-11-03 04:02:32,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:32" (1/1) ... [2022-11-03 04:02:32,212 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:32" (1/1) ... [2022-11-03 04:02:32,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:32" (1/1) ... [2022-11-03 04:02:32,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:32" (1/1) ... [2022-11-03 04:02:32,242 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:32" (1/1) ... [2022-11-03 04:02:32,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:32" (1/1) ... [2022-11-03 04:02:32,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:02:32,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:02:32,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:02:32,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:02:32,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:32" (1/1) ... [2022-11-03 04:02:32,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:02:32,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:32,319 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:02:32,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:02:32,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:02:32,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:02:32,483 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:02:32,485 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:02:33,149 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:02:33,566 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:02:33,567 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 04:02:33,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:02:33 BoogieIcfgContainer [2022-11-03 04:02:33,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:02:33,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:02:33,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:02:33,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:02:33,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:02:31" (1/3) ... [2022-11-03 04:02:33,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73a255c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:02:33, skipping insertion in model container [2022-11-03 04:02:33,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:32" (2/3) ... [2022-11-03 04:02:33,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73a255c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:02:33, skipping insertion in model container [2022-11-03 04:02:33,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:02:33" (3/3) ... [2022-11-03 04:02:33,583 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.eq_sdp_v2.c [2022-11-03 04:02:33,605 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:02:33,606 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:02:33,688 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:02:33,706 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;@65fb1c07, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:02:33,711 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:02:33,716 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 04:02:33,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 04:02:33,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:33,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 04:02:33,728 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:33,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:33,737 INFO L85 PathProgramCache]: Analyzing trace with hash 5163871, now seen corresponding path program 1 times [2022-11-03 04:02:33,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:33,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082576640] [2022-11-03 04:02:33,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:33,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 04:02:34,028 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 04:02:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 04:02:34,124 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 04:02:34,126 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 04:02:34,128 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 04:02:34,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 04:02:34,136 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 04:02:34,141 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 04:02:34,173 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 04:02:34,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 04:02:34 BoogieIcfgContainer [2022-11-03 04:02:34,182 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 04:02:34,184 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 04:02:34,184 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 04:02:34,185 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 04:02:34,186 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:02:33" (3/4) ... [2022-11-03 04:02:34,190 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 04:02:34,191 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 04:02:34,194 INFO L158 Benchmark]: Toolchain (without parser) took 2554.94ms. Allocated memory is still 127.9MB. Free memory was 95.0MB in the beginning and 52.3MB in the end (delta: 42.7MB). Peak memory consumption was 42.2MB. Max. memory is 16.1GB. [2022-11-03 04:02:34,195 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 86.0MB. Free memory was 62.3MB in the beginning and 62.3MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 04:02:34,196 INFO L158 Benchmark]: CACSL2BoogieTranslator took 431.03ms. Allocated memory is still 127.9MB. Free memory was 95.0MB in the beginning and 100.8MB in the end (delta: -5.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 04:02:34,197 INFO L158 Benchmark]: Boogie Procedure Inliner took 99.74ms. Allocated memory is still 127.9MB. Free memory was 100.8MB in the beginning and 96.8MB in the end (delta: 4.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 04:02:34,199 INFO L158 Benchmark]: Boogie Preprocessor took 91.45ms. Allocated memory is still 127.9MB. Free memory was 96.8MB in the beginning and 94.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 04:02:34,205 INFO L158 Benchmark]: RCFGBuilder took 1305.80ms. Allocated memory is still 127.9MB. Free memory was 94.7MB in the beginning and 76.2MB in the end (delta: 18.5MB). Peak memory consumption was 61.9MB. Max. memory is 16.1GB. [2022-11-03 04:02:34,206 INFO L158 Benchmark]: TraceAbstraction took 607.83ms. Allocated memory is still 127.9MB. Free memory was 75.4MB in the beginning and 53.1MB in the end (delta: 22.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-11-03 04:02:34,207 INFO L158 Benchmark]: Witness Printer took 7.75ms. Allocated memory is still 127.9MB. Free memory was 53.1MB in the beginning and 52.3MB in the end (delta: 774.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 04:02:34,218 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 86.0MB. Free memory was 62.3MB in the beginning and 62.3MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 431.03ms. Allocated memory is still 127.9MB. Free memory was 95.0MB in the beginning and 100.8MB in the end (delta: -5.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 99.74ms. Allocated memory is still 127.9MB. Free memory was 100.8MB in the beginning and 96.8MB in the end (delta: 4.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 91.45ms. Allocated memory is still 127.9MB. Free memory was 96.8MB in the beginning and 94.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1305.80ms. Allocated memory is still 127.9MB. Free memory was 94.7MB in the beginning and 76.2MB in the end (delta: 18.5MB). Peak memory consumption was 61.9MB. Max. memory is 16.1GB. * TraceAbstraction took 607.83ms. Allocated memory is still 127.9MB. Free memory was 75.4MB in the beginning and 53.1MB in the end (delta: 22.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Witness Printer took 7.75ms. Allocated memory is still 127.9MB. Free memory was 53.1MB in the beginning and 52.3MB in the end (delta: 774.3kB). Peak memory consumption was 2.1MB. 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 94, overapproximation of bitwiseAnd at line 83. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_1 var_9 = 0; [L29] const SORT_1 var_17 = 1; [L31] SORT_1 input_2; [L32] SORT_1 input_3; [L33] SORT_1 input_4; [L34] SORT_1 input_5; [L35] SORT_1 input_6; [L36] SORT_1 input_7; [L37] SORT_1 input_8; [L39] SORT_1 state_10 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L40] SORT_1 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L41] SORT_1 state_21 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L42] SORT_1 state_23 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L43] SORT_1 state_25 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L44] SORT_1 state_27 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L45] SORT_1 state_29 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L46] SORT_1 state_31 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L47] SORT_1 state_33 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L48] SORT_1 state_35 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L49] SORT_1 state_38 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L50] SORT_1 state_40 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L52] SORT_1 init_11_arg_1 = var_9; [L53] state_10 = init_11_arg_1 [L54] SORT_1 init_13_arg_1 = var_9; [L55] state_12 = init_13_arg_1 [L56] SORT_1 init_22_arg_1 = var_9; [L57] state_21 = init_22_arg_1 [L58] SORT_1 init_24_arg_1 = var_9; [L59] state_23 = init_24_arg_1 [L60] SORT_1 init_26_arg_1 = var_9; [L61] state_25 = init_26_arg_1 [L62] SORT_1 init_28_arg_1 = var_9; [L63] state_27 = init_28_arg_1 [L64] SORT_1 init_30_arg_1 = var_9; [L65] state_29 = init_30_arg_1 [L66] SORT_1 init_32_arg_1 = var_9; [L67] state_31 = init_32_arg_1 [L68] SORT_1 init_34_arg_1 = var_9; [L69] state_33 = init_34_arg_1 [L70] SORT_1 init_36_arg_1 = var_9; [L71] state_35 = init_36_arg_1 [L72] SORT_1 init_39_arg_1 = var_9; [L73] state_38 = init_39_arg_1 [L74] SORT_1 init_41_arg_1 = var_9; [L75] state_40 = init_41_arg_1 VAL [init_11_arg_1=0, init_13_arg_1=0, init_22_arg_1=0, init_24_arg_1=0, init_26_arg_1=0, init_28_arg_1=0, init_30_arg_1=0, init_32_arg_1=0, init_34_arg_1=0, init_36_arg_1=0, init_39_arg_1=0, init_41_arg_1=0, mask_SORT_1=1, msb_SORT_1=1, state_10=0, state_12=0, state_21=0, state_23=0, state_25=0, state_27=0, state_29=0, state_31=0, state_33=0, state_35=0, state_38=0, state_40=0, var_17=1, var_9=0] [L78] input_2 = __VERIFIER_nondet_uchar() [L79] input_3 = __VERIFIER_nondet_uchar() [L80] input_4 = __VERIFIER_nondet_uchar() [L81] input_5 = __VERIFIER_nondet_uchar() [L82] input_6 = __VERIFIER_nondet_uchar() [L83] input_6 = input_6 & mask_SORT_1 [L84] input_7 = __VERIFIER_nondet_uchar() [L85] input_7 = input_7 & mask_SORT_1 [L86] input_8 = __VERIFIER_nondet_uchar() [L87] input_8 = input_8 & mask_SORT_1 [L90] SORT_1 var_14_arg_0 = state_10; [L91] SORT_1 var_14_arg_1 = state_12; [L92] SORT_1 var_14 = var_14_arg_0 == var_14_arg_1; [L93] SORT_1 var_18_arg_0 = var_14; [L94] SORT_1 var_18 = ~var_18_arg_0; [L95] SORT_1 var_19_arg_0 = var_17; [L96] SORT_1 var_19_arg_1 = var_18; [L97] SORT_1 var_19 = var_19_arg_0 & var_19_arg_1; [L98] var_19 = var_19 & mask_SORT_1 [L99] SORT_1 bad_20_arg_0 = var_19; [L100] CALL __VERIFIER_assert(!(bad_20_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: 0.5s, 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 04:02:34,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/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_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/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_8d1754d0-d39a-4260-aa74-402a55e9011f/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 305e23961ddec06d27a383cd2e2e2d7b49d90c9637b68ea1de5dfcf9243db1b4 --- 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 04:02:37,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:02:37,023 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:02:37,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:02:37,078 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:02:37,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:02:37,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:02:37,091 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:02:37,098 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:02:37,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:02:37,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:02:37,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:02:37,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:02:37,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:02:37,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:02:37,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:02:37,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:02:37,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:02:37,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:02:37,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:02:37,133 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:02:37,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:02:37,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:02:37,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:02:37,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:02:37,153 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:02:37,153 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:02:37,155 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:02:37,156 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:02:37,158 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:02:37,158 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:02:37,159 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:02:37,162 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:02:37,163 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:02:37,164 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:02:37,164 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:02:37,166 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:02:37,166 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:02:37,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:02:37,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:02:37,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:02:37,170 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 04:02:37,229 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:02:37,229 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:02:37,230 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:02:37,230 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:02:37,232 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:02:37,232 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:02:37,232 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:02:37,232 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:02:37,233 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:02:37,233 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:02:37,234 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:02:37,234 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:02:37,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:02:37,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:02:37,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:02:37,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:02:37,237 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:02:37,237 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 04:02:37,238 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 04:02:37,238 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 04:02:37,238 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:02:37,238 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:02:37,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:02:37,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:02:37,239 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 04:02:37,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:02:37,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:02:37,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:02:37,240 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:02:37,240 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:02:37,240 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 04:02:37,241 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:37,241 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:02:37,242 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:02:37,242 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 04:02:37,242 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_8d1754d0-d39a-4260-aa74-402a55e9011f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 305e23961ddec06d27a383cd2e2e2d7b49d90c9637b68ea1de5dfcf9243db1b4 [2022-11-03 04:02:37,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:02:37,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:02:37,756 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:02:37,757 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:02:37,758 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:02:37,760 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v2.c [2022-11-03 04:02:37,845 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/data/bdbc28bdc/42a4e0df94764c4fb3de7d48cae5d798/FLAGe52b93107 [2022-11-03 04:02:38,453 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:02:38,456 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v2.c [2022-11-03 04:02:38,471 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/data/bdbc28bdc/42a4e0df94764c4fb3de7d48cae5d798/FLAGe52b93107 [2022-11-03 04:02:38,762 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/data/bdbc28bdc/42a4e0df94764c4fb3de7d48cae5d798 [2022-11-03 04:02:38,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:02:38,769 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:02:38,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:02:38,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:02:38,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:02:38,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:02:38" (1/1) ... [2022-11-03 04:02:38,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e9c6bcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:38, skipping insertion in model container [2022-11-03 04:02:38,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:02:38" (1/1) ... [2022-11-03 04:02:38,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:02:38,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:02:39,023 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_8d1754d0-d39a-4260-aa74-402a55e9011f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v2.c[1107,1120] [2022-11-03 04:02:39,148 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:02:39,152 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:02:39,164 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_8d1754d0-d39a-4260-aa74-402a55e9011f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v2.c[1107,1120] [2022-11-03 04:02:39,201 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:02:39,215 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:02:39,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:39 WrapperNode [2022-11-03 04:02:39,216 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:02:39,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:02:39,217 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:02:39,217 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:02:39,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:39" (1/1) ... [2022-11-03 04:02:39,236 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:39" (1/1) ... [2022-11-03 04:02:39,270 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 286 [2022-11-03 04:02:39,270 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:02:39,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:02:39,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:02:39,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:02:39,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:39" (1/1) ... [2022-11-03 04:02:39,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:39" (1/1) ... [2022-11-03 04:02:39,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:39" (1/1) ... [2022-11-03 04:02:39,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:39" (1/1) ... [2022-11-03 04:02:39,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:39" (1/1) ... [2022-11-03 04:02:39,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:39" (1/1) ... [2022-11-03 04:02:39,318 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:39" (1/1) ... [2022-11-03 04:02:39,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:39" (1/1) ... [2022-11-03 04:02:39,323 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:02:39,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:02:39,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:02:39,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:02:39,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:39" (1/1) ... [2022-11-03 04:02:39,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:02:39,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:39,385 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:02:39,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:02:39,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:02:39,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:02:39,617 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:02:39,619 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:02:40,169 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:02:40,178 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:02:40,178 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 04:02:40,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:02:40 BoogieIcfgContainer [2022-11-03 04:02:40,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:02:40,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:02:40,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:02:40,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:02:40,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:02:38" (1/3) ... [2022-11-03 04:02:40,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23124053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:02:40, skipping insertion in model container [2022-11-03 04:02:40,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:39" (2/3) ... [2022-11-03 04:02:40,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23124053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:02:40, skipping insertion in model container [2022-11-03 04:02:40,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:02:40" (3/3) ... [2022-11-03 04:02:40,191 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.eq_sdp_v2.c [2022-11-03 04:02:40,213 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:02:40,213 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:02:40,270 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:02:40,278 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;@3386fc96, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:02:40,278 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:02:40,283 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 04:02:40,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 04:02:40,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:40,292 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 04:02:40,293 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:40,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:40,299 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 04:02:40,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:40,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1224707546] [2022-11-03 04:02:40,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:40,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:40,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:40,320 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:40,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 04:02:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:40,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 04:02:40,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:40,798 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 04:02:40,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:40,800 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:40,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1224707546] [2022-11-03 04:02:40,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1224707546] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:40,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:40,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:02:40,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103320780] [2022-11-03 04:02:40,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:40,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:02:40,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:40,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:02:40,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:02:40,854 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 04:02:41,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:41,007 INFO L93 Difference]: Finished difference Result 116 states and 174 transitions. [2022-11-03 04:02:41,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:02:41,015 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 04:02:41,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:41,028 INFO L225 Difference]: With dead ends: 116 [2022-11-03 04:02:41,029 INFO L226 Difference]: Without dead ends: 75 [2022-11-03 04:02:41,033 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 04:02:41,040 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 100 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:41,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 150 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:02:41,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-03 04:02:41,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 41. [2022-11-03 04:02:41,095 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 04:02:41,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 57 transitions. [2022-11-03 04:02:41,100 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 57 transitions. Word has length 5 [2022-11-03 04:02:41,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:41,101 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 57 transitions. [2022-11-03 04:02:41,101 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 04:02:41,101 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 57 transitions. [2022-11-03 04:02:41,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 04:02:41,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:41,103 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 04:02:41,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-03 04:02:41,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:41,317 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:41,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:41,318 INFO L85 PathProgramCache]: Analyzing trace with hash 547600807, now seen corresponding path program 1 times [2022-11-03 04:02:41,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:41,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [908651880] [2022-11-03 04:02:41,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:41,322 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:41,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:41,323 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:41,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 04:02:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:41,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:02:41,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:41,734 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 04:02:41,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:41,735 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:41,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [908651880] [2022-11-03 04:02:41,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [908651880] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:41,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:41,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:02:41,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330348025] [2022-11-03 04:02:41,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:41,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:02:41,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:41,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:02:41,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:02:41,739 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 04:02:41,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:41,919 INFO L93 Difference]: Finished difference Result 132 states and 188 transitions. [2022-11-03 04:02:41,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 04:02:41,920 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 04:02:41,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:41,921 INFO L225 Difference]: With dead ends: 132 [2022-11-03 04:02:41,921 INFO L226 Difference]: Without dead ends: 95 [2022-11-03 04:02:41,922 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 04:02:41,923 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 179 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:41,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 331 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-11-03 04:02:41,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-03 04:02:41,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 59. [2022-11-03 04:02:41,932 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 04:02:41,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 83 transitions. [2022-11-03 04:02:41,933 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 83 transitions. Word has length 40 [2022-11-03 04:02:41,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:41,934 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 83 transitions. [2022-11-03 04:02:41,934 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 04:02:41,934 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 83 transitions. [2022-11-03 04:02:41,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 04:02:41,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:41,936 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 04:02:41,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:42,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:42,157 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:42,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:42,158 INFO L85 PathProgramCache]: Analyzing trace with hash -2058422747, now seen corresponding path program 1 times [2022-11-03 04:02:42,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:42,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1985768871] [2022-11-03 04:02:42,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:42,159 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:42,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:42,161 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:42,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 04:02:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:42,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:02:42,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:42,394 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 04:02:42,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:42,395 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:42,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1985768871] [2022-11-03 04:02:42,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1985768871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:42,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:42,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:02:42,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855645623] [2022-11-03 04:02:42,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:42,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:02:42,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:42,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:02:42,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:02:42,399 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 04:02:42,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:42,430 INFO L93 Difference]: Finished difference Result 163 states and 233 transitions. [2022-11-03 04:02:42,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:02:42,431 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 04:02:42,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:42,432 INFO L225 Difference]: With dead ends: 163 [2022-11-03 04:02:42,433 INFO L226 Difference]: Without dead ends: 126 [2022-11-03 04:02:42,433 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 04:02:42,435 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 04:02:42,435 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 04:02:42,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-03 04:02:42,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 79. [2022-11-03 04:02:42,444 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 04:02:42,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 112 transitions. [2022-11-03 04:02:42,446 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 112 transitions. Word has length 40 [2022-11-03 04:02:42,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:42,446 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 112 transitions. [2022-11-03 04:02:42,447 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 04:02:42,447 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 112 transitions. [2022-11-03 04:02:42,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 04:02:42,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:42,448 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 04:02:42,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:42,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:42,672 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:42,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:42,673 INFO L85 PathProgramCache]: Analyzing trace with hash 956680871, now seen corresponding path program 1 times [2022-11-03 04:02:42,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:42,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710576789] [2022-11-03 04:02:42,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:42,675 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:42,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:42,684 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:42,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 04:02:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:42,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 04:02:42,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:43,346 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 04:02:43,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:44,612 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 04:02:44,612 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:44,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710576789] [2022-11-03 04:02:44,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710576789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:44,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [873874162] [2022-11-03 04:02:44,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:44,613 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:44,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:44,616 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:44,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-03 04:02:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:44,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 04:02:44,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:45,174 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 04:02:45,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:45,661 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 04:02:45,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [873874162] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:45,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578539669] [2022-11-03 04:02:45,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:45,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:45,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:45,672 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:45,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 04:02:45,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:45,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 04:02:45,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:46,143 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 04:02:46,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:46,661 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 04:02:46,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578539669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:46,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:02:46,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 12, 12] total 22 [2022-11-03 04:02:46,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426958036] [2022-11-03 04:02:46,662 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:02:46,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 04:02:46,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:46,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 04:02:46,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-11-03 04:02:46,670 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 04:02:48,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:48,434 INFO L93 Difference]: Finished difference Result 214 states and 306 transitions. [2022-11-03 04:02:48,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 04:02:48,435 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 04:02:48,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:48,436 INFO L225 Difference]: With dead ends: 214 [2022-11-03 04:02:48,437 INFO L226 Difference]: Without dead ends: 212 [2022-11-03 04:02:48,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 217 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=384, Invalid=1686, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 04:02:48,439 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 475 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:48,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 706 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 123 Invalid, 0 Unknown, 212 Unchecked, 0.2s Time] [2022-11-03 04:02:48,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-11-03 04:02:48,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 130. [2022-11-03 04:02:48,451 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 04:02:48,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 185 transitions. [2022-11-03 04:02:48,453 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 185 transitions. Word has length 40 [2022-11-03 04:02:48,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:48,454 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 185 transitions. [2022-11-03 04:02:48,454 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 04:02:48,454 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 185 transitions. [2022-11-03 04:02:48,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 04:02:48,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:48,456 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 04:02:48,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:48,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:48,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:49,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:49,071 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:49,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:49,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1658280745, now seen corresponding path program 1 times [2022-11-03 04:02:49,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:49,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1817520870] [2022-11-03 04:02:49,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:49,073 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:49,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:49,074 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:49,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 04:02:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:49,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:02:49,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:49,347 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 04:02:49,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:49,348 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:49,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1817520870] [2022-11-03 04:02:49,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1817520870] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:49,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:49,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:02:49,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317628945] [2022-11-03 04:02:49,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:49,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:02:49,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:49,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:02:49,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:02:49,351 