./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_ball2001.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_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/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_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_ball2001.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/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_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/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 30c8d3298019488dcd7196bee2bc8b40464790a0108d12e9fe9926ac2a94dbfd --- 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 02:34:35,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:34:36,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:34:36,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:34:36,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:34:36,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:34:36,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:34:36,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:34:36,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:34:36,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:34:36,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:34:36,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:34:36,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:34:36,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:34:36,048 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:34:36,049 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:34:36,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:34:36,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:34:36,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:34:36,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:34:36,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:34:36,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:34:36,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:34:36,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:34:36,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:34:36,078 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:34:36,078 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:34:36,079 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:34:36,080 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:34:36,081 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:34:36,081 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:34:36,082 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:34:36,083 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:34:36,083 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:34:36,084 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:34:36,085 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:34:36,085 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:34:36,086 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:34:36,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:34:36,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:34:36,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:34:36,088 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:34:36,110 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:34:36,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:34:36,111 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:34:36,111 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:34:36,112 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:34:36,112 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:34:36,112 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:34:36,112 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:34:36,112 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:34:36,113 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:34:36,113 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:34:36,113 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:34:36,113 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:34:36,114 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:34:36,114 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:34:36,114 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:34:36,114 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:34:36,114 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:34:36,115 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:34:36,115 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:34:36,116 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:34:36,116 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:34:36,116 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:34:36,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:34:36,116 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:34:36,117 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:34:36,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:34:36,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:34:36,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:34:36,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:34:36,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:34:36,118 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:34:36,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:34:36,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:34:36,119 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:34:36,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:34:36,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:34:36,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:34:36,120 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30c8d3298019488dcd7196bee2bc8b40464790a0108d12e9fe9926ac2a94dbfd [2022-11-03 02:34:36,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:34:36,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:34:36,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:34:36,465 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:34:36,466 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:34:36,467 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_ball2001.c [2022-11-03 02:34:36,528 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/data/0733daf8e/7cd3106591d94a4680fcfe18b72b56a5/FLAGad8a6bfc0 [2022-11-03 02:34:37,089 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:34:37,090 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_ball2001.c [2022-11-03 02:34:37,104 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/data/0733daf8e/7cd3106591d94a4680fcfe18b72b56a5/FLAGad8a6bfc0 [2022-11-03 02:34:37,357 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/data/0733daf8e/7cd3106591d94a4680fcfe18b72b56a5 [2022-11-03 02:34:37,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:34:37,363 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:34:37,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:34:37,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:34:37,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:34:37,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:34:37" (1/1) ... [2022-11-03 02:34:37,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@87feead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:37, skipping insertion in model container [2022-11-03 02:34:37,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:34:37" (1/1) ... [2022-11-03 02:34:37,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:34:37,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:34:37,604 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_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_ball2001.c[1107,1120] [2022-11-03 02:34:37,797 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:34:37,800 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:34:37,821 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_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_ball2001.c[1107,1120] [2022-11-03 02:34:37,967 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:34:37,997 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:34:37,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:37 WrapperNode [2022-11-03 02:34:37,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:34:37,998 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:34:37,999 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:34:37,999 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:34:38,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:37" (1/1) ... [2022-11-03 02:34:38,029 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:37" (1/1) ... [2022-11-03 02:34:38,131 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 703 [2022-11-03 02:34:38,132 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:34:38,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:34:38,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:34:38,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:34:38,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:37" (1/1) ... [2022-11-03 02:34:38,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:37" (1/1) ... [2022-11-03 02:34:38,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:37" (1/1) ... [2022-11-03 02:34:38,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:37" (1/1) ... [2022-11-03 02:34:38,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:37" (1/1) ... [2022-11-03 