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 04:02:49,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:49,494 INFO L93 Difference]: Finished difference Result 192 states and 272 transitions. [2022-11-03 04:02:49,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 04:02:49,495 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 04:02:49,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:49,495 INFO L225 Difference]: With dead ends: 192 [2022-11-03 04:02:49,496 INFO L226 Difference]: Without dead ends: 139 [2022-11-03 04:02:49,496 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 04:02:49,497 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 179 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:49,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 273 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-11-03 04:02:49,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-03 04:02:49,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 118. [2022-11-03 04:02:49,509 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 04:02:49,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 167 transitions. [2022-11-03 04:02:49,510 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 167 transitions. Word has length 40 [2022-11-03 04:02:49,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:49,511 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 167 transitions. [2022-11-03 04:02:49,511 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 04:02:49,511 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 167 transitions. [2022-11-03 04:02:49,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 04:02:49,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:49,513 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 04:02:49,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-11-03 04:02:49,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:49,728 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:49,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:49,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1576268373, now seen corresponding path program 1 times [2022-11-03 04:02:49,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:49,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123232094] [2022-11-03 04:02:49,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:49,730 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:49,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:49,732 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:49,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 04:02:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:49,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:02:49,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:49,989 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 04:02:49,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:49,990 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:49,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123232094] [2022-11-03 04:02:49,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123232094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:49,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:49,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:02:49,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944653075] [2022-11-03 04:02:49,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:49,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:02:49,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:49,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:02:49,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:02:49,993 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 04:02:50,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:50,091 INFO L93 Difference]: Finished difference Result 219 states and 309 transitions. [2022-11-03 04:02:50,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:02:50,092 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 04:02:50,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:50,092 INFO L225 Difference]: With dead ends: 219 [2022-11-03 04:02:50,093 INFO L226 Difference]: Without dead ends: 166 [2022-11-03 04:02:50,093 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 04:02:50,094 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 136 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:50,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 469 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-03 04:02:50,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-03 04:02:50,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 118. [2022-11-03 04:02:50,102 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 04:02:50,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 166 transitions. [2022-11-03 04:02:50,104 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 166 transitions. Word has length 40 [2022-11-03 04:02:50,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:50,104 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 166 transitions. [2022-11-03 04:02:50,105 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 04:02:50,105 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 166 transitions. [2022-11-03 04:02:50,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 04:02:50,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:50,106 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 04:02:50,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:50,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:50,321 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:50,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:50,321 INFO L85 PathProgramCache]: Analyzing trace with hash -874668499, now seen corresponding path program 1 times [2022-11-03 04:02:50,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:50,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [597985564] [2022-11-03 04:02:50,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:50,322 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:50,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:50,324 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:50,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 04:02:50,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:50,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:02:50,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:50,607 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 04:02:50,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:50,607 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:50,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [597985564] [2022-11-03 04:02:50,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [597985564] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:50,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:50,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:02:50,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004416481] [2022-11-03 04:02:50,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:50,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:02:50,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:50,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:02:50,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:02:50,611 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 04:02:50,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:50,723 INFO L93 Difference]: Finished difference Result 257 states and 361 transitions. [2022-11-03 04:02:50,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:02:50,724 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 04:02:50,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:50,725 INFO L225 Difference]: With dead ends: 257 [2022-11-03 04:02:50,725 INFO L226 Difference]: Without dead ends: 206 [2022-11-03 04:02:50,726 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 04:02:50,727 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 89 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:50,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 706 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-11-03 04:02:50,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-03 04:02:50,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 118. [2022-11-03 04:02:50,736 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 04:02:50,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 165 transitions. [2022-11-03 04:02:50,738 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 165 transitions. Word has length 40 [2022-11-03 04:02:50,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:50,738 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 165 transitions. [2022-11-03 04:02:50,738 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 04:02:50,739 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 165 transitions. [2022-11-03 04:02:50,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 04:02:50,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:50,740 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 04:02:50,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:50,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:50,957 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:50,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:50,957 INFO L85 PathProgramCache]: Analyzing trace with hash 511534895, now seen corresponding path program 1 times [2022-11-03 04:02:50,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:50,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363056614] [2022-11-03 04:02:50,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:50,959 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:50,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:50,960 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:50,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 04:02:51,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:51,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:02:51,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:51,242 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 04:02:51,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:51,242 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:51,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363056614] [2022-11-03 04:02:51,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363056614] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:51,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:51,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:02:51,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34344344] [2022-11-03 04:02:51,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:51,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:02:51,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:51,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:02:51,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:02:51,245 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 04:02:51,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:51,345 INFO L93 Difference]: Finished difference Result 245 states and 344 transitions. [2022-11-03 04:02:51,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:02:51,346 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 04:02:51,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:51,349 INFO L225 Difference]: With dead ends: 245 [2022-11-03 04:02:51,349 INFO L226 Difference]: Without dead ends: 196 [2022-11-03 04:02:51,349 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 04:02:51,351 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 119 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:51,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 541 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 55 Unchecked, 0.0s Time] [2022-11-03 04:02:51,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-03 04:02:51,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 118. [2022-11-03 04:02:51,360 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 04:02:51,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 164 transitions. [2022-11-03 04:02:51,361 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 164 transitions. Word has length 40 [2022-11-03 04:02:51,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:51,363 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 164 transitions. [2022-11-03 04:02:51,363 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 04:02:51,364 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 164 transitions. [2022-11-03 04:02:51,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 04:02:51,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:51,372 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 04:02:51,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:51,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:51,585 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:51,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:51,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1860204367, now seen corresponding path program 1 times [2022-11-03 04:02:51,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:51,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636234428] [2022-11-03 04:02:51,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:51,587 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:51,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:51,588 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:51,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 04:02:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:51,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:02:51,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:51,878 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 04:02:51,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:51,878 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:51,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636234428] [2022-11-03 04:02:51,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [636234428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:51,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:51,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:02:51,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388204891] [2022-11-03 04:02:51,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:51,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:02:51,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:51,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:02:51,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:02:51,880 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 04:02:51,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:51,986 INFO L93 Difference]: Finished difference Result 241 states and 335 transitions. [2022-11-03 04:02:51,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:02:51,987 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 04:02:51,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:51,989 INFO L225 Difference]: With dead ends: 241 [2022-11-03 04:02:51,989 INFO L226 Difference]: Without dead ends: 194 [2022-11-03 04:02:51,989 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 04:02:51,992 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 77 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:51,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 556 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-03 04:02:51,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-03 04:02:51,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 118. [2022-11-03 04:02:51,999 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 04:02:52,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 163 transitions. [2022-11-03 04:02:52,000 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 163 transitions. Word has length 40 [2022-11-03 04:02:52,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:52,003 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 163 transitions. [2022-11-03 04:02:52,004 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 04:02:52,004 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 163 transitions. [2022-11-03 04:02:52,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 04:02:52,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:52,008 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 04:02:52,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:52,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:52,222 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:52,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:52,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1719655757, now seen corresponding path program 1 times [2022-11-03 04:02:52,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:52,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389242459] [2022-11-03 04:02:52,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:52,223 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:52,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:52,224 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:52,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 04:02:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:52,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:02:52,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:52,512 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 04:02:52,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:52,513 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:52,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389242459] [2022-11-03 04:02:52,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389242459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:52,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:52,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:02:52,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375959649] [2022-11-03 04:02:52,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:52,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:02:52,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:52,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:02:52,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:02:52,515 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 04:02:52,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:52,616 INFO L93 Difference]: Finished difference Result 233 states and 322 transitions. [2022-11-03 04:02:52,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:02:52,617 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 04:02:52,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:52,618 INFO L225 Difference]: With dead ends: 233 [2022-11-03 04:02:52,619 INFO L226 Difference]: Without dead ends: 188 [2022-11-03 04:02:52,619 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 04:02:52,620 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 71 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:52,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 539 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-03 04:02:52,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-03 04:02:52,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 118. [2022-11-03 04:02:52,626 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 04:02:52,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 162 transitions. [2022-11-03 04:02:52,627 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 162 transitions. Word has length 40 [2022-11-03 04:02:52,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:52,628 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 162 transitions. [2022-11-03 04:02:52,628 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 04:02:52,628 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 162 transitions. [2022-11-03 04:02:52,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 04:02:52,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:52,629 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 04:02:52,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:52,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:52,848 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:52,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:52,849 INFO L85 PathProgramCache]: Analyzing trace with hash 769873205, now seen corresponding path program 1 times [2022-11-03 04:02:52,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:52,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578950645] [2022-11-03 04:02:52,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:52,849 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:52,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:52,850 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:52,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 04:02:52,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:52,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:02:52,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:53,147 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 04:02:53,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:53,147 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:53,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578950645] [2022-11-03 04:02:53,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578950645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:53,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:53,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:02:53,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64072180] [2022-11-03 04:02:53,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:53,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:02:53,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:53,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:02:53,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:02:53,149 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 04:02:53,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:53,254 INFO L93 Difference]: Finished difference Result 225 states and 309 transitions. [2022-11-03 04:02:53,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:02:53,255 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 04:02:53,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:53,256 INFO L225 Difference]: With dead ends: 225 [2022-11-03 04:02:53,256 INFO L226 Difference]: Without dead ends: 182 [2022-11-03 04:02:53,257 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 04:02:53,258 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 65 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:53,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 523 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-03 04:02:53,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-03 04:02:53,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 118. [2022-11-03 04:02:53,264 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 04:02:53,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 161 transitions. [2022-11-03 04:02:53,264 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 161 transitions. Word has length 40 [2022-11-03 04:02:53,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:53,265 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 161 transitions. [2022-11-03 04:02:53,265 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 04:02:53,265 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 161 transitions. [2022-11-03 04:02:53,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 04:02:53,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:53,266 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 04:02:53,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:53,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:53,468 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:53,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:53,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1192575031, now seen corresponding path program 1 times [2022-11-03 04:02:53,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:53,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [124087502] [2022-11-03 04:02:53,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:53,470 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:53,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:53,471 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:53,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 04:02:53,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:53,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:02:53,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:53,748 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 04:02:53,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:53,748 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:53,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [124087502] [2022-11-03 04:02:53,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [124087502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:53,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:53,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:02:53,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719923300] [2022-11-03 04:02:53,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:53,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:02:53,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:53,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:02:53,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:02:53,750 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 04:02:53,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:53,846 INFO L93 Difference]: Finished difference Result 209 states and 285 transitions. [2022-11-03 04:02:53,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:02:53,847 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 04:02:53,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:53,848 INFO L225 Difference]: With dead ends: 209 [2022-11-03 04:02:53,848 INFO L226 Difference]: Without dead ends: 170 [2022-11-03 04:02:53,848 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 04:02:53,849 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 53 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 403 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 04:02:53,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 403 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-11-03 04:02:53,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-03 04:02:53,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 118. [2022-11-03 04:02:53,855 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 04:02:53,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 160 transitions. [2022-11-03 04:02:53,856 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 160 transitions. Word has length 40 [2022-11-03 04:02:53,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:53,856 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 160 transitions. [2022-11-03 04:02:53,856 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 04:02:53,856 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 160 transitions. [2022-11-03 04:02:53,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 04:02:53,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:53,857 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 04:02:53,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:54,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:54,071 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:54,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:54,071 INFO L85 PathProgramCache]: Analyzing trace with hash -395772871, now seen corresponding path program 1 times [2022-11-03 04:02:54,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:54,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859777758] [2022-11-03 04:02:54,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:54,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:54,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:54,074 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:54,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 04:02:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:54,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:02:54,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:54,357 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 04:02:54,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:54,357 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:54,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859777758] [2022-11-03 04:02:54,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859777758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:54,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:54,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:02:54,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879110490] [2022-11-03 04:02:54,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:54,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:02:54,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:54,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:02:54,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:02:54,359 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 04:02:54,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:54,461 INFO L93 Difference]: Finished difference Result 197 states and 268 transitions. [2022-11-03 04:02:54,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:02:54,462 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 04:02:54,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:54,463 INFO L225 Difference]: With dead ends: 197 [2022-11-03 04:02:54,464 INFO L226 Difference]: Without dead ends: 160 [2022-11-03 04:02:54,464 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 04:02:54,465 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 42 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:54,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 555 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-03 04:02:54,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-03 04:02:54,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 120. [2022-11-03 04:02:54,471 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 04:02:54,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 162 transitions. [2022-11-03 04:02:54,472 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 162 transitions. Word has length 40 [2022-11-03 04:02:54,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:54,472 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 162 transitions. [2022-11-03 04:02:54,473 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 04:02:54,473 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 162 transitions. [2022-11-03 04:02:54,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 04:02:54,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:54,474 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 04:02:54,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:54,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:54,688 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:54,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:54,688 INFO L85 PathProgramCache]: Analyzing trace with hash -982578885, now seen corresponding path program 1 times [2022-11-03 04:02:54,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:54,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627969855] [2022-11-03 04:02:54,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:54,689 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:54,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:54,691 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:54,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 04:02:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:54,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:54,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:54,879 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 04:02:54,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:54,879 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:54,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627969855] [2022-11-03 04:02:54,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627969855] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:54,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:54,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:02:54,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862100141] [2022-11-03 04:02:54,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:54,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:54,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:54,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:54,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:02:54,881 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 04:02:54,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:54,955 INFO L93 Difference]: Finished difference Result 290 states and 406 transitions. [2022-11-03 04:02:54,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:02:54,956 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 04:02:54,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:54,958 INFO L225 Difference]: With dead ends: 290 [2022-11-03 04:02:54,958 INFO L226 Difference]: Without dead ends: 253 [2022-11-03 04:02:54,958 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 04:02:54,959 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 04:02:54,960 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 04:02:54,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-03 04:02:54,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 148. [2022-11-03 04:02:54,966 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 04:02:54,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 203 transitions. [2022-11-03 04:02:54,967 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 203 transitions. Word has length 40 [2022-11-03 04:02:54,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:54,968 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 203 transitions. [2022-11-03 04:02:54,968 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 04:02:54,968 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 203 transitions. [2022-11-03 04:02:54,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 04:02:54,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:54,969 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 04:02:54,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:55,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:55,183 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:55,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:55,184 INFO L85 PathProgramCache]: Analyzing trace with hash 792428477, now seen corresponding path program 1 times [2022-11-03 04:02:55,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:55,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914319889] [2022-11-03 04:02:55,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:55,184 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:55,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:55,186 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:55,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 04:02:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:55,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:55,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:55,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:55,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:55,380 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:55,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914319889] [2022-11-03 04:02:55,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914319889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:55,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:55,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:02:55,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570297180] [2022-11-03 04:02:55,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:55,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:55,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:55,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:55,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:02:55,383 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 04:02:55,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:55,452 INFO L93 Difference]: Finished difference Result 320 states and 448 transitions. [2022-11-03 04:02:55,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:02:55,453 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 04:02:55,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:55,454 INFO L225 Difference]: With dead ends: 320 [2022-11-03 04:02:55,454 INFO L226 Difference]: Without dead ends: 255 [2022-11-03 04:02:55,455 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 04:02:55,456 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 04:02:55,456 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 04:02:55,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-03 04:02:55,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 150. [2022-11-03 04:02:55,463 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 04:02:55,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 205 transitions. [2022-11-03 04:02:55,464 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 205 transitions. Word has length 40 [2022-11-03 04:02:55,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:55,465 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 205 transitions. [2022-11-03 04:02:55,465 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 04:02:55,465 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 205 transitions. [2022-11-03 04:02:55,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 04:02:55,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:55,466 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 04:02:55,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:55,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:55,680 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:55,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:55,680 INFO L85 PathProgramCache]: Analyzing trace with hash 794275519, now seen corresponding path program 1 times [2022-11-03 04:02:55,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:55,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807652639] [2022-11-03 04:02:55,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:55,681 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:55,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:55,682 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:55,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 04:02:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:55,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 04:02:55,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:56,257 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 04:02:56,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:57,530 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 04:02:57,530 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:57,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807652639] [2022-11-03 04:02:57,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807652639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:57,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1675326193] [2022-11-03 04:02:57,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:57,531 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:57,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:57,536 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:57,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-03 04:02:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:57,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 04:02:57,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:58,029 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 04:02:58,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:58,437 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 04:02:58,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1675326193] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:58,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844570077] [2022-11-03 04:02:58,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:58,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:58,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:58,442 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:58,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 04:02:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:58,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 04:02:58,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:58,871 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 04:02:58,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:59,352 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 04:02:59,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844570077] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:59,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:02:59,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 13, 13] total 24 [2022-11-03 04:02:59,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144137873] [2022-11-03 04:02:59,353 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:02:59,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 04:02:59,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:59,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 04:02:59,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-11-03 04:02:59,355 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 04:03:00,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:00,182 INFO L93 Difference]: Finished difference Result 276 states and 371 transitions. [2022-11-03 04:03:00,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 04:03:00,182 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 04:03:00,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:00,184 INFO L225 Difference]: With dead ends: 276 [2022-11-03 04:03:00,184 INFO L226 Difference]: Without dead ends: 274 [2022-11-03 04:03:00,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 210 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 04:03:00,185 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 577 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:00,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 1254 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 167 Invalid, 0 Unknown, 191 Unchecked, 0.2s Time] [2022-11-03 04:03:00,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-11-03 04:03:00,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 181. [2022-11-03 04:03:00,195 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 04:03:00,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 239 transitions. [2022-11-03 04:03:00,196 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 239 transitions. Word has length 40 [2022-11-03 04:03:00,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:00,196 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 239 transitions. [2022-11-03 04:03:00,196 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 04:03:00,197 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 239 transitions. [2022-11-03 04:03:00,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 04:03:00,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:00,198 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 04:03:00,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:00,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:00,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:00,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:00,818 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:00,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:00,819 INFO L85 PathProgramCache]: Analyzing trace with hash 866662077, now seen corresponding path program 1 times [2022-11-03 04:03:00,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:00,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441173974] [2022-11-03 04:03:00,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:00,819 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:00,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:00,820 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:00,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 04:03:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:00,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:03:00,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:00,950 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 04:03:00,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:03:00,950 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:00,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441173974] [2022-11-03 04:03:00,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441173974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:03:00,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:03:00,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:03:00,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271354345] [2022-11-03 04:03:00,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:00,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:03:00,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:00,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:03:00,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:03:00,953 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 04:03:00,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:00,982 INFO L93 Difference]: Finished difference Result 411 states and 567 transitions. [2022-11-03 04:03:00,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:03:00,983 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 04:03:00,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:00,984 INFO L225 Difference]: With dead ends: 411 [2022-11-03 04:03:00,984 INFO L226 Difference]: Without dead ends: 271 [2022-11-03 04:03:00,985 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 04:03:00,986 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 04:03:00,986 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 04:03:00,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-11-03 04:03:00,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 161. [2022-11-03 04:03:00,994 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 04:03:00,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 216 transitions. [2022-11-03 04:03:00,995 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 216 transitions. Word has length 40 [2022-11-03 04:03:00,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:00,996 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 216 transitions. [2022-11-03 04:03:00,996 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 04:03:00,996 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 216 transitions. [2022-11-03 04:03:00,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 04:03:00,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:00,997 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 04:03:01,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:01,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:01,210 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:01,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:01,211 INFO L85 PathProgramCache]: Analyzing trace with hash -2014133429, now seen corresponding path program 1 times [2022-11-03 04:03:01,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:01,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2811290] [2022-11-03 04:03:01,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:01,212 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:01,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:01,213 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:01,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 04:03:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:01,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:03:01,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:01,640 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 04:03:01,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:01,706 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 04:03:01,706 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:01,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2811290] [2022-11-03 04:03:01,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2811290] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:03:01,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:03:01,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-03 04:03:01,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117391626] [2022-11-03 04:03:01,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:01,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:03:01,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:01,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:03:01,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:03:01,709 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 04:03:01,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:01,900 INFO L93 Difference]: Finished difference Result 276 states and 375 transitions. [2022-11-03 04:03:01,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 04:03:01,901 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 04:03:01,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:01,902 INFO L225 Difference]: With dead ends: 276 [2022-11-03 04:03:01,902 INFO L226 Difference]: Without dead ends: 209 [2022-11-03 04:03:01,903 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 04:03:01,903 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 04:03:01,904 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 04:03:01,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-11-03 04:03:01,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 161. [2022-11-03 04:03:01,914 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 04:03:01,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 214 transitions. [2022-11-03 04:03:01,915 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 214 transitions. Word has length 75 [2022-11-03 04:03:01,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:01,916 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 214 transitions. [2022-11-03 04:03:01,916 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 04:03:01,916 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 214 transitions. [2022-11-03 04:03:01,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 04:03:01,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:01,917 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 04:03:01,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-11-03 04:03:02,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:02,131 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:02,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:02,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1782884401, now seen corresponding path program 1 times [2022-11-03 04:03:02,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:02,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398061377] [2022-11-03 04:03:02,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:02,132 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:02,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:02,133 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:02,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 04:03:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:02,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:03:02,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:02,515 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 04:03:02,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:02,554 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 04:03:02,555 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:02,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398061377] [2022-11-03 04:03:02,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398061377] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:03:02,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:03:02,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 04:03:02,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482709983] [2022-11-03 04:03:02,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:02,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:03:02,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:02,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:03:02,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:03:02,557 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 04:03:02,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:02,705 INFO L93 Difference]: Finished difference Result 241 states and 325 transitions. [2022-11-03 04:03:02,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:03:02,706 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 04:03:02,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:02,707 INFO L225 Difference]: With dead ends: 241 [2022-11-03 04:03:02,707 INFO L226 Difference]: Without dead ends: 174 [2022-11-03 04:03:02,708 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 04:03:02,708 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 04:03:02,709 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 04:03:02,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-03 04:03:02,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 161. [2022-11-03 04:03:02,717 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 04:03:02,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 213 transitions. [2022-11-03 04:03:02,718 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 213 transitions. Word has length 75 [2022-11-03 04:03:02,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:02,718 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 213 transitions. [2022-11-03 04:03:02,718 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 04:03:02,718 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 213 transitions. [2022-11-03 04:03:02,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 04:03:02,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:02,719 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 04:03:02,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:02,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:02,932 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:02,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:02,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1081284527, now seen corresponding path program 1 times [2022-11-03 04:03:02,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:02,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1077466709] [2022-11-03 04:03:02,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:02,933 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:02,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:02,934 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:02,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 04:03:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:03,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:03:03,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:03,391 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 04:03:03,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:03,438 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 04:03:03,438 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:03,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1077466709] [2022-11-03 04:03:03,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1077466709] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:03:03,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:03:03,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 04:03:03,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888521992] [2022-11-03 04:03:03,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:03,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:03:03,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:03,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:03:03,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:03:03,440 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 04:03:03,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:03,612 INFO L93 Difference]: Finished difference Result 326 states and 440 transitions. [2022-11-03 04:03:03,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 04:03:03,612 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 04:03:03,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:03,614 INFO L225 Difference]: With dead ends: 326 [2022-11-03 04:03:03,614 INFO L226 Difference]: Without dead ends: 259 [2022-11-03 04:03:03,614 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 04:03:03,615 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 04:03:03,615 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 04:03:03,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-03 04:03:03,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 161. [2022-11-03 04:03:03,624 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 04:03:03,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 212 transitions. [2022-11-03 04:03:03,625 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 212 transitions. Word has length 75 [2022-11-03 04:03:03,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:03,625 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 212 transitions. [2022-11-03 04:03:03,626 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 04:03:03,626 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 212 transitions. [2022-11-03 04:03:03,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 04:03:03,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:03,627 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 04:03:03,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:03,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:03,836 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:03,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:03,836 INFO L85 PathProgramCache]: Analyzing trace with hash 304918867, now seen corresponding path program 1 times [2022-11-03 04:03:03,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:03,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101735724] [2022-11-03 04:03:03,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:03,837 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:03,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:03,838 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:03,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 04:03:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:03,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:03:03,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:04,240 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 04:03:04,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:04,292 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 04:03:04,293 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:04,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101735724] [2022-11-03 04:03:04,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101735724] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:03:04,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:03:04,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 04:03:04,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009131330] [2022-11-03 04:03:04,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:04,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:03:04,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:04,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:03:04,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:03:04,294 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 04:03:04,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:04,469 INFO L93 Difference]: Finished difference Result 326 states and 437 transitions. [2022-11-03 04:03:04,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 04:03:04,469 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 04:03:04,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:04,471 INFO L225 Difference]: With dead ends: 326 [2022-11-03 04:03:04,471 INFO L226 Difference]: Without dead ends: 259 [2022-11-03 04:03:04,472 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 04:03:04,473 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 04:03:04,473 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 04:03:04,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-03 04:03:04,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 161. [2022-11-03 04:03:04,482 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 04:03:04,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 211 transitions. [2022-11-03 04:03:04,482 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 211 transitions. Word has length 75 [2022-11-03 04:03:04,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:04,483 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 211 transitions. [2022-11-03 04:03:04,483 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 04:03:04,483 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 211 transitions. [2022-11-03 04:03:04,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 04:03:04,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:04,484 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:03:04,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:04,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:04,698 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:04,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:04,698 INFO L85 PathProgramCache]: Analyzing trace with hash -2066820395, now seen corresponding path program 1 times [2022-11-03 04:03:04,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:04,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279120492] [2022-11-03 04:03:04,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:04,699 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:04,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:04,700 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:04,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 04:03:04,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:04,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:03:04,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:05,110 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 04:03:05,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:05,161 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 04:03:05,161 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:05,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279120492] [2022-11-03 04:03:05,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279120492] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:03:05,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:03:05,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 04:03:05,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370341142] [2022-11-03 04:03:05,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:05,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:03:05,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:05,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:03:05,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:03:05,165 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 04:03:05,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:05,351 INFO L93 Difference]: Finished difference Result 326 states and 434 transitions. [2022-11-03 04:03:05,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 04:03:05,352 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 04:03:05,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:05,354 INFO L225 Difference]: With dead ends: 326 [2022-11-03 04:03:05,354 INFO L226 Difference]: Without dead ends: 259 [2022-11-03 04:03:05,354 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 04:03:05,355 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 04:03:05,356 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 04:03:05,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-03 04:03:05,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 161. [2022-11-03 04:03:05,363 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 04:03:05,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 210 transitions. [2022-11-03 04:03:05,364 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 210 transitions. Word has length 75 [2022-11-03 04:03:05,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:05,365 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 210 transitions. [2022-11-03 04:03:05,365 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 04:03:05,365 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 210 transitions. [2022-11-03 04:03:05,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 04:03:05,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:05,366 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 04:03:05,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-03 04:03:05,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:05,580 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:05,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:05,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1926271785, now seen corresponding path program 1 times [2022-11-03 04:03:05,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:05,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245341988] [2022-11-03 04:03:05,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:05,581 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:05,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:05,582 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:05,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 04:03:05,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:05,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:03:05,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:05,973 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 04:03:05,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:06,040 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 04:03:06,041 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:06,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245341988] [2022-11-03 04:03:06,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245341988] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:03:06,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:03:06,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 04:03:06,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992047097] [2022-11-03 04:03:06,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:06,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:03:06,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:06,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:03:06,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:03:06,043 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 04:03:06,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:06,219 INFO L93 Difference]: Finished difference Result 326 states and 431 transitions. [2022-11-03 04:03:06,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 04:03:06,220 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 04:03:06,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:06,221 INFO L225 Difference]: With dead ends: 326 [2022-11-03 04:03:06,221 INFO L226 Difference]: Without dead ends: 259 [2022-11-03 04:03:06,222 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 04:03:06,222 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 04:03:06,223 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 04:03:06,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-03 04:03:06,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 161. [2022-11-03 04:03:06,231 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 04:03:06,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 209 transitions. [2022-11-03 04:03:06,232 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 209 transitions. Word has length 75 [2022-11-03 04:03:06,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:06,233 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 209 transitions. [2022-11-03 04:03:06,233 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 04:03:06,233 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 209 transitions. [2022-11-03 04:03:06,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 04:03:06,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:06,234 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 04:03:06,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:06,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:06,448 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:06,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:06,448 INFO L85 PathProgramCache]: Analyzing trace with hash 563257177, now seen corresponding path program 1 times [2022-11-03 04:03:06,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:06,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1710638714] [2022-11-03 04:03:06,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:06,449 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:06,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:06,450 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:06,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 04:03:06,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:06,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:03:06,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:06,841 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 04:03:06,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:06,908 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 04:03:06,909 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:06,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1710638714] [2022-11-03 04:03:06,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1710638714] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:03:06,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:03:06,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 04:03:06,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028786547] [2022-11-03 04:03:06,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:06,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:03:06,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:06,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:03:06,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:03:06,914 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 04:03:07,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:07,098 INFO L93 Difference]: Finished difference Result 326 states and 428 transitions. [2022-11-03 04:03:07,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 04:03:07,099 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 04:03:07,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:07,100 INFO L225 Difference]: With dead ends: 326 [2022-11-03 04:03:07,100 INFO L226 Difference]: Without dead ends: 259 [2022-11-03 04:03:07,101 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 04:03:07,102 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 04:03:07,102 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 04:03:07,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-03 04:03:07,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 161. [2022-11-03 04:03:07,115 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 04:03:07,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 208 transitions. [2022-11-03 04:03:07,116 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 208 transitions. Word has length 75 [2022-11-03 04:03:07,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:07,116 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 208 transitions. [2022-11-03 04:03:07,116 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 04:03:07,116 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 208 transitions. [2022-11-03 04:03:07,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 04:03:07,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:07,119 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 04:03:07,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-03 04:03:07,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:07,324 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:07,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:07,324 INFO L85 PathProgramCache]: Analyzing trace with hash 985959003, now seen corresponding path program 1 times [2022-11-03 04:03:07,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:07,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1295567026] [2022-11-03 04:03:07,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:07,325 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:07,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:07,326 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:07,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 04:03:07,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:07,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:03:07,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:07,714 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 04:03:07,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:07,781 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 04:03:07,781 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:07,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1295567026] [2022-11-03 04:03:07,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1295567026] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:03:07,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:03:07,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 04:03:07,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043205051] [2022-11-03 04:03:07,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:07,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:03:07,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:07,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:03:07,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:03:07,783 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 04:03:07,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:07,967 INFO L93 Difference]: Finished difference Result 326 states and 426 transitions. [2022-11-03 04:03:07,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 04:03:07,968 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 04:03:07,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:07,969 INFO L225 Difference]: With dead ends: 326 [2022-11-03 04:03:07,970 INFO L226 Difference]: Without dead ends: 259 [2022-11-03 04:03:07,970 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 04:03:07,973 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 04:03:07,974 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 04:03:07,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-03 04:03:07,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 161. [2022-11-03 04:03:07,985 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 04:03:07,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 207 transitions. [2022-11-03 04:03:07,986 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 207 transitions. Word has length 75 [2022-11-03 04:03:07,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:07,986 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 207 transitions. [2022-11-03 04:03:07,995 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 04:03:07,995 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 207 transitions. [2022-11-03 04:03:07,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 04:03:07,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:07,996 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 04:03:08,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:08,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:08,210 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:08,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:08,211 INFO L85 PathProgramCache]: Analyzing trace with hash -602388899, now seen corresponding path program 1 times [2022-11-03 04:03:08,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:08,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124766051] [2022-11-03 04:03:08,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:08,212 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:08,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:08,214 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:08,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 04:03:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:08,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:03:08,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:08,500 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 04:03:08,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:08,628 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 04:03:08,628 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:08,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124766051] [2022-11-03 04:03:08,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124766051] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:08,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1555004370] [2022-11-03 04:03:08,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:08,629 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:08,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:08,632 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:08,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-03 04:03:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:08,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:03:08,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:08,923 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 04:03:08,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:03:08,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1555004370] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:03:08,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:03:08,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 04:03:08,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317843216] [2022-11-03 04:03:08,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:08,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:03:08,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:08,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:03:08,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:03:08,926 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 04:03:09,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:09,050 INFO L93 Difference]: Finished difference Result 328 states and 427 transitions. [2022-11-03 04:03:09,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:03:09,052 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 04:03:09,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:09,053 INFO L225 Difference]: With dead ends: 328 [2022-11-03 04:03:09,054 INFO L226 Difference]: Without dead ends: 261 [2022-11-03 04:03:09,054 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 04:03:09,055 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 04:03:09,055 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 04:03:09,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-03 04:03:09,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 161. [2022-11-03 04:03:09,064 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 04:03:09,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 206 transitions. [2022-11-03 04:03:09,064 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 206 transitions. Word has length 75 [2022-11-03 04:03:09,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:09,065 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 206 transitions. [2022-11-03 04:03:09,065 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 04:03:09,065 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 206 transitions. [2022-11-03 04:03:09,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 04:03:09,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:09,066 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 04:03:09,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2022-11-03 04:03:09,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:09,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:09,470 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:09,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:09,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1189194913, now seen corresponding path program 1 times [2022-11-03 04:03:09,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:09,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13095187] [2022-11-03 04:03:09,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:09,471 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:09,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:09,472 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:09,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 04:03:09,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:09,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:03:09,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:09,794 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 04:03:09,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:09,925 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 04:03:09,926 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:09,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13095187] [2022-11-03 04:03:09,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13095187] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:09,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1356359277] [2022-11-03 04:03:09,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:09,926 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:09,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:09,927 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:09,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-03 04:03:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:10,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:03:10,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:10,302 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 04:03:10,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:10,419 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 04:03:10,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1356359277] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:10,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988364044] [2022-11-03 