02:34:38,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:37" (1/1) ... [2022-11-03 02:34:38,210 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:37" (1/1) ... [2022-11-03 02:34:38,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:37" (1/1) ... [2022-11-03 02:34:38,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:34:38,235 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:34:38,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:34:38,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:34:38,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:37" (1/1) ... [2022-11-03 02:34:38,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:34:38,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:34:38,271 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:34:38,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:34:38,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:34:38,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:34:38,600 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:34:38,602 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:34:45,750 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:34:47,411 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:34:47,411 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:34:47,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:34:47 BoogieIcfgContainer [2022-11-03 02:34:47,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:34:47,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:34:47,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:34:47,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:34:47,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:34:37" (1/3) ... [2022-11-03 02:34:47,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@158c3808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:34:47, skipping insertion in model container [2022-11-03 02:34:47,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:37" (2/3) ... [2022-11-03 02:34:47,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@158c3808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:34:47, skipping insertion in model container [2022-11-03 02:34:47,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:34:47" (3/3) ... [2022-11-03 02:34:47,423 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.sw_ball2001.c [2022-11-03 02:34:47,441 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:34:47,442 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:34:47,487 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:34:47,494 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;@629c082, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:34:47,494 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:34:47,498 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 02:34:47,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:34:47,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:47,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:34:47,506 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:47,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:47,511 INFO L85 PathProgramCache]: Analyzing trace with hash 5580945, now seen corresponding path program 1 times [2022-11-03 02:34:47,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:47,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760291193] [2022-11-03 02:34:47,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:47,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:34:47,770 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:34:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:34:47,911 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:34:47,913 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:34:47,914 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:34:47,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:34:47,921 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:34:47,925 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:34:47,941 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:34:47,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:34:47 BoogieIcfgContainer [2022-11-03 02:34:47,948 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:34:47,949 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:34:47,949 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:34:47,949 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:34:47,950 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:34:47" (3/4) ... [2022-11-03 02:34:47,953 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:34:47,953 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:34:47,954 INFO L158 Benchmark]: Toolchain (without parser) took 10590.79ms. Allocated memory was 107.0MB in the beginning and 476.1MB in the end (delta: 369.1MB). Free memory was 69.6MB in the beginning and 335.2MB in the end (delta: -265.6MB). Peak memory consumption was 104.5MB. Max. memory is 16.1GB. [2022-11-03 02:34:47,955 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 107.0MB. Free memory is still 86.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:34:47,955 INFO L158 Benchmark]: CACSL2BoogieTranslator took 633.07ms. Allocated memory is still 107.0MB. Free memory was 69.3MB in the beginning and 66.3MB in the end (delta: 3.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 02:34:47,956 INFO L158 Benchmark]: Boogie Procedure Inliner took 133.65ms. Allocated memory is still 107.0MB. Free memory was 66.3MB in the beginning and 53.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 02:34:47,957 INFO L158 Benchmark]: Boogie Preprocessor took 101.21ms. Allocated memory is still 107.0MB. Free memory was 53.8MB in the beginning and 47.5MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 02:34:47,958 INFO L158 Benchmark]: RCFGBuilder took 9179.53ms. Allocated memory was 107.0MB in the beginning and 476.1MB in the end (delta: 369.1MB). Free memory was 47.5MB in the beginning and 366.7MB in the end (delta: -319.2MB). Peak memory consumption was 222.4MB. Max. memory is 16.1GB. [2022-11-03 02:34:47,958 INFO L158 Benchmark]: TraceAbstraction took 532.00ms. Allocated memory is still 476.1MB. Free memory was 365.6MB in the beginning and 335.2MB in the end (delta: 30.4MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2022-11-03 02:34:47,959 INFO L158 Benchmark]: Witness Printer took 4.42ms. Allocated memory is still 476.1MB. Free memory is still 335.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:34:47,961 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 107.0MB. Free memory is still 86.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 633.07ms. Allocated memory is still 107.0MB. Free memory was 69.3MB in the beginning and 66.3MB in the end (delta: 3.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 133.65ms. Allocated memory is still 107.0MB. Free memory was 66.3MB in the beginning and 53.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 101.21ms. Allocated memory is still 107.0MB. Free memory was 53.8MB in the beginning and 47.5MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 9179.53ms. Allocated memory was 107.0MB in the beginning and 476.1MB in the end (delta: 369.1MB). Free memory was 47.5MB in the beginning and 366.7MB in the end (delta: -319.2MB). Peak memory consumption was 222.4MB. Max. memory is 16.1GB. * TraceAbstraction took 532.00ms. Allocated memory is still 476.1MB. Free memory was 365.6MB in the beginning and 335.2MB in the end (delta: 30.4MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Witness Printer took 4.42ms. Allocated memory is still 476.1MB. Free memory is still 335.2MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 79, overapproximation of bitwiseAnd at line 84. 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_31 mask_SORT_31 = (SORT_31)-1 >> (sizeof(SORT_31) * 8 - 3); [L29] const SORT_31 msb_SORT_31 = (SORT_31)1 << (3 - 1); [L31] const SORT_1 var_3 = 0; [L32] const SORT_1 var_9 = 1; [L33] const SORT_31 var_37 = 0; [L34] const SORT_31 var_226 = 1; [L36] SORT_1 input_2; [L38] SORT_1 state_4 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L39] SORT_1 state_13 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L40] SORT_1 state_15 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L41] SORT_1 state_17 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L42] SORT_1 state_19 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L43] SORT_1 state_21 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L44] SORT_1 state_23 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L45] SORT_1 state_25 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L46] SORT_1 state_27 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L47] SORT_1 state_29 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L48] SORT_31 state_32 = __VERIFIER_nondet_uchar() & mask_SORT_31; [L49] SORT_31 state_33 = __VERIFIER_nondet_uchar() & mask_SORT_31; [L50] SORT_31 state_34 = __VERIFIER_nondet_uchar() & mask_SORT_31; [L51] SORT_31 state_35 = __VERIFIER_nondet_uchar() & mask_SORT_31; [L53] SORT_1 init_5_arg_1 = var_3; [L54] state_4 = init_5_arg_1 [L55] SORT_1 init_14_arg_1 = var_9; [L56] state_13 = init_14_arg_1 [L57] SORT_1 init_16_arg_1 = var_3; [L58] state_15 = init_16_arg_1 [L59] SORT_1 init_18_arg_1 = var_3; [L60] state_17 = init_18_arg_1 [L61] SORT_1 init_20_arg_1 = var_3; [L62] state_19 = init_20_arg_1 [L63] SORT_1 init_22_arg_1 = var_3; [L64] state_21 = init_22_arg_1 [L65] SORT_1 init_24_arg_1 = var_3; [L66] state_23 = init_24_arg_1 [L67] SORT_1 init_26_arg_1 = var_3; [L68] state_25 = init_26_arg_1 [L69] SORT_1 init_28_arg_1 = var_3; [L70] state_27 = init_28_arg_1 [L71] SORT_1 init_30_arg_1 = var_9; [L72] state_29 = init_30_arg_1 VAL [init_14_arg_1=1, init_16_arg_1=0, init_18_arg_1=0, init_20_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=1, init_5_arg_1=0, mask_SORT_1=1, mask_SORT_31=7, msb_SORT_1=1, msb_SORT_31=4, state_13=1, state_15=0, state_17=0, state_19=0, state_21=0, state_23=0, state_25=0, state_27=0, state_29=1, state_32=0, state_33=0, state_34=2, state_35=0, state_4=0, var_226=1, var_3=0, var_37=0, var_9=1] [L75] input_2 = __VERIFIER_nondet_uchar() [L78] SORT_1 var_6_arg_0 = state_4; [L79] SORT_1 var_6 = ~var_6_arg_0; [L80] SORT_1 var_10_arg_0 = var_6; [L81] SORT_1 var_10 = ~var_10_arg_0; [L82] SORT_1 var_11_arg_0 = var_9; [L83] SORT_1 var_11_arg_1 = var_10; [L84] SORT_1 var_11 = var_11_arg_0 & var_11_arg_1; [L85] var_11 = var_11 & mask_SORT_1 [L86] SORT_1 bad_12_arg_0 = var_11; [L87] CALL __VERIFIER_assert(!