04:03:10,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:10,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:10,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:10,420 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:10,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-03 04:03:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:10,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:03:10,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:10,672 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 04:03:10,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:10,772 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 04:03:10,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988364044] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:10,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:03:10,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-03 04:03:10,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782666958] [2022-11-03 04:03:10,773 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:03:10,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 04:03:10,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:10,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 04:03:10,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:03:10,777 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 04:03:11,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:11,189 INFO L93 Difference]: Finished difference Result 665 states and 892 transitions. [2022-11-03 04:03:11,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 04:03:11,190 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 04:03:11,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:11,192 INFO L225 Difference]: With dead ends: 665 [2022-11-03 04:03:11,192 INFO L226 Difference]: Without dead ends: 563 [2022-11-03 04:03:11,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2022-11-03 04:03:11,193 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 841 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:11,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 287 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:03:11,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-11-03 04:03:11,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 283. [2022-11-03 04:03:11,209 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 04:03:11,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 373 transitions. [2022-11-03 04:03:11,210 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 373 transitions. Word has length 75 [2022-11-03 04:03:11,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:11,211 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 373 transitions. [2022-11-03 04:03:11,211 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 04:03:11,211 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 373 transitions. [2022-11-03 04:03:11,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 04:03:11,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:11,212 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 04:03:11,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-03 04:03:11,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:11,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-03 04:03:11,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:11,826 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:11,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:11,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1825908705, now seen corresponding path program 1 times [2022-11-03 04:03:11,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:11,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282678409] [2022-11-03 04:03:11,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:11,827 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:11,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:11,828 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:11,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 04:03:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:11,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 04:03:11,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:12,677 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 04:03:12,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:15,358 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 04:03:15,358 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:15,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282678409] [2022-11-03 04:03:15,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282678409] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:15,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1936662641] [2022-11-03 04:03:15,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:15,359 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:15,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:15,360 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:15,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-03 04:03:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:15,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 04:03:15,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:16,005 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 04:03:16,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:16,629 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 04:03:16,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1936662641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:16,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738722476] [2022-11-03 04:03:16,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:16,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:16,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:16,632 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:16,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-03 04:03:16,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:16,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-03 04:03:16,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:17,221 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 04:03:17,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:17,968 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 04:03:17,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738722476] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:17,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:03:17,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21, 21, 22, 22] total 42 [2022-11-03 04:03:17,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257252516] [2022-11-03 04:03:17,970 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:03:17,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 04:03:17,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:17,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 04:03:17,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1591, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 04:03:17,972 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 04:03:24,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:24,462 INFO L93 Difference]: Finished difference Result 1353 states and 1791 transitions. [2022-11-03 04:03:24,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-03 04:03:24,463 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 04:03:24,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:24,467 INFO L225 Difference]: With dead ends: 1353 [2022-11-03 04:03:24,467 INFO L226 Difference]: Without dead ends: 1351 [2022-11-03 04:03:24,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 405 SyntacticMatches, 8 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3408 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=2049, Invalid=10383, Unknown=0, NotChecked=0, Total=12432 [2022-11-03 04:03:24,471 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 1684 mSDsluCounter, 2289 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1684 SdHoareTripleChecker+Valid, 2405 SdHoareTripleChecker+Invalid, 2505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1703 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:24,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1684 Valid, 2405 Invalid, 2505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 715 Invalid, 0 Unknown, 1703 Unchecked, 0.8s Time] [2022-11-03 04:03:24,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2022-11-03 04:03:24,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 397. [2022-11-03 04:03:24,501 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 04:03:24,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 529 transitions. [2022-11-03 04:03:24,502 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 529 transitions. Word has length 75 [2022-11-03 04:03:24,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:24,502 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 529 transitions. [2022-11-03 04:03:24,503 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 04:03:24,503 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 529 transitions. [2022-11-03 04:03:24,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 04:03:24,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:24,504 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 04:03:24,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:24,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-03 04:03:24,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:25,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:25,118 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:25,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:25,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1898295263, now seen corresponding path program 1 times [2022-11-03 04:03:25,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:25,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851229572] [2022-11-03 04:03:25,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:25,119 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:25,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:25,120 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:25,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 04:03:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:25,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:03:25,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:25,414 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 04:03:25,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:25,512 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 04:03:25,512 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:25,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851229572] [2022-11-03 04:03:25,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851229572] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:25,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [182426876] [2022-11-03 04:03:25,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:25,513 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:25,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:25,514 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:25,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-03 04:03:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:25,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:03:25,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:25,881 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 04:03:25,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:25,948 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 04:03:25,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [182426876] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:25,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481829894] [2022-11-03 04:03:25,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:25,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:25,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:25,950 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:25,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-03 04:03:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:26,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:03:26,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:26,194 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 04:03:26,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:26,262 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 04:03:26,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481829894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:26,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:03:26,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-03 04:03:26,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070229407] [2022-11-03 04:03:26,263 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:03:26,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 04:03:26,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:26,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 04:03:26,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:03:26,265 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 04:03:26,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:26,679 INFO L93 Difference]: Finished difference Result 1872 states and 2524 transitions. [2022-11-03 04:03:26,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 04:03:26,680 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 04:03:26,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:26,686 INFO L225 Difference]: With dead ends: 1872 [2022-11-03 04:03:26,686 INFO L226 Difference]: Without dead ends: 1503 [2022-11-03 04:03:26,687 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 04:03:26,688 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 758 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:26,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [758 Valid, 333 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:03:26,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2022-11-03 04:03:26,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 563. [2022-11-03 04:03:26,742 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 04:03:26,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 755 transitions. [2022-11-03 04:03:26,745 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 755 transitions. Word has length 75 [2022-11-03 04:03:26,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:26,745 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 755 transitions. [2022-11-03 04:03:26,745 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 04:03:26,745 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 755 transitions. [2022-11-03 04:03:26,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 04:03:26,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:26,747 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 04:03:26,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:26,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-11-03 04:03:27,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-11-03 04:03:27,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:27,361 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:27,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:27,362 INFO L85 PathProgramCache]: Analyzing trace with hash 454101407, now seen corresponding path program 1 times [2022-11-03 04:03:27,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:27,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940570244] [2022-11-03 04:03:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:27,363 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:27,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:27,364 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:27,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 04:03:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:27,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:03:27,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:27,563 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 04:03:27,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:03:27,563 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:27,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940570244] [2022-11-03 04:03:27,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940570244] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:03:27,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:03:27,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:03:27,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385244417] [2022-11-03 04:03:27,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:27,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:03:27,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:27,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:03:27,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:03:27,565 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 04:03:27,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:27,676 INFO L93 Difference]: Finished difference Result 1357 states and 1826 transitions. [2022-11-03 04:03:27,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:03:27,677 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 04:03:27,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:27,680 INFO L225 Difference]: With dead ends: 1357 [2022-11-03 04:03:27,680 INFO L226 Difference]: Without dead ends: 820 [2022-11-03 04:03:27,681 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 04:03:27,682 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 04:03:27,682 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 04:03:27,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-11-03 04:03:27,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 563. [2022-11-03 04:03:27,727 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 04:03:27,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 739 transitions. [2022-11-03 04:03:27,729 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 739 transitions. Word has length 75 [2022-11-03 04:03:27,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:27,730 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 739 transitions. [2022-11-03 04:03:27,730 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 04:03:27,730 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 739 transitions. [2022-11-03 04:03:27,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 04:03:27,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:27,732 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 04:03:27,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-03 04:03:27,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:27,945 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:27,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:27,945 INFO L85 PathProgramCache]: Analyzing trace with hash -529896545, now seen corresponding path program 1 times [2022-11-03 04:03:27,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:27,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518199795] [2022-11-03 04:03:27,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:27,947 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:27,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:27,948 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:27,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 04:03:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:28,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:03:28,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:28,213 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 04:03:28,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:03:28,214 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:28,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518199795] [2022-11-03 04:03:28,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518199795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:03:28,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:03:28,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:03:28,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519785925] [2022-11-03 04:03:28,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:28,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:03:28,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:28,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:03:28,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:03:28,216 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 04:03:28,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:28,376 INFO L93 Difference]: Finished difference Result 1354 states and 1763 transitions. [2022-11-03 04:03:28,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 04:03:28,380 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 04:03:28,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:28,384 INFO L225 Difference]: With dead ends: 1354 [2022-11-03 04:03:28,384 INFO L226 Difference]: Without dead ends: 817 [2022-11-03 04:03:28,385 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 04:03:28,385 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 153 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:28,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 335 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-11-03 04:03:28,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-11-03 04:03:28,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 583. [2022-11-03 04:03:28,431 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 04:03:28,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 761 transitions. [2022-11-03 04:03:28,433 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 761 transitions. Word has length 75 [2022-11-03 04:03:28,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:28,433 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 761 transitions. [2022-11-03 04:03:28,434 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 04:03:28,434 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 761 transitions. [2022-11-03 04:03:28,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 04:03:28,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:28,436 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 04:03:28,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-03 04:03:28,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:28,644 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:28,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:28,644 INFO L85 PathProgramCache]: Analyzing trace with hash -858332003, now seen corresponding path program 1 times [2022-11-03 04:03:28,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:28,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18878844] [2022-11-03 04:03:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:28,645 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:28,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:28,646 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:28,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 04:03:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:28,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:03:28,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:28,914 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 04:03:28,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:03:28,914 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:28,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18878844] [2022-11-03 04:03:28,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18878844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:03:28,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:03:28,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:03:28,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097218302] [2022-11-03 04:03:28,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:28,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:03:28,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:28,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:03:28,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:03:28,916 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 04:03:29,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:29,055 INFO L93 Difference]: Finished difference Result 1228 states and 1601 transitions. [2022-11-03 04:03:29,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 04:03:29,060 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 04:03:29,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:29,062 INFO L225 Difference]: With dead ends: 1228 [2022-11-03 04:03:29,063 INFO L226 Difference]: Without dead ends: 683 [2022-11-03 04:03:29,064 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 04:03:29,064 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 112 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:29,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 427 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-11-03 04:03:29,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-11-03 04:03:29,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 575. [2022-11-03 04:03:29,108 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 04:03:29,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 751 transitions. [2022-11-03 04:03:29,110 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 751 transitions. Word has length 75 [2022-11-03 04:03:29,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:29,111 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 751 transitions. [2022-11-03 04:03:29,111 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 04:03:29,111 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 751 transitions. [2022-11-03 04:03:29,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 04:03:29,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:29,113 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 04:03:29,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:29,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:29,326 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:29,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:29,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1303242831, now seen corresponding path program 1 times [2022-11-03 04:03:29,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:29,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [218986363] [2022-11-03 04:03:29,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:29,327 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:29,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:29,328 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:29,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 04:03:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:29,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:03:29,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:29,692 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 04:03:29,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:29,771 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 04:03:29,771 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:29,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [218986363] [2022-11-03 04:03:29,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [218986363] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:03:29,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:03:29,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-03 04:03:29,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204853185] [2022-11-03 04:03:29,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:29,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:03:29,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:29,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:03:29,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:03:29,775 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 04:03:29,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:29,983 INFO L93 Difference]: Finished difference Result 1151 states and 1488 transitions. [2022-11-03 04:03:29,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 04:03:29,983 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 04:03:29,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:29,987 INFO L225 Difference]: With dead ends: 1151 [2022-11-03 04:03:29,987 INFO L226 Difference]: Without dead ends: 614 [2022-11-03 04:03:29,987 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 04:03:29,988 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 04:03:29,988 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 04:03:29,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-11-03 04:03:30,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 511. [2022-11-03 04:03:30,039 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 04:03:30,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 655 transitions. [2022-11-03 04:03:30,040 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 655 transitions. Word has length 75 [2022-11-03 04:03:30,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:30,041 INFO L495 AbstractCegarLoop]: Abstraction has 511 states and 655 transitions. [2022-11-03 04:03:30,041 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 04:03:30,041 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 655 transitions. [2022-11-03 04:03:30,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 04:03:30,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:30,042 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 04:03:30,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:30,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:30,256 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:30,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:30,256 INFO L85 PathProgramCache]: Analyzing trace with hash 385700911, now seen corresponding path program 2 times [2022-11-03 04:03:30,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:30,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [540569725] [2022-11-03 04:03:30,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:03:30,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:30,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:30,258 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:30,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 04:03:30,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:03:30,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:03:30,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 04:03:30,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:30,780 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 04:03:30,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:31,603 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 04:03:31,603 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:31,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [540569725] [2022-11-03 04:03:31,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [540569725] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:31,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [243143794] [2022-11-03 04:03:31,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:03:31,604 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:31,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:31,606 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:31,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-03 04:03:31,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:03:31,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:03:31,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 04:03:31,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:32,179 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 04:03:32,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:32,595 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 04:03:32,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [243143794] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:32,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578666755] [2022-11-03 04:03:32,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:03:32,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:32,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:32,596 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:32,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-03 04:03:32,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:03:32,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:03:32,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 04:03:32,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:33,161 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 04:03:33,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:33,718 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 04:03:33,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578666755] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:33,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:03:33,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 12, 12] total 22 [2022-11-03 04:03:33,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249880461] [2022-11-03 04:03:33,720 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:03:33,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 04:03:33,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:33,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 04:03:33,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-11-03 04:03:33,722 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 04:03:34,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:34,672 INFO L93 Difference]: Finished difference Result 669 states and 860 transitions. [2022-11-03 04:03:34,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 04:03:34,672 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 04:03:34,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:34,678 INFO L225 Difference]: With dead ends: 669 [2022-11-03 04:03:34,678 INFO L226 Difference]: Without dead ends: 667 [2022-11-03 04:03:34,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 425 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 04:03:34,680 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 882 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 346 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:34,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [882 Valid, 469 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 189 Invalid, 0 Unknown, 346 Unchecked, 0.2s Time] [2022-11-03 04:03:34,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-11-03 04:03:34,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 331. [2022-11-03 04:03:34,730 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 04:03:34,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 410 transitions. [2022-11-03 04:03:34,731 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 410 transitions. Word has length 75 [2022-11-03 04:03:34,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:34,731 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 410 transitions. [2022-11-03 04:03:34,732 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 04:03:34,732 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 410 transitions. [2022-11-03 04:03:34,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 04:03:34,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:34,733 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 04:03:34,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:34,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:35,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:35,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:35,338 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:35,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:35,338 INFO L85 PathProgramCache]: Analyzing trace with hash 223295559, now seen corresponding path program 1 times [2022-11-03 04:03:35,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:35,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507476488] [2022-11-03 04:03:35,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:35,339 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:35,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:35,341 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:35,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 04:03:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:35,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 04:03:35,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:36,609 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 04:03:36,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:40,488 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 04:03:40,489 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:40,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507476488] [2022-11-03 04:03:40,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507476488] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:40,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1844709880] [2022-11-03 04:03:40,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:40,489 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:40,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:40,490 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:40,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-03 04:03:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:40,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 04:03:40,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:41,417 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 04:03:41,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:42,202 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 04:03:42,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1844709880] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:42,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222394019] [2022-11-03 04:03:42,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:42,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:42,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:42,204 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:42,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-03 04:03:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:42,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-03 04:03:42,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:43,047 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 04:03:43,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:43,967 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 04:03:43,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222394019] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:43,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:03:43,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23, 23, 24, 24] total 46 [2022-11-03 04:03:43,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376796175] [2022-11-03 04:03:43,968 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:03:43,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-03 04:03:43,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:43,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-03 04:03:43,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1955, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 04:03:43,970 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 04:03:46,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:46,314 INFO L93 Difference]: Finished difference Result 737 states and 926 transitions. [2022-11-03 04:03:46,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-03 04:03:46,315 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 04:03:46,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:46,316 INFO L225 Difference]: With dead ends: 737 [2022-11-03 04:03:46,317 INFO L226 Difference]: Without dead ends: 735 [2022-11-03 04:03:46,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 398 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=507, Invalid=4463, Unknown=0, NotChecked=0, Total=4970 [2022-11-03 04:03:46,318 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 691 mSDsluCounter, 3509 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 3634 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 940 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:46,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 3634 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 488 Invalid, 0 Unknown, 940 Unchecked, 0.4s Time] [2022-11-03 04:03:46,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-11-03 04:03:46,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 361. [2022-11-03 04:03:46,361 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 04:03:46,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 443 transitions. [2022-11-03 04:03:46,362 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 443 transitions. Word has length 75 [2022-11-03 04:03:46,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:46,362 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 443 transitions. [2022-11-03 04:03:46,363 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 04:03:46,363 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 443 transitions. [2022-11-03 04:03:46,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 04:03:46,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:46,364 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 04:03:46,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:46,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:46,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-11-03 04:03:46,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:46,978 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:46,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:46,978 INFO L85 PathProgramCache]: Analyzing trace with hash 295682117, now seen corresponding path program 1 times [2022-11-03 04:03:46,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:46,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066625025] [2022-11-03 04:03:46,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:46,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:46,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:46,980 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:46,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-03 04:03:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:47,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:03:47,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:47,246 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 04:03:47,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:47,344 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 04:03:47,344 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:47,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066625025] [2022-11-03 04:03:47,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066625025] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:47,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [806000423] [2022-11-03 04:03:47,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:47,344 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:47,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:47,345 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:47,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-03 04:03:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:47,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:03:47,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:47,725 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 04:03:47,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:47,797 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 04:03:47,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [806000423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:47,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851757446] [2022-11-03 04:03:47,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:47,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:47,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:47,800 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:47,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-03 04:03:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:47,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:03:47,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:48,034 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 04:03:48,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:48,098 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 04:03:48,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851757446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:48,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:03:48,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-03 04:03:48,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555469527] [2022-11-03 04:03:48,099 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:03:48,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 04:03:48,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:48,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 04:03:48,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:03:48,101 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 04:03:48,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:48,377 INFO L93 Difference]: Finished difference Result 1190 states and 1482 transitions. [2022-11-03 04:03:48,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 04:03:48,378 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 04:03:48,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:48,380 INFO L225 Difference]: With dead ends: 1190 [2022-11-03 04:03:48,381 INFO L226 Difference]: Without dead ends: 897 [2022-11-03 04:03:48,381 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 04:03:48,382 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 390 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:48,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 653 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:03:48,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-11-03 04:03:48,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 375. [2022-11-03 04:03:48,419 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 04:03:48,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 459 transitions. [2022-11-03 04:03:48,420 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 459 transitions. Word has length 75 [2022-11-03 04:03:48,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:48,421 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 459 transitions. [2022-11-03 04:03:48,421 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 04:03:48,421 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 459 transitions. [2022-11-03 04:03:48,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 04:03:48,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:48,422 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:03:48,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:48,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-11-03 04:03:48,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-11-03 04:03:49,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:49,027 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:49,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:49,027 INFO L85 PathProgramCache]: Analyzing trace with hash -652723447, now seen corresponding path program 1 times [2022-11-03 04:03:49,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:49,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174023173] [2022-11-03 04:03:49,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:49,028 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:49,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:49,029 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:49,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 04:03:49,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:49,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:03:49,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:49,285 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 04:03:49,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:03:49,285 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:49,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174023173] [2022-11-03 04:03:49,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174023173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:03:49,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:03:49,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:03:49,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804874484] [2022-11-03 04:03:49,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:49,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:03:49,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:49,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:03:49,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:03:49,287 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 04:03:49,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:49,386 INFO L93 Difference]: Finished difference Result 717 states and 879 transitions. [2022-11-03 04:03:49,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:03:49,387 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 04:03:49,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:49,388 INFO L225 Difference]: With dead ends: 717 [2022-11-03 04:03:49,388 INFO L226 Difference]: Without dead ends: 410 [2022-11-03 04:03:49,389 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 04:03:49,389 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 65 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:49,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 315 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-11-03 04:03:49,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-11-03 04:03:49,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 361. [2022-11-03 04:03:49,425 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 04:03:49,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 442 transitions. [2022-11-03 04:03:49,426 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 442 transitions. Word has length 75 [2022-11-03 04:03:49,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:49,426 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 442 transitions. [2022-11-03 04:03:49,426 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 04:03:49,426 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 442 transitions. [2022-11-03 04:03:49,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 04:03:49,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:49,428 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 04:03:49,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-11-03 04:03:49,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:49,641 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:49,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:49,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1540869949, now seen corresponding path program 2 times [2022-11-03 04:03:49,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:49,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730482251] [2022-11-03 04:03:49,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:03:49,642 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:49,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:49,643 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:49,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-03 04:03:49,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:03:49,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:03:49,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:03:49,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:50,075 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 04:03:50,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:50,172 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 04:03:50,172 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:50,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730482251] [2022-11-03 04:03:50,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730482251] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:03:50,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:03:50,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-03 04:03:50,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882558485] [2022-11-03 04:03:50,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:50,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:03:50,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:50,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:03:50,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:03:50,174 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 04:03:50,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:50,368 INFO L93 Difference]: Finished difference Result 684 states and 839 transitions. [2022-11-03 04:03:50,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:03:50,369 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 04:03:50,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:50,370 INFO L225 Difference]: With dead ends: 684 [2022-11-03 04:03:50,371 INFO L226 Difference]: Without dead ends: 391 [2022-11-03 04:03:50,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 212 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 04:03:50,372 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 04:03:50,372 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 04:03:50,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-11-03 04:03:50,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 300. [2022-11-03 04:03:50,397 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 04:03:50,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 361 transitions. [2022-11-03 04:03:50,398 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 361 transitions. Word has length 110 [2022-11-03 04:03:50,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:50,398 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 361 transitions. [2022-11-03 04:03:50,398 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 04:03:50,399 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 361 transitions. [2022-11-03 04:03:50,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 04:03:50,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:50,400 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 04:03:50,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:50,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:50,614 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:50,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:50,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1212434491, now seen corresponding path program 2 times [2022-11-03 04:03:50,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:50,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21802315] [2022-11-03 04:03:50,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:03:50,616 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:50,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:50,618 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:50,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-03 04:03:50,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:03:50,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:03:50,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:03:50,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:51,016 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 04:03:51,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:51,084 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 04:03:51,084 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:51,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21802315] [2022-11-03 04:03:51,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21802315] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:03:51,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:03:51,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-03 04:03:51,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424865035] [2022-11-03 04:03:51,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:51,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:03:51,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:51,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:03:51,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:03:51,086 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 04:03:51,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:51,246 INFO L93 Difference]: Finished difference Result 522 states and 629 transitions. [2022-11-03 04:03:51,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:03:51,247 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 04:03:51,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:51,248 INFO L225 Difference]: With dead ends: 522 [2022-11-03 04:03:51,248 INFO L226 Difference]: Without dead ends: 282 [2022-11-03 04:03:51,248 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 04:03:51,249 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 04:03:51,249 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 04:03:51,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-11-03 04:03:51,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 214. [2022-11-03 04:03:51,259 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 04:03:51,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 251 transitions. [2022-11-03 04:03:51,260 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 251 transitions. Word has length 110 [2022-11-03 04:03:51,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:51,260 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 251 transitions. [2022-11-03 04:03:51,260 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 04:03:51,260 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 251 transitions. [2022-11-03 04:03:51,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 04:03:51,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:51,262 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 04:03:51,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:51,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:51,476 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:51,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:51,476 INFO L85 PathProgramCache]: Analyzing trace with hash -2000905243, now seen corresponding path program 3 times [2022-11-03 04:03:51,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:51,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811236685] [2022-11-03 04:03:51,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:03:51,477 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:51,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:51,478 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:51,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-03 04:03:51,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 04:03:51,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:03:51,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-03 04:03:51,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:53,257 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 04:03:53,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:01,000 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 04:04:01,001 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:01,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811236685] [2022-11-03 04:04:01,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811236685] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:01,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1347742047] [2022-11-03 04:04:01,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:04:01,002 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:01,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:01,003 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:01,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-03 04:04:01,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 04:04:01,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:04:01,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-03 04:04:01,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:02,183 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 04:04:02,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:03,166 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 04:04:03,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1347742047] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:03,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187794242] [2022-11-03 04:04:03,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:04:03,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:03,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:04:03,170 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:04:03,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-03 04:04:03,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 04:04:03,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:04:03,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-03 04:04:03,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:04,281 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 04:04:04,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:05,417 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 04:04:05,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187794242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:05,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:04:05,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34, 34, 35, 35] total 68 [2022-11-03 04:04:05,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187090095] [2022-11-03 04:04:05,418 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:04:05,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-03 04:04:05,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:05,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-03 04:04:05,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=4259, Unknown=0, NotChecked=0, Total=4556 [2022-11-03 04:04:05,420 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 04:04:28,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:28,422 INFO L93 Difference]: Finished difference Result 1674 states and 2058 transitions. [2022-11-03 04:04:28,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-11-03 04:04:28,422 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 04:04:28,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:28,428 INFO L225 Difference]: With dead ends: 1674 [2022-11-03 04:04:28,428 INFO L226 Difference]: Without dead ends: 1672 [2022-11-03 04:04:28,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 617 SyntacticMatches, 7 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11517 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=4566, Invalid=39324, Unknown=0, NotChecked=0, Total=43890 [2022-11-03 04:04:28,434 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 4892 mSDsluCounter, 6725 mSDsCounter, 0 mSdLazyCounter, 3267 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4892 SdHoareTripleChecker+Valid, 6895 SdHoareTripleChecker+Invalid, 12897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 3267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9310 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:28,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4892 Valid, 6895 Invalid, 12897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 3267 Invalid, 0 Unknown, 9310 Unchecked, 2.8s Time] [2022-11-03 04:04:28,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2022-11-03 04:04:28,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 345. [2022-11-03 04:04:28,478 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 04:04:28,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 409 transitions. [2022-11-03 04:04:28,479 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 409 transitions. Word has length 110 [2022-11-03 04:04:28,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:28,479 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 409 transitions. [2022-11-03 04:04:28,479 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 04:04:28,480 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 409 transitions. [2022-11-03 04:04:28,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 04:04:28,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:28,481 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 04:04:28,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:28,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:28,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 0 [2022-11-03 04:04:29,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:29,094 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:29,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:29,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1928518685, now seen corresponding path program 1 times [2022-11-03 04:04:29,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:29,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833552237] [2022-11-03 04:04:29,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:29,096 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:29,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:29,096 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:29,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-03 04:04:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:29,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:04:29,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:29,557 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 04:04:29,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:29,808 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 04:04:29,809 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:29,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833552237] [2022-11-03 04:04:29,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833552237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:29,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1213236930] [2022-11-03 04:04:29,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:29,809 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:29,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:29,810 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:29,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-03 04:04:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:30,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:04:30,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:30,383 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 04:04:30,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:30,509 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 04:04:30,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1213236930] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:30,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293248239] [2022-11-03 04:04:30,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:30,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:30,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:04:30,510 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:04:30,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-03 04:04:30,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:30,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:04:30,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:30,903 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 04:04:30,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:31,043 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 04:04:31,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293248239] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:31,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:04:31,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 19 [2022-11-03 04:04:31,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726506647] [2022-11-03 04:04:31,044 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:04:31,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 04:04:31,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:31,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 04:04:31,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:04:31,046 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 04:04:32,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:32,337 INFO L93 Difference]: Finished difference Result 2112 states and 2529 transitions. [2022-11-03 04:04:32,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-03 04:04:32,337 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 04:04:32,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:32,340 INFO L225 Difference]: With dead ends: 2112 [2022-11-03 04:04:32,340 INFO L226 Difference]: Without dead ends: 1803 [2022-11-03 04:04:32,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 637 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=647, Invalid=2323, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 04:04:32,342 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 1716 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1716 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:32,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1716 Valid, 773 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 04:04:32,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2022-11-03 04:04:32,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 546. [2022-11-03 04:04:32,399 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 04:04:32,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 639 transitions. [2022-11-03 04:04:32,400 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 639 transitions. Word has length 110 [2022-11-03 04:04:32,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:32,400 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 639 transitions. [2022-11-03 04:04:32,401 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 04:04:32,401 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 639 transitions. [2022-11-03 04:04:32,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 04:04:32,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:32,402 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 04:04:32,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 0 [2022-11-03 04:04:32,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-11-03 04:04:32,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-11-03 04:04:33,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:33,007 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:33,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:33,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1418043047, now seen corresponding path program 4 times [2022-11-03 04:04:33,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:33,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622705208] [2022-11-03 04:04:33,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 04:04:33,008 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:33,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:33,009 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:33,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-03 04:04:33,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 04:04:33,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:04:33,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:04:33,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:33,421 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 04:04:33,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:33,470 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 04:04:33,471 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:33,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622705208] [2022-11-03 04:04:33,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622705208] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:04:33,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:04:33,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 04:04:33,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667312509] [2022-11-03 04:04:33,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:33,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:04:33,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:33,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:04:33,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:04:33,472 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 04:04:33,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:33,640 INFO L93 Difference]: Finished difference Result 1124 states and 1321 transitions. [2022-11-03 04:04:33,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:04:33,640 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 04:04:33,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:33,644 INFO L225 Difference]: With dead ends: 1124 [2022-11-03 04:04:33,644 INFO L226 Difference]: Without dead ends: 600 [2022-11-03 04:04:33,644 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 04:04:33,645 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 04:04:33,645 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 04:04:33,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-11-03 04:04:33,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 526. [2022-11-03 04:04:33,683 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 04:04:33,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 609 transitions. [2022-11-03 04:04:33,684 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 609 transitions. Word has length 110 [2022-11-03 04:04:33,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:33,684 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 609 transitions. [2022-11-03 04:04:33,684 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 04:04:33,685 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 609 transitions. [2022-11-03 04:04:33,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 04:04:33,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:33,686 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 04:04:33,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-11-03 04:04:33,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:04:33,900 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:33,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:33,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1973839641, now seen corresponding path program 1 times [2022-11-03 04:04:33,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:33,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005442456] [2022-11-03 04:04:33,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:33,902 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:33,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:33,903 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:33,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-03 04:04:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:34,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:04:34,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:34,142 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 04:04:34,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:04:34,143 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:34,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005442456] [2022-11-03 04:04:34,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005442456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:34,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:04:34,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:04:34,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782793449] [2022-11-03 04:04:34,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:34,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:04:34,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:34,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:04:34,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:04:34,145 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 04:04:34,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:34,251 INFO L93 Difference]: Finished difference Result 1317 states and 1536 transitions. [2022-11-03 04:04:34,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:04:34,252 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 04:04:34,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:34,253 INFO L225 Difference]: With dead ends: 1317 [2022-11-03 04:04:34,253 INFO L226 Difference]: Without dead ends: 793 [2022-11-03 04:04:34,254 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 04:04:34,254 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 04:04:34,255 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 04:04:34,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-11-03 04:04:34,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 526. [2022-11-03 04:04:34,308 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 04:04:34,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 601 transitions. [2022-11-03 04:04:34,309 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 601 transitions. Word has length 110 [2022-11-03 04:04:34,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:34,310 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 601 transitions. [2022-11-03 04:04:34,310 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 04:04:34,310 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 601 transitions. [2022-11-03 04:04:34,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 04:04:34,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:34,312 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 04:04:34,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:34,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:04:34,527 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:34,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:34,527 INFO L85 PathProgramCache]: Analyzing trace with hash 425866597, now seen corresponding path program 1 times [2022-11-03 04:04:34,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:34,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031364835] [2022-11-03 04:04:34,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:34,528 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:34,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:34,529 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:34,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-03 04:04:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:34,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:04:34,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:34,822 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 04:04:34,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:04:34,823 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:34,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031364835] [2022-11-03 04:04:34,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2031364835] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:34,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:04:34,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:04:34,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158738190] [2022-11-03 04:04:34,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:34,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:04:34,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:34,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:04:34,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:04:34,824 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 04:04:34,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:34,977 INFO L93 Difference]: Finished difference Result 1260 states and 1448 transitions. [2022-11-03 04:04:34,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 04:04:34,978 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 04:04:34,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:34,980 INFO L225 Difference]: With dead ends: 1260 [2022-11-03 04:04:34,980 INFO L226 Difference]: Without dead ends: 736 [2022-11-03 04:04:34,981 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 04:04:34,981 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 109 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:34,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 404 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-03 04:04:34,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-11-03 04:04:35,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 556. [2022-11-03 04:04:35,066 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 04:04:35,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 639 transitions. [2022-11-03 04:04:35,068 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 639 transitions. Word has length 110 [2022-11-03 04:04:35,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:35,069 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 639 transitions. [2022-11-03 04:04:35,069 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 04:04:35,069 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 639 transitions. [2022-11-03 04:04:35,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 04:04:35,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:35,070 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 04:04:35,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:35,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:04:35,285 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:35,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:35,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1891633321, now seen corresponding path program 1 times [2022-11-03 04:04:35,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:35,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698800534] [2022-11-03 04:04:35,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:35,286 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:35,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:35,287 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:35,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-03 04:04:35,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:35,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:04:35,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:35,575 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 04:04:35,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:04:35,576 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:35,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698800534] [2022-11-03 04:04:35,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698800534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:35,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:04:35,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:04:35,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466946658] [2022-11-03 04:04:35,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:35,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:04:35,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:35,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:04:35,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:04:35,577 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 04:04:35,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:35,698 INFO L93 Difference]: Finished difference Result 1160 states and 1329 transitions. [2022-11-03 04:04:35,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:04:35,699 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 04:04:35,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:35,700 INFO L225 Difference]: With dead ends: 1160 [2022-11-03 04:04:35,700 INFO L226 Difference]: Without dead ends: 632 [2022-11-03 04:04:35,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 103 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 04:04:35,701 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 74 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:35,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 334 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-11-03 04:04:35,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-11-03 04:04:35,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 552. [2022-11-03 04:04:35,746 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 04:04:35,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 633 transitions. [2022-11-03 04:04:35,747 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 633 transitions. Word has length 110 [2022-11-03 04:04:35,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:35,747 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 633 transitions. [2022-11-03 04:04:35,747 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 04:04:35,747 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 633 transitions. [2022-11-03 04:04:35,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 04:04:35,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:35,748 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 04:04:35,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-11-03 04:04:35,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:04:35,960 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:35,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:35,961 INFO L85 PathProgramCache]: Analyzing trace with hash -649520025, now seen corresponding path program 1 times [2022-11-03 04:04:35,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:35,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085740525] [2022-11-03 04:04:35,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:35,962 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:35,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:35,963 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:35,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-03 04:04:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:36,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:04:36,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:36,284 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 04:04:36,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:04:36,284 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:36,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085740525] [2022-11-03 04:04:36,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085740525] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:36,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:04:36,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:04:36,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379020043] [2022-11-03 04:04:36,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:36,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:04:36,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:36,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:04:36,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:04:36,286 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 04:04:36,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:36,441 INFO L93 Difference]: Finished difference Result 1152 states and 1317 transitions. [2022-11-03 04:04:36,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 04:04:36,441 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 04:04:36,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:36,444 INFO L225 Difference]: With dead ends: 1152 [2022-11-03 04:04:36,444 INFO L226 Difference]: Without dead ends: 624 [2022-11-03 04:04:36,444 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 04:04:36,445 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 142 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:36,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 284 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-11-03 04:04:36,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-11-03 04:04:36,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 552. [2022-11-03 04:04:36,480 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 04:04:36,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 631 transitions. [2022-11-03 04:04:36,481 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 631 transitions. Word has length 110 [2022-11-03 04:04:36,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:36,481 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 631 transitions. [2022-11-03 04:04:36,481 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 04:04:36,482 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 631 transitions. [2022-11-03 04:04:36,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 04:04:36,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:36,483 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 04:04:36,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:36,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:04:36,696 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:36,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:36,697 INFO L85 PathProgramCache]: Analyzing trace with hash -399834137, now seen corresponding path program 1 times [2022-11-03 04:04:36,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:36,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449875982] [2022-11-03 04:04:36,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:36,698 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:36,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:36,699 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:36,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 04:04:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:36,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:04:36,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:37,022 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 04:04:37,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:04:37,023 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:37,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449875982] [2022-11-03 04:04:37,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449875982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:37,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:04:37,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:04:37,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231841123] [2022-11-03 04:04:37,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:37,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:04:37,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:37,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:04:37,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:04:37,024 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 04:04:37,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:37,176 INFO L93 Difference]: Finished difference Result 1146 states and 1307 transitions. [2022-11-03 04:04:37,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 04:04:37,176 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 04:04:37,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:37,177 INFO L225 Difference]: With dead ends: 1146 [2022-11-03 04:04:37,177 INFO L226 Difference]: Without dead ends: 616 [2022-11-03 04:04:37,178 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 04:04:37,178 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 140 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:37,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 309 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-03 04:04:37,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-11-03 04:04:37,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 552. [2022-11-03 04:04:37,214 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 04:04:37,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 629 transitions. [2022-11-03 04:04:37,215 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 629 transitions. Word has length 110 [2022-11-03 04:04:37,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:37,215 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 629 transitions. [2022-11-03 04:04:37,215 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 04:04:37,215 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 629 transitions. [2022-11-03 04:04:37,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 04:04:37,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:37,216 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 04:04:37,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:37,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:04:37,430 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:37,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:37,431 INFO L85 PathProgramCache]: Analyzing trace with hash -969864345, now seen corresponding path program 1 times [2022-11-03 04:04:37,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:37,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971608580] [2022-11-03 04:04:37,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:37,432 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:37,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:37,433 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:37,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-03 04:04:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:37,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:04:37,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:37,715 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 04:04:37,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:04:37,716 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:37,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971608580] [2022-11-03 04:04:37,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971608580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:37,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:04:37,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:04:37,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203459688] [2022-11-03 04:04:37,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:37,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:04:37,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:37,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:04:37,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:04:37,717 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 04:04:37,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:37,853 INFO L93 Difference]: Finished difference Result 1107 states and 1262 transitions. [2022-11-03 04:04:37,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 04:04:37,854 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 04:04:37,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:37,856 INFO L225 Difference]: With dead ends: 1107 [2022-11-03 04:04:37,856 INFO L226 Difference]: Without dead ends: 575 [2022-11-03 04:04:37,857 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 04:04:37,857 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 138 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:37,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 266 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-11-03 04:04:37,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-11-03 04:04:37,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 544. [2022-11-03 04:04:37,896 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 04:04:37,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 620 transitions. [2022-11-03 04:04:37,897 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 620 transitions. Word has length 110 [2022-11-03 04:04:37,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:37,897 INFO L495 AbstractCegarLoop]: Abstraction has 544 states and 620 transitions. [2022-11-03 04:04:37,897 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 04:04:37,897 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 620 transitions. [2022-11-03 04:04:37,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 04:04:37,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:37,899 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 04:04:37,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:38,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:04:38,099 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:38,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:38,100 INFO L85 PathProgramCache]: Analyzing trace with hash 179896767, now seen corresponding path program 2 times [2022-11-03 04:04:38,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:38,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749131142] [2022-11-03 04:04:38,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:04:38,101 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:38,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:38,102 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:38,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-03 04:04:38,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:04:38,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:04:38,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:04:38,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:38,979 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 04:04:38,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:39,453 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 04:04:39,454 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:39,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749131142] [2022-11-03 04:04:39,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749131142] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:39,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [919336803] [2022-11-03 04:04:39,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:04:39,454 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:39,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:39,456 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:39,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2022-11-03 04:04:39,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:04:39,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:04:39,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:04:39,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:40,276 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 04:04:40,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:40,469 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 04:04:40,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [919336803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:40,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287529989] [2022-11-03 04:04:40,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:04:40,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:40,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:04:40,472 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:04:40,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-03 04:04:40,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:04:40,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:04:40,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:04:40,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:41,177 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 04:04:41,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:41,415 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 04:04:41,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287529989] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:41,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:04:41,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15, 14, 15, 14] total 27 [2022-11-03 04:04:41,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883699857] [2022-11-03 04:04:41,416 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:04:41,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 04:04:41,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:41,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 04:04:41,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-11-03 04:04:41,418 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 04:04:42,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:42,935 INFO L93 Difference]: Finished difference Result 1995 states and 2278 transitions. [2022-11-03 04:04:42,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-03 04:04:42,936 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 04:04:42,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:42,938 INFO L225 Difference]: With dead ends: 1995 [2022-11-03 04:04:42,938 INFO L226 Difference]: Without dead ends: 1471 [2022-11-03 04:04:42,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 633 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=384, Invalid=3038, Unknown=0, NotChecked=0, Total=3422 [2022-11-03 04:04:42,940 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 150 mSDsluCounter, 2195 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 2315 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:42,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 2315 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 174 Unchecked, 0.1s Time] [2022-11-03 04:04:42,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2022-11-03 04:04:43,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 856. [2022-11-03 04:04:43,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 1.145029239766082) internal successors, (979), 855 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:43,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 979 transitions. [2022-11-03 04:04:43,015 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 979 transitions. Word has length 110 [2022-11-03 04:04:43,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:43,015 INFO L495 AbstractCegarLoop]: Abstraction has 856 states and 979 transitions. [2022-11-03 04:04:43,016 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 04:04:43,016 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 979 transitions. [2022-11-03 04:04:43,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 04:04:43,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:43,018 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 04:04:43,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-11-03 04:04:43,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-11-03 04:04:43,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (72)] Ended with exit code 0 [2022-11-03 04:04:43,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:43,628 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:43,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:43,629 INFO L85 PathProgramCache]: Analyzing trace with hash 252283325, now seen corresponding path program 2 times [2022-11-03 04:04:43,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:43,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243444956] [2022-11-03 04:04:43,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:04:43,630 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:43,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:43,631 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:43,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-03 04:04:43,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:04:43,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:04:43,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 04:04:43,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:48,695 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 04:04:48,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:55,470 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 04:04:55,470 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:55,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243444956] [2022-11-03 04:04:55,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243444956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:55,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [234814967] [2022-11-03 04:04:55,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:04:55,471 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:55,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:55,471 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:55,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-03 04:04:55,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:04:55,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:04:55,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 04:04:55,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:57,159 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 04:04:57,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:58,136 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 04:04:58,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [234814967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:58,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52843662] [2022-11-03 04:04:58,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:04:58,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:58,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:04:58,138 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:04:58,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-03 04:04:58,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:04:58,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:04:58,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-03 04:04:58,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:59,790 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 17 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:59,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:00,874 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 04:05:00,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52843662] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:00,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:05:00,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38, 38, 39, 39] total 76 [2022-11-03 04:05:00,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338529123] [2022-11-03 04:05:00,875 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:05:00,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-03 04:05:00,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:05:00,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-03 04:05:00,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=5340, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 04:05:00,877 INFO L87 Difference]: Start difference. First operand 856 states and 979 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 04:05:14,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:14,563 INFO L93 Difference]: Finished difference Result 2737 states and 3174 transitions. [2022-11-03 04:05:14,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-03 04:05:14,564 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 04:05:14,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:14,570 INFO L225 Difference]: With dead ends: 2737 [2022-11-03 04:05:14,570 INFO L226 Difference]: Without dead ends: 2735 [2022-11-03 04:05:14,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 582 SyntacticMatches, 6 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3661 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=1295, Invalid=16527, Unknown=0, NotChecked=0, Total=17822 [2022-11-03 04:05:14,573 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 477 mSDsluCounter, 8558 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 8745 SdHoareTripleChecker+Invalid, 3276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3099 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:14,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 8745 Invalid, 3276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 167 Invalid, 0 Unknown, 3099 Unchecked, 0.2s Time] [2022-11-03 04:05:14,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2022-11-03 04:05:14,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 1863. [2022-11-03 04:05:14,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 1.1466165413533835) internal successors, (2135), 1862 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:14,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 2135 transitions. [2022-11-03 04:05:14,706 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 2135 transitions. Word has length 110 [2022-11-03 04:05:14,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:14,707 INFO L495 AbstractCegarLoop]: Abstraction has 1863 states and 2135 transitions. [2022-11-03 04:05:14,707 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 04:05:14,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 2135 transitions. [2022-11-03 04:05:14,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 04:05:14,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:14,709 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 04:05:14,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-11-03 04:05:14,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-03 04:05:15,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Ended with exit code 0 [2022-11-03 04:05:15,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:05:15,310 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:15,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:15,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1869491075, now seen corresponding path program 1 times [2022-11-03 04:05:15,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:05:15,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58821763] [2022-11-03 04:05:15,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:15,312 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:05:15,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:05:15,313 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:05:15,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-03 04:05:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:15,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:05:15,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:16,146 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 04:05:16,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:16,663 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 04:05:16,663 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:05:16,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58821763] [2022-11-03 04:05:16,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58821763] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:16,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2094618990] [2022-11-03 04:05:16,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:16,664 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:05:16,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:05:16,665 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:05:16,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (78)] Waiting until timeout for monitored process [2022-11-03 04:05:17,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:17,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:05:17,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:17,498 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 04:05:17,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:17,700 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 04:05:17,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2094618990] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:17,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931558451] [2022-11-03 04:05:17,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:17,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:17,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:05:17,708 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:05:17,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-11-03 04:05:17,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:17,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:05:17,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:18,327 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 04:05:18,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:18,545 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 04:05:18,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931558451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:18,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:05:18,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15, 14, 15, 14] total 27 [2022-11-03 04:05:18,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349561402] [2022-11-03 04:05:18,546 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:05:18,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 04:05:18,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:05:18,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 04:05:18,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-11-03 04:05:18,548 INFO L87 Difference]: Start difference. First operand 1863 states and 2135 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 04:05:19,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:19,939 INFO L93 Difference]: Finished difference Result 6701 states and 7718 transitions. [2022-11-03 04:05:19,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-03 04:05:19,940 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 04:05:19,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:19,948 INFO L225 Difference]: With dead ends: 6701 [2022-11-03 04:05:19,948 INFO L226 Difference]: Without dead ends: 4858 [2022-11-03 04:05:19,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 632 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=278, Invalid=2692, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 04:05:19,951 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 228 mSDsluCounter, 2053 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 2193 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:19,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 2193 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 137 Unchecked, 0.1s Time] [2022-11-03 04:05:19,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4858 states. [2022-11-03 04:05:20,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4858 to 3798. [2022-11-03 04:05:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3797 states have (on average 1.1572293916249672) internal successors, (4394), 3797 states have internal predecessors, (4394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:20,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 4394 transitions. [2022-11-03 04:05:20,234 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 4394 transitions. Word has length 110 [2022-11-03 04:05:20,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:20,234 INFO L495 AbstractCegarLoop]: Abstraction has 3798 states and 4394 transitions. [2022-11-03 04:05:20,235 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 04:05:20,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 4394 transitions. [2022-11-03 04:05:20,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 04:05:20,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:20,239 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 04:05:20,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-03 04:05:20,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (78)] Forceful destruction successful, exit code 0 [2022-11-03 04:05:20,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-11-03 04:05:20,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:20,853 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:20,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:20,854 INFO L85 PathProgramCache]: Analyzing trace with hash -228796933, now seen corresponding path program 3 times [2022-11-03 04:05:20,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:05:20,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [124098112] [2022-11-03 04:05:20,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:05:20,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:05:20,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:05:20,856 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:05:20,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-03 04:05:21,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 04:05:21,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:05:21,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:05:21,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:21,539 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 04:05:21,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:21,877 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 04:05:21,877 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:05:21,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [124098112] [2022-11-03 04:05:21,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [124098112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:21,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2038721098] [2022-11-03 04:05:21,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:05:21,877 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:05:21,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:05:21,878 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:05:21,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (81)] Waiting until timeout for monitored process [2022-11-03 04:05:22,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 04:05:22,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:05:22,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:05:22,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:22,560 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 04:05:22,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:22,709 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 04:05:22,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2038721098] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:22,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883114548] [2022-11-03 04:05:22,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:05:22,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:22,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:05:22,711 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:05:22,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-11-03 04:05:22,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 04:05:22,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:05:22,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:05:22,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:23,180 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 04:05:23,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:23,331 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 04:05:23,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883114548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:23,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:05:23,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 19 [2022-11-03 04:05:23,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088852245] [2022-11-03 04:05:23,331 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:05:23,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 04:05:23,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:05:23,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 04:05:23,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:05:23,333 INFO L87 Difference]: Start difference. First operand 3798 states and 4394 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 04:05:24,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:24,391 INFO L93 Difference]: Finished difference Result 10848 states and 12628 transitions. [2022-11-03 04:05:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-03 04:05:24,392 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 04:05:24,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:24,402 INFO L225 Difference]: With dead ends: 10848 [2022-11-03 04:05:24,403 INFO L226 Difference]: Without dead ends: 7115 [2022-11-03 04:05:24,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 635 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 04:05:24,406 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 101 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:24,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 1176 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 65 Unchecked, 0.1s Time] [2022-11-03 04:05:24,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7115 states. [2022-11-03 04:05:24,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7115 to 5791. [2022-11-03 04:05:24,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5791 states, 5790 states have (on average 1.153195164075993) internal successors, (6677), 5790 states have internal predecessors, (6677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:24,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5791 states to 5791 states and 6677 transitions. [2022-11-03 04:05:24,886 INFO L78 Accepts]: Start accepts. Automaton has 5791 states and 6677 transitions. Word has length 110 [2022-11-03 04:05:24,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:24,887 INFO L495 AbstractCegarLoop]: Abstraction has 5791 states and 6677 transitions. [2022-11-03 04:05:24,887 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 04:05:24,887 INFO L276 IsEmpty]: Start isEmpty. Operand 5791 states and 6677 transitions. [2022-11-03 04:05:24,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 04:05:24,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:24,893 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 04:05:24,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-11-03 04:05:25,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Forceful destruction successful, exit code 0 [2022-11-03 04:05:25,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (81)] Forceful destruction successful, exit code 0 [2022-11-03 04:05:25,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:05:25,508 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:25,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:25,509 INFO L85 PathProgramCache]: Analyzing trace with hash 420136513, now seen corresponding path program 2 times [2022-11-03 04:05:25,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:05:25,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296622961] [2022-11-03 04:05:25,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:05:25,509 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:05:25,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:05:25,511 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:05:25,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-03 04:05:25,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:05:25,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:05:25,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 04:05:25,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:30,683 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 04:05:30,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:38,079 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 04:05:38,080 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:05:38,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296622961] [2022-11-03 04:05:38,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296622961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:38,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [54930295] [2022-11-03 04:05:38,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:05:38,082 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:05:38,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:05:38,084 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:05:38,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (84)] Waiting until timeout for monitored process [2022-11-03 04:05:38,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:05:38,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:05:38,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-03 04:05:38,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:39,908 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 04:05:39,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:40,931 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 04:05:40,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [54930295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:40,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250641830] [2022-11-03 04:05:40,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:05:40,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:40,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:05:40,936 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:05:40,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-11-03 04:05:41,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:05:41,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:05:41,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-03 04:05:41,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:42,758 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 17 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:42,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:43,896 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 04:05:43,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250641830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:43,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:05:43,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38, 38, 39, 39] total 76 [2022-11-03 04:05:43,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709939699] [2022-11-03 04:05:43,897 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:05:43,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-03 04:05:43,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:05:43,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-03 04:05:43,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=5340, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 04:05:43,899 INFO L87 Difference]: Start difference. First operand 5791 states and 6677 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 04:07:38,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:38,995 INFO L93 Difference]: Finished difference Result 12532 states and 14642 transitions. [2022-11-03 04:07:38,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-11-03 04:07:38,996 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 04:07:38,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:39,015 INFO L225 Difference]: With dead ends: 12532 [2022-11-03 04:07:39,016 INFO L226 Difference]: Without dead ends: 12530 [2022-11-03 04:07:39,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 852 GetRequests, 587 SyntacticMatches, 7 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17865 ImplicationChecksByTransitivity, 123.9s TimeCoverageRelationStatistics Valid=5580, Invalid=61760, Unknown=0, NotChecked=0, Total=67340 [2022-11-03 04:07:39,022 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 562 mSDsluCounter, 15535 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 15885 SdHoareTripleChecker+Invalid, 8969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8821 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:39,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 15885 Invalid, 8969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 145 Invalid, 0 Unknown, 8821 Unchecked, 0.2s Time] [2022-11-03 04:07:39,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12530 states. [2022-11-03 04:07:39,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12530 to 6529. [2022-11-03 04:07:39,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6529 states, 6528 states have (on average 1.1534926470588236) internal successors, (7530), 6528 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:39,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6529 states to 6529 states and 7530 transitions. [2022-11-03 04:07:39,673 INFO L78 Accepts]: Start accepts. Automaton has 6529 states and 7530 transitions. Word has length 110 [2022-11-03 04:07:39,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:39,674 INFO L495 AbstractCegarLoop]: Abstraction has 6529 states and 7530 transitions. [2022-11-03 04:07:39,674 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 04:07:39,674 INFO L276 IsEmpty]: Start isEmpty. Operand 6529 states and 7530 transitions. [2022-11-03 04:07:39,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 04:07:39,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:39,681 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 04:07:39,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (84)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:39,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:40,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:40,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:40,286 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:40,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:40,287 INFO L85 PathProgramCache]: Analyzing trace with hash 492523071, now seen corresponding path program 1 times [2022-11-03 04:07:40,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:40,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [215895237] [2022-11-03 04:07:40,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:40,288 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:40,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:40,289 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:40,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-03 04:07:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:40,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 04:07:40,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:41,273 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 04:07:41,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:41,971 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 04:07:41,971 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:41,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [215895237] [2022-11-03 04:07:41,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [215895237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:41,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [332953223] [2022-11-03 04:07:41,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:41,972 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:41,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:07:41,973 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:07:41,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (87)] Waiting until timeout for monitored process [2022-11-03 04:07:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:42,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 04:07:42,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:42,833 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 04:07:42,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:43,156 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 04:07:43,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [332953223] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:43,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812917696] [2022-11-03 04:07:43,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:43,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:43,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:43,157 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:43,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-11-03 04:07:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:43,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 04:07:43,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:43,824 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 04:07:43,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:44,149 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 04:07:44,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812917696] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:44,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:07:44,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14, 13, 14, 13] total 22 [2022-11-03 04:07:44,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141178414] [2022-11-03 04:07:44,151 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:07:44,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 04:07:44,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:44,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 04:07:44,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-11-03 04:07:44,152 INFO L87 Difference]: Start difference. First operand 6529 states and 7530 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 04:07:54,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:54,398 INFO L93 Difference]: Finished difference Result 18200 states and 20968 transitions. [2022-11-03 04:07:54,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-11-03 04:07:54,398 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 04:07:54,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:54,420 INFO L225 Difference]: With dead ends: 18200 [2022-11-03 04:07:54,420 INFO L226 Difference]: Without dead ends: 14400 [2022-11-03 04:07:54,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 787 GetRequests, 653 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6688 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=3233, Invalid=15127, Unknown=0, NotChecked=0, Total=18360 [2022-11-03 04:07:54,427 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 1445 mSDsluCounter, 2104 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1445 SdHoareTripleChecker+Valid, 2273 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:54,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1445 Valid, 2273 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 04:07:54,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14400 states. [2022-11-03 04:07:55,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14400 to 6660. [2022-11-03 04:07:55,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6660 states, 6659 states have (on average 1.1518245982880313) internal successors, (7670), 6659 states have internal predecessors, (7670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:55,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6660 states to 6660 states and 7670 transitions. [2022-11-03 04:07:55,306 INFO L78 Accepts]: Start accepts. Automaton has 6660 states and 7670 transitions. Word has length 110 [2022-11-03 04:07:55,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:55,307 INFO L495 AbstractCegarLoop]: Abstraction has 6660 states and 7670 transitions. [2022-11-03 04:07:55,307 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 04:07:55,307 INFO L276 IsEmpty]: Start isEmpty. Operand 6660 states and 7670 transitions. [2022-11-03 04:07:55,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 04:07:55,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:55,311 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 04:07:55,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (87)] Ended with exit code 0 [2022-11-03 04:07:55,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-11-03 04:07:55,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Ended with exit code 0 [2022-11-03 04:07:55,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:55,912 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:55,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:55,913 INFO L85 PathProgramCache]: Analyzing trace with hash -805554753, now seen corresponding path program 1 times [2022-11-03 04:07:55,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:55,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287458688] [2022-11-03 04:07:55,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:55,914 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:55,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:55,915 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:55,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-03 04:07:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:56,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 04:07:56,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:56,502 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 04:07:56,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:56,901 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 04:07:56,902 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:56,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1287458688] [2022-11-03 04:07:56,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1287458688] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:56,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1515029718] [2022-11-03 04:07:56,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:56,902 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:56,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:07:56,903 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:07:56,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (90)] Waiting until timeout for monitored process [2022-11-03 04:07:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:57,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 04:07:57,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:57,509 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 04:07:57,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:57,754 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 04:07:57,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1515029718] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:57,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716021761] [2022-11-03 04:07:57,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:57,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:57,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:57,755 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:57,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-11-03 04:07:57,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:57,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 04:07:57,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:58,195 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 04:07:58,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:58,424 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 04:07:58,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716021761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:58,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:07:58,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10, 9, 10, 9] total 14 [2022-11-03 04:07:58,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186633784] [2022-11-03 04:07:58,425 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:07:58,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 04:07:58,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:58,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 04:07:58,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:07:58,426 INFO L87 Difference]: Start difference. First operand 6660 states and 7670 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 04:08:01,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:01,661 INFO L93 Difference]: Finished difference Result 19843 states and 22781 transitions. [2022-11-03 04:08:01,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-03 04:08:01,662 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 04:08:01,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:01,679 INFO L225 Difference]: With dead ends: 19843 [2022-11-03 04:08:01,679 INFO L226 Difference]: Without dead ends: 13248 [2022-11-03 04:08:01,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 650 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=610, Invalid=2042, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 04:08:01,686 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 776 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:01,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [776 Valid, 1003 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 04:08:01,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13248 states. [2022-11-03 04:08:02,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13248 to 7236. [2022-11-03 04:08:02,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7236 states, 7235 states have (on average 1.147892190739461) internal successors, (8305), 7235 states have internal predecessors, (8305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:02,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7236 states to 7236 states and 8305 transitions. [2022-11-03 04:08:02,772 INFO L78 Accepts]: Start accepts. Automaton has 7236 states and 8305 transitions. Word has length 110 [2022-11-03 04:08:02,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:02,772 INFO L495 AbstractCegarLoop]: Abstraction has 7236 states and 8305 transitions. [2022-11-03 04:08:02,772 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 04:08:02,772 INFO L276 IsEmpty]: Start isEmpty. Operand 7236 states and 8305 transitions. [2022-11-03 04:08:02,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 04:08:02,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:02,778 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 04:08:02,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-11-03 04:08:02,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Ended with exit code 0 [2022-11-03 04:08:03,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (90)] Ended with exit code 0 [2022-11-03 04:08:03,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:08:03,379 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:08:03,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:03,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1286635011, now seen corresponding path program 2 times [2022-11-03 04:08:03,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:03,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660492074] [2022-11-03 04:08:03,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:08:03,380 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:03,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:03,381 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:03,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-03 04:08:03,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:08:03,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:03,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 04:08:03,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:13,344 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 04:08:13,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:29,695 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 04:08:29,695 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:29,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660492074] [2022-11-03 04:08:29,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660492074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:29,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [838618388] [2022-11-03 04:08:29,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:08:29,696 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:08:29,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:08:29,697 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:08:29,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (93)] Waiting until timeout for monitored process [2022-11-03 04:08:30,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:08:30,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:30,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-03 04:08:30,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:32,663 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 04:08:32,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:34,519 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 04:08:34,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [838618388] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:34,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94677585] [2022-11-03 04:08:34,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:08:34,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:08:34,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:08:34,521 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:08:34,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-11-03 04:08:34,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:08:34,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:34,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-03 04:08:34,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 17 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:37,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:39,692 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 04:08:39,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94677585] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:39,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:08:39,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38, 38, 39, 39] total 76 [2022-11-03 04:08:39,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388011403] [2022-11-03 04:08:39,693 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:08:39,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-03 04:08:39,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:39,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-03 04:08:39,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=5340, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 04:08:39,695 INFO L87 Difference]: Start difference. First operand 7236 states and 8305 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 04:09:03,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:09:03,682 INFO L93 Difference]: Finished difference Result 11265 states and 13080 transitions. [2022-11-03 04:09:03,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-03 04:09:03,683 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 04:09:03,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:09:03,696 INFO L225 Difference]: With dead ends: 11265 [2022-11-03 04:09:03,696 INFO L226 Difference]: Without dead ends: 11263 [2022-11-03 04:09:03,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 716 GetRequests, 578 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3799 ImplicationChecksByTransitivity, 45.5s TimeCoverageRelationStatistics Valid=1470, Invalid=17436, Unknown=0, NotChecked=0, Total=18906 [2022-11-03 04:09:03,699 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 279 mSDsluCounter, 9305 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 9492 SdHoareTripleChecker+Invalid, 3584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3463 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:09:03,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 9492 Invalid, 3584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 117 Invalid, 0 Unknown, 3463 Unchecked, 0.3s Time] [2022-11-03 04:09:03,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11263 states. [2022-11-03 04:09:04,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11263 to 7971. [2022-11-03 04:09:04,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7971 states, 7970 states have (on average 1.147051442910916) internal successors, (9142), 7970 states have internal predecessors, (9142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:04,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7971 states to 7971 states and 9142 transitions. [2022-11-03 04:09:04,576 INFO L78 Accepts]: Start accepts. Automaton has 7971 states and 9142 transitions. Word has length 110 [2022-11-03 04:09:04,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:09:04,576 INFO L495 AbstractCegarLoop]: Abstraction has 7971 states and 9142 transitions. [2022-11-03 04:09:04,576 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 04:09:04,576 INFO L276 IsEmpty]: Start isEmpty. Operand 7971 states and 9142 transitions. [2022-11-03 04:09:04,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 04:09:04,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:09:04,581 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 04:09:04,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-11-03 04:09:04,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Ended with exit code 0 [2022-11-03 04:09:04,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (93)] Ended with exit code 0 [2022-11-03 04:09:05,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:09:05,188 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:09:05,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:09:05,189 INFO L85 PathProgramCache]: Analyzing trace with hash -585570433, now seen corresponding path program 3 times [2022-11-03 04:09:05,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:09:05,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2048555044] [2022-11-03 04:09:05,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:09:05,189 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:09:05,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:09:05,190 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:09:05,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-03 04:09:05,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 04:09:05,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:09:05,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 04:09:05,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:09:14,252 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 04:09:14,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:09:29,124 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 04:09:29,125 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:09:29,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2048555044] [2022-11-03 04:09:29,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2048555044] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:09:29,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [428834543] [2022-11-03 04:09:29,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:09:29,126 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:09:29,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:09:29,132 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:09:29,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (96)] Waiting until timeout for monitored process [2022-11-03 04:09:29,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 04:09:29,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:09:29,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-03 04:09:29,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:09:32,144 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 04:09:32,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:09:33,882 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 04:09:33,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [428834543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:09:33,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668351723] [2022-11-03 04:09:33,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:09:33,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:09:33,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:09:33,884 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:09:33,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-11-03 04:09:34,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 04:09:34,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:09:34,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-03 04:09:34,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:09:36,861 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 17 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:36,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:09:38,779 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 04:09:38,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668351723] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:09:38,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:09:38,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38, 38, 39, 39] total 76 [2022-11-03 04:09:38,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570762860] [2022-11-03 04:09:38,779 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:09:38,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-03 04:09:38,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:09:38,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-03 04:09:38,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=5340, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 04:09:38,781 INFO L87 Difference]: Start difference. First operand 7971 states and 9142 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 04:10:05,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:05,624 INFO L93 Difference]: Finished difference Result 11211 states and 12991 transitions. [2022-11-03 04:10:05,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-03 04:10:05,624 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 04:10:05,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:05,634 INFO L225 Difference]: With dead ends: 11211 [2022-11-03 04:10:05,634 INFO L226 Difference]: Without dead ends: 11209 [2022-11-03 04:10:05,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 717 GetRequests, 577 SyntacticMatches, 3 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3755 ImplicationChecksByTransitivity, 46.1s TimeCoverageRelationStatistics Valid=1741, Invalid=17441, Unknown=0, NotChecked=0, Total=19182 [2022-11-03 04:10:05,638 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 396 mSDsluCounter, 7033 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 7205 SdHoareTripleChecker+Invalid, 3147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2991 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:05,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 7205 Invalid, 3147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 151 Invalid, 0 Unknown, 2991 Unchecked, 0.4s Time] [2022-11-03 04:10:05,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11209 states. [2022-11-03 04:10:06,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11209 to 8025. [2022-11-03 04:10:06,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8025 states, 8024 states have (on average 1.1468095712861415) internal successors, (9202), 8024 states have internal predecessors, (9202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:06,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8025 states to 8025 states and 9202 transitions. [2022-11-03 04:10:06,570 INFO L78 Accepts]: Start accepts. Automaton has 8025 states and 9202 transitions. Word has length 110 [2022-11-03 04:10:06,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:06,571 INFO L495 AbstractCegarLoop]: Abstraction has 8025 states and 9202 transitions. [2022-11-03 04:10:06,571 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 04:10:06,571 INFO L276 IsEmpty]: Start isEmpty. Operand 8025 states and 9202 transitions. [2022-11-03 04:10:06,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 04:10:06,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:06,577 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 04:10:06,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:06,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:06,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (96)] Ended with exit code 0 [2022-11-03 04:10:07,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:10:07,178 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:07,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:07,179 INFO L85 PathProgramCache]: Analyzing trace with hash -638225987, now seen corresponding path program 1 times [2022-11-03 04:10:07,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:07,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [531085236] [2022-11-03 04:10:07,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:07,179 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:07,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:07,180 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:07,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-03 04:10:07,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:07,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 04:10:07,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:16,304 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 04:10:16,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:10:31,427 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 04:10:31,427 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:31,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [531085236] [2022-11-03 04:10:31,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [531085236] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:10:31,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [948208214] [2022-11-03 04:10:31,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:31,428 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:10:31,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:10:31,429 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:10:31,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (99)] Waiting until timeout for monitored process [2022-11-03 04:10:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:31,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-03 04:10:31,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:34,292 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 04:10:34,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:10:36,030 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 04:10:36,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [948208214] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:10:36,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726203916] [2022-11-03 04:10:36,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:36,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:10:36,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:10:36,032 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:10:36,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-11-03 04:10:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:36,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-03 04:10:36,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:39,116 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 17 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:39,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:10:41,000 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 04:10:41,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726203916] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:10:41,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:10:41,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38, 38, 39, 39] total 76 [2022-11-03 04:10:41,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66083178] [2022-11-03 04:10:41,001 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:10:41,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-03 04:10:41,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:41,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-03 04:10:41,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=5340, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 04:10:41,003 INFO L87 Difference]: Start difference. First operand 8025 states and 9202 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 04:12:05,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:05,591 INFO L93 Difference]: Finished difference Result 11725 states and 13537 transitions. [2022-11-03 04:12:05,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-11-03 04:12:05,591 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 04:12:05,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:05,599 INFO L225 Difference]: With dead ends: 11725 [2022-11-03 04:12:05,599 INFO L226 Difference]: Without dead ends: 11723 [2022-11-03 04:12:05,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 773 GetRequests, 578 SyntacticMatches, 2 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8111 ImplicationChecksByTransitivity, 103.8s TimeCoverageRelationStatistics Valid=3519, Invalid=34311, Unknown=0, NotChecked=0, Total=37830 [2022-11-03 04:12:05,602 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 503 mSDsluCounter, 8569 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 8768 SdHoareTripleChecker+Invalid, 5526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5399 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:05,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 8768 Invalid, 5526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 124 Invalid, 0 Unknown, 5399 Unchecked, 0.3s Time] [2022-11-03 04:12:05,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11723 states. [2022-11-03 04:12:06,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11723 to 8492. [2022-11-03 04:12:06,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8492 states, 8491 states have (on average 1.1460369803321164) internal successors, (9731), 8491 states have internal predecessors, (9731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:06,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8492 states to 8492 states and 9731 transitions. [2022-11-03 04:12:06,595 INFO L78 Accepts]: Start accepts. Automaton has 8492 states and 9731 transitions. Word has length 110 [2022-11-03 04:12:06,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:06,596 INFO L495 AbstractCegarLoop]: Abstraction has 8492 states and 9731 transitions. [2022-11-03 04:12:06,596 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 04:12:06,596 INFO L276 IsEmpty]: Start isEmpty. Operand 8492 states and 9731 transitions. [2022-11-03 04:12:06,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 04:12:06,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:06,600 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 04:12:06,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Ended with exit code 0 [2022-11-03 04:12:06,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-11-03 04:12:07,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (99)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:07,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:12:07,201 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:07,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:07,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1118781823, now seen corresponding path program 1 times [2022-11-03 04:12:07,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:07,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1810587830] [2022-11-03 04:12:07,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:07,202 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:07,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:07,203 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:07,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2022-11-03 04:12:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:07,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 04:12:07,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:17,373 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 04:12:17,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:34,410 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 04:12:34,411 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:34,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1810587830] [2022-11-03 04:12:34,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1810587830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:34,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1757942661] [2022-11-03 04:12:34,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:34,411 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:12:34,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:12:34,412 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:12:34,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (102)] Waiting until timeout for monitored process [2022-11-03 04:12:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:34,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-03 04:12:34,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:37,483 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 04:12:37,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:39,299 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 04:12:39,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1757942661] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:39,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619183083] [2022-11-03 04:12:39,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:39,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:12:39,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:12:39,300 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:12:39,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-11-03 04:12:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:39,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-03 04:12:39,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:42,516 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 17 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:42,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:44,559 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 04:12:44,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619183083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:44,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:12:44,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38, 38, 39, 39] total 76 [2022-11-03 04:12:44,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695025941] [2022-11-03 04:12:44,560 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:12:44,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-03 04:12:44,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:44,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-03 04:12:44,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=5340, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 04:12:44,562 INFO L87 Difference]: Start difference. First operand 8492 states and 9731 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 04:13:11,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:11,005 INFO L93 Difference]: Finished difference Result 11822 states and 13676 transitions. [2022-11-03 04:13:11,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-03 04:13:11,005 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 04:13:11,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:11,016 INFO L225 Difference]: With dead ends: 11822 [2022-11-03 04:13:11,017 INFO L226 Difference]: Without dead ends: 11820 [2022-11-03 04:13:11,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 716 GetRequests, 580 SyntacticMatches, 5 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3516 ImplicationChecksByTransitivity, 48.3s TimeCoverageRelationStatistics Valid=1527, Invalid=16029, Unknown=0, NotChecked=0, Total=17556 [2022-11-03 04:13:11,020 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 484 mSDsluCounter, 7235 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 7408 SdHoareTripleChecker+Invalid, 4042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3902 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:11,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 7408 Invalid, 4042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 135 Invalid, 0 Unknown, 3902 Unchecked, 0.4s Time] [2022-11-03 04:13:11,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11820 states. [2022-11-03 04:13:12,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11820 to 8901. [2022-11-03 04:13:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8901 states, 8900 states have (on average 1.1443820224719101) internal successors, (10185), 8900 states have internal predecessors, (10185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:12,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8901 states to 8901 states and 10185 transitions. [2022-11-03 04:13:12,206 INFO L78 Accepts]: Start accepts. Automaton has 8901 states and 10185 transitions. Word has length 110 [2022-11-03 04:13:12,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:12,206 INFO L495 AbstractCegarLoop]: Abstraction has 8901 states and 10185 transitions. [2022-11-03 04:13:12,206 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 04:13:12,207 INFO L276 IsEmpty]: Start isEmpty. Operand 8901 states and 10185 transitions. [2022-11-03 04:13:12,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 04:13:12,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:12,211 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 04:13:12,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (101)] Forceful destruction successful, exit code 0 [2022-11-03 04:13:12,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (102)] Ended with exit code 0 [2022-11-03 04:13:12,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-11-03 04:13:12,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:13:12,824 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:12,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:12,825 INFO L85 PathProgramCache]: Analyzing trace with hash -417717245, now seen corresponding path program 2 times [2022-11-03 04:13:12,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:12,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523537655] [2022-11-03 04:13:12,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:13:12,826 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:12,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:12,827 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:12,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-03 04:13:13,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:13:13,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:13:13,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 04:13:13,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:22,546 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 04:13:22,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:13:39,156 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 04:13:39,157 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:39,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523537655] [2022-11-03 04:13:39,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523537655] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:13:39,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [473741646] [2022-11-03 04:13:39,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:13:39,157 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:13:39,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:13:39,158 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:13:39,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (105)] Waiting until timeout for monitored process [2022-11-03 04:13:39,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:13:39,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:13:39,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-03 04:13:39,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:42,163 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 04:13:42,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:13:43,962 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 04:13:43,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [473741646] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:13:43,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981372706] [2022-11-03 04:13:43,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:13:43,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:13:43,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:13:43,965 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:13:43,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-11-03 04:13:44,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:13:44,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:13:44,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-03 04:13:44,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:47,140 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 17 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:13:47,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:13:49,167 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 04:13:49,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981372706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:13:49,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:13:49,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38, 38, 39, 39] total 76 [2022-11-03 04:13:49,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663071535] [2022-11-03 04:13:49,168 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:13:49,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-03 04:13:49,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:49,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-03 04:13:49,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=5340, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 04:13:49,169 INFO L87 Difference]: Start difference. First operand 8901 states and 10185 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 04:14:17,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:17,601 INFO L93 Difference]: Finished difference Result 11537 states and 13340 transitions. [2022-11-03 04:14:17,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-03 04:14:17,602 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 04:14:17,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:17,608 INFO L225 Difference]: With dead ends: 11537 [2022-11-03 04:14:17,608 INFO L226 Difference]: Without dead ends: 11535 [2022-11-03 04:14:17,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 582 SyntacticMatches, 7 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3944 ImplicationChecksByTransitivity, 49.6s TimeCoverageRelationStatistics Valid=1493, Invalid=17689, Unknown=0, NotChecked=0, Total=19182 [2022-11-03 04:14:17,610 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 447 mSDsluCounter, 7732 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 7893 SdHoareTripleChecker+Invalid, 2567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2426 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:17,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 7893 Invalid, 2567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 2426 Unchecked, 0.4s Time] [2022-11-03 04:14:17,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11535 states. [2022-11-03 04:14:18,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11535 to 8728. [2022-11-03 04:14:18,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8728 states, 8727 states have (on average 1.1455253810014896) internal successors, (9997), 8727 states have internal predecessors, (9997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:18,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8728 states to 8728 states and 9997 transitions. [2022-11-03 04:14:18,552 INFO L78 Accepts]: Start accepts. Automaton has 8728 states and 9997 transitions. Word has length 110 [2022-11-03 04:14:18,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:18,552 INFO L495 AbstractCegarLoop]: Abstraction has 8728 states and 9997 transitions. [2022-11-03 04:14:18,552 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 04:14:18,552 INFO L276 IsEmpty]: Start isEmpty. Operand 8728 states and 9997 transitions. [2022-11-03 04:14:18,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 04:14:18,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:18,556 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 04:14:18,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (105)] Ended with exit code 0 [2022-11-03 04:14:18,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-11-03 04:14:18,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Ended with exit code 0 [2022-11-03 04:14:19,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:19,157 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:19,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:19,158 INFO L85 PathProgramCache]: Analyzing trace with hash -470372799, now seen corresponding path program 1 times [2022-11-03 04:14:19,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:19,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873944466] [2022-11-03 04:14:19,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:19,158 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:19,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:19,159 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:19,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2022-11-03 04:14:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:19,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 04:14:19,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:28,874 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 04:14:28,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:14:45,619 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 04:14:45,619 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:45,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873944466] [2022-11-03 04:14:45,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873944466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:14:45,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1598901639] [2022-11-03 04:14:45,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:45,620 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:14:45,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:14:45,621 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:14:45,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (108)] Waiting until timeout for monitored process [2022-11-03 04:14:46,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:46,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-03 04:14:46,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:48,635 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 04:14:48,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:14:50,456 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 04:14:50,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1598901639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:14:50,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789560100] [2022-11-03 04:14:50,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:50,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:14:50,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:14:50,458 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:14:50,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-11-03 04:14:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:50,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-03 04:14:50,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 17 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:14:53,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:14:55,739 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 04:14:55,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789560100] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:14:55,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:14:55,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38, 38, 39, 39] total 76 [2022-11-03 04:14:55,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13927917] [2022-11-03 04:14:55,740 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:14:55,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-03 04:14:55,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:55,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-03 04:14:55,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=5340, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 04:14:55,742 INFO L87 Difference]: Start difference. First operand 8728 states and 9997 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 04:16:00,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:16:00,523 INFO L93 Difference]: Finished difference Result 11091 states and 12717 transitions. [2022-11-03 04:16:00,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-11-03 04:16:00,523 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 04:16:00,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:16:00,529 INFO L225 Difference]: With dead ends: 11091 [2022-11-03 04:16:00,529 INFO L226 Difference]: Without dead ends: 11089 [2022-11-03 04:16:00,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 585 SyntacticMatches, 21 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8132 ImplicationChecksByTransitivity, 86.1s TimeCoverageRelationStatistics Valid=2181, Invalid=30761, Unknown=0, NotChecked=0, Total=32942 [2022-11-03 04:16:00,531 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 457 mSDsluCounter, 6272 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 6432 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1463 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:16:00,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 6432 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 53 Invalid, 0 Unknown, 1463 Unchecked, 0.2s Time] [2022-11-03 04:16:00,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11089 states. [2022-11-03 04:16:01,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11089 to 9573. [2022-11-03 04:16:01,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9573 states, 9572 states have (on average 1.1427078980359382) internal successors, (10938), 9572 states have internal predecessors, (10938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:01,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9573 states to 9573 states and 10938 transitions. [2022-11-03 04:16:01,642 INFO L78 Accepts]: Start accepts. Automaton has 9573 states and 10938 transitions. Word has length 110 [2022-11-03 04:16:01,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:16:01,642 INFO L495 AbstractCegarLoop]: Abstraction has 9573 states and 10938 transitions. [2022-11-03 04:16:01,643 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 04:16:01,643 INFO L276 IsEmpty]: Start isEmpty. Operand 9573 states and 10938 transitions. [2022-11-03 04:16:01,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 04:16:01,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:16:01,650 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 04:16:01,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (108)] Ended with exit code 0 [2022-11-03 04:16:01,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (107)] Ended with exit code 0 [2022-11-03 04:16:02,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-11-03 04:16:02,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:16:02,251 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:16:02,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:16:02,252 INFO L85 PathProgramCache]: Analyzing trace with hash -257508089, now seen corresponding path program 2 times [2022-11-03 04:16:02,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:16:02,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1097473860] [2022-11-03 04:16:02,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:16:02,253 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:16:02,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:16:02,254 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:16:02,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2022-11-03 04:16:02,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:16:02,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:16:02,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:16:02,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:16:03,106 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 04:16:03,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:16:03,294 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 04:16:03,294 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:16:03,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1097473860] [2022-11-03 04:16:03,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1097473860] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:16:03,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:16:03,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-03 04:16:03,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628722141] [2022-11-03 04:16:03,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:16:03,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:16:03,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:16:03,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:16:03,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:16:03,295 INFO L87 Difference]: Start difference. First operand 9573 states and 10938 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 04:16:04,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:16:04,413 INFO L93 Difference]: Finished difference Result 15922 states and 18334 transitions. [2022-11-03 04:16:04,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:16:04,414 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 04:16:04,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:16:04,418 INFO L225 Difference]: With dead ends: 15922 [2022-11-03 04:16:04,418 INFO L226 Difference]: Without dead ends: 7266 [2022-11-03 04:16:04,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-03 04:16:04,422 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 201 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:16:04,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 185 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:16:04,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7266 states. [2022-11-03 04:16:05,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7266 to 6514. [2022-11-03 04:16:05,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6514 states, 6513 states have (on average 1.1255949639183171) internal successors, (7331), 6513 states have internal predecessors, (7331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:05,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6514 states to 6514 states and 7331 transitions. [2022-11-03 04:16:05,306 INFO L78 Accepts]: Start accepts. Automaton has 6514 states and 7331 transitions. Word has length 145 [2022-11-03 04:16:05,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:16:05,307 INFO L495 AbstractCegarLoop]: Abstraction has 6514 states and 7331 transitions. [2022-11-03 04:16:05,307 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 04:16:05,307 INFO L276 IsEmpty]: Start isEmpty. Operand 6514 states and 7331 transitions. [2022-11-03 04:16:05,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 04:16:05,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:16:05,313 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 04:16:05,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (110)] Forceful destruction successful, exit code 0 [2022-11-03 04:16:05,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:16:05,515 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:16:05,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:16:05,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1208258635, now seen corresponding path program 5 times [2022-11-03 04:16:05,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:16:05,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [351917909] [2022-11-03 04:16:05,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 04:16:05,516 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:16:05,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:16:05,517 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:16:05,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2022-11-03 04:16:05,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:16:05,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:16:05,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:16:05,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:16:06,152 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 04:16:06,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:16:06,152 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:16:06,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [351917909] [2022-11-03 04:16:06,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [351917909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:16:06,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:16:06,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:16:06,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483072694] [2022-11-03 04:16:06,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:16:06,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:16:06,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:16:06,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:16:06,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:16:06,154 INFO L87 Difference]: Start difference. First operand 6514 states and 7331 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 04:16:08,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:16:08,033 INFO L93 Difference]: Finished difference Result 9928 states and 11196 transitions. [2022-11-03 04:16:08,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 04:16:08,034 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 04:16:08,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:16:08,039 INFO L225 Difference]: With dead ends: 9928 [2022-11-03 04:16:08,040 INFO L226 Difference]: Without dead ends: 6280 [2022-11-03 04:16:08,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:16:08,043 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 183 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:16:08,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 238 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:16:08,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6280 states. [2022-11-03 04:16:08,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6280 to 6153. [2022-11-03 04:16:08,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6153 states, 6152 states have (on average 1.1253250975292588) internal successors, (6923), 6152 states have internal predecessors, (6923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:08,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 6923 transitions. [2022-11-03 04:16:08,837 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 6923 transitions. Word has length 145 [2022-11-03 04:16:08,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:16:08,838 INFO L495 AbstractCegarLoop]: Abstraction has 6153 states and 6923 transitions. [2022-11-03 04:16:08,838 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 04:16:08,838 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 6923 transitions. [2022-11-03 04:16:08,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 04:16:08,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:16:08,842 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 04:16:08,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (111)] Ended with exit code 0 [2022-11-03 04:16:09,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:16:09,043 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:16:09,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:16:09,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1332894711, now seen corresponding path program 6 times [2022-11-03 04:16:09,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:16:09,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129394917] [2022-11-03 04:16:09,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 04:16:09,045 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:16:09,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:16:09,046 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:16:09,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2022-11-03 04:16:09,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-03 04:16:09,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:16:09,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:16:09,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:16:10,155 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 04:16:10,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:16:10,446 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 04:16:10,446 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:16:10,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129394917] [2022-11-03 04:16:10,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129394917] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:16:10,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:16:10,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 12 [2022-11-03 04:16:10,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164487260] [2022-11-03 04:16:10,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:16:10,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:16:10,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:16:10,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:16:10,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:16:10,449 INFO L87 Difference]: Start difference. First operand 6153 states and 6923 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 04:16:11,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:16:11,766 INFO L93 Difference]: Finished difference Result 9412 states and 10591 transitions. [2022-11-03 04:16:11,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 04:16:11,767 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 04:16:11,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:16:11,771 INFO L225 Difference]: With dead ends: 9412 [2022-11-03 04:16:11,772 INFO L226 Difference]: Without dead ends: 6278 [2022-11-03 04:16:11,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:16:11,775 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 177 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:16:11,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 244 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:16:11,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6278 states. [2022-11-03 04:16:12,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6278 to 6151. [2022-11-03 04:16:12,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6151 states, 6150 states have (on average 1.1234146341463416) internal successors, (6909), 6150 states have internal predecessors, (6909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:12,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6151 states to 6151 states and 6909 transitions. [2022-11-03 04:16:12,485 INFO L78 Accepts]: Start accepts. Automaton has 6151 states and 6909 transitions. Word has length 145 [2022-11-03 04:16:12,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:16:12,485 INFO L495 AbstractCegarLoop]: Abstraction has 6151 states and 6909 transitions. [2022-11-03 04:16:12,485 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 04:16:12,485 INFO L276 IsEmpty]: Start isEmpty. Operand 6151 states and 6909 transitions. [2022-11-03 04:16:12,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 04:16:12,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:16:12,488 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 04:16:12,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (112)] Forceful destruction successful, exit code 0 [2022-11-03 04:16:12,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:16:12,689 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:16:12,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:16:12,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1083208823, now seen corresponding path program 7 times [2022-11-03 04:16:12,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:16:12,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1483874499] [2022-11-03 04:16:12,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 04:16:12,690 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:16:12,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:16:12,691 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:16:12,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2022-11-03 04:16:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:16:12,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:16:12,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:16:13,365 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 04:16:13,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:16:13,496 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 04:16:13,496 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:16:13,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1483874499] [2022-11-03 04:16:13,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1483874499] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:16:13,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:16:13,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-03 04:16:13,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191019404] [2022-11-03 04:16:13,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:16:13,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:16:13,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:16:13,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:16:13,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:16:13,497 INFO L87 Difference]: Start difference. First operand 6151 states and 6909 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 04:16:14,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:16:14,390 INFO L93 Difference]: Finished difference Result 9178 states and 10300 transitions. [2022-11-03 04:16:14,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:16:14,390 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 04:16:14,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:16:14,394 INFO L225 Difference]: With dead ends: 9178 [2022-11-03 04:16:14,394 INFO L226 Difference]: Without dead ends: 6154 [2022-11-03 04:16:14,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-03 04:16:14,396 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 186 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:16:14,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 167 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:16:14,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6154 states. [2022-11-03 04:16:15,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6154 to 6137. [2022-11-03 04:16:15,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6137 states, 6136 states have (on average 1.121903520208605) internal successors, (6884), 6136 states have internal predecessors, (6884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:15,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6137 states to 6137 states and 6884 transitions. [2022-11-03 04:16:15,075 INFO L78 Accepts]: Start accepts. Automaton has 6137 states and 6884 transitions. Word has length 145 [2022-11-03 04:16:15,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:16:15,075 INFO L495 AbstractCegarLoop]: Abstraction has 6137 states and 6884 transitions. [2022-11-03 04:16:15,075 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 04:16:15,076 INFO L276 IsEmpty]: Start isEmpty. Operand 6137 states and 6884 transitions. [2022-11-03 04:16:15,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 04:16:15,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:16:15,078 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 04:16:15,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (113)] Ended with exit code 0 [2022-11-03 04:16:15,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:16:15,279 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:16:15,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:16:15,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1653239031, now seen corresponding path program 8 times [2022-11-03 04:16:15,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:16:15,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683340346] [2022-11-03 04:16:15,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:16:15,280 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:16:15,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:16:15,281 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:16:15,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2022-11-03 04:16:15,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:16:15,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:16:15,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:16:15,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:16:15,951 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 04:16:15,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:16:16,079 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 04:16:16,079 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:16:16,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683340346] [2022-11-03 04:16:16,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683340346] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:16:16,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:16:16,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-03 04:16:16,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388521450] [2022-11-03 04:16:16,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:16:16,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:16:16,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:16:16,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:16:16,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:16:16,081 INFO L87 Difference]: Start difference. First operand 6137 states and 6884 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 04:16:17,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:16:17,085 INFO L93 Difference]: Finished difference Result 9019 states and 10109 transitions. [2022-11-03 04:16:17,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:16:17,085 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 04:16:17,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:16:17,089 INFO L225 Difference]: With dead ends: 9019 [2022-11-03 04:16:17,089 INFO L226 Difference]: Without dead ends: 6007 [2022-11-03 04:16:17,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-03 04:16:17,091 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 04:16:17,091 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 04:16:17,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6007 states. [2022-11-03 04:16:17,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6007 to 5973. [2022-11-03 04:16:17,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5973 states, 5972 states have (on average 1.1224045545880776) internal successors, (6703), 5972 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:17,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5973 states to 5973 states and 6703 transitions. [2022-11-03 04:16:17,755 INFO L78 Accepts]: Start accepts. Automaton has 5973 states and 6703 transitions. Word has length 145 [2022-11-03 04:16:17,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:16:17,755 INFO L495 AbstractCegarLoop]: Abstraction has 5973 states and 6703 transitions. [2022-11-03 04:16:17,755 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 04:16:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand 5973 states and 6703 transitions. [2022-11-03 04:16:17,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 04:16:17,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:16:17,758 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 04:16:17,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (114)] Ended with exit code 0 [2022-11-03 04:16:17,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:16:17,959 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:16:17,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:16:17,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1153747485, now seen corresponding path program 1 times [2022-11-03 04:16:17,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:16:17,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558352750] [2022-11-03 04:16:17,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:16:17,959 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:16:17,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:16:17,960 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:16:17,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2022-11-03 04:16:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:16:18,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 04:16:18,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:16:25,997 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 04:16:25,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:16:39,976 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 04:16:39,976 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:16:39,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558352750] [2022-11-03 04:16:39,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558352750] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:16:39,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [255162480] [2022-11-03 04:16:39,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:16:39,977 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:16:39,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:16:39,978 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:16:39,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (116)] Waiting until timeout for monitored process [2022-11-03 04:16:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:16:40,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-03 04:16:40,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:16:42,563 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 04:16:42,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:16:44,198 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 04:16:44,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [255162480] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:16:44,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842235506] [2022-11-03 04:16:44,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:16:44,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:16:44,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:16:44,199 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:16:44,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d1754d0-d39a-4260-aa74-402a55e9011f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-11-03 04:16:44,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:16:44,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-03 04:16:44,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:16:47,001 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 114 proven. 96 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 04:16:47,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:16:48,718 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 04:16:48,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842235506] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:16:48,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:16:48,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38, 38, 39, 39] total 76 [2022-11-03 04:16:48,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142757546] [2022-11-03 04:16:48,719 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:16:48,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-03 04:16:48,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:16:48,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-03 04:16:48,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=5340, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 04:16:48,720 INFO L87 Difference]: Start difference. First operand 5973 states and 6703 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)