(bad_12_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:34:48,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/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_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/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_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_ball2001.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/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_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/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 30c8d3298019488dcd7196bee2bc8b40464790a0108d12e9fe9926ac2a94dbfd --- 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 02:34:50,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:34:50,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:34:50,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:34:50,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:34:50,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:34:50,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:34:50,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:34:50,209 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:34:50,210 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:34:50,211 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:34:50,212 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:34:50,212 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:34:50,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:34:50,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:34:50,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:34:50,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:34:50,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:34:50,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:34:50,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:34:50,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:34:50,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:34:50,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:34:50,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:34:50,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:34:50,231 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:34:50,231 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:34:50,232 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:34:50,233 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:34:50,234 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:34:50,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:34:50,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:34:50,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:34:50,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:34:50,238 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:34:50,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:34:50,239 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:34:50,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:34:50,240 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:34:50,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:34:50,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:34:50,243 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:34:50,266 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:34:50,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:34:50,270 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:34:50,270 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:34:50,271 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:34:50,271 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:34:50,272 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:34:50,272 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:34:50,272 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:34:50,272 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:34:50,273 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:34:50,274 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:34:50,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:34:50,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:34:50,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:34:50,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:34:50,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:34:50,277 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:34:50,277 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:34:50,277 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:34:50,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:34:50,278 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:34:50,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:34:50,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:34:50,278 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:34:50,279 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:34:50,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:34:50,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:34:50,280 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:34:50,280 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:34:50,280 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:34:50,280 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:34:50,281 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:34:50,281 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:34:50,281 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:34:50,282 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_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30c8d3298019488dcd7196bee2bc8b40464790a0108d12e9fe9926ac2a94dbfd [2022-11-03 02:34:50,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:34:50,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:34:50,691 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:34:50,693 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:34:50,693 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:34:50,695 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_ball2001.c [2022-11-03 02:34:50,769 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/data/54eb979c0/d7badfac02c34649906dd96a37c9d797/FLAG72321f017 [2022-11-03 02:34:51,328 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:34:51,329 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_ball2001.c [2022-11-03 02:34:51,343 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/data/54eb979c0/d7badfac02c34649906dd96a37c9d797/FLAG72321f017 [2022-11-03 02:34:51,648 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/data/54eb979c0/d7badfac02c34649906dd96a37c9d797 [2022-11-03 02:34:51,650 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:34:51,652 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:34:51,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:34:51,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:34:51,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:34:51,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:34:51" (1/1) ... [2022-11-03 02:34:51,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c9e2a42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:51, skipping insertion in model container [2022-11-03 02:34:51,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:34:51" (1/1) ... [2022-11-03 02:34:51,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:34:51,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:34:51,889 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_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_ball2001.c[1107,1120] [2022-11-03 02:34:52,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:34:52,144 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:34:52,159 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_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_ball2001.c[1107,1120] [2022-11-03 02:34:52,277 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:34:52,295 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:34:52,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:52 WrapperNode [2022-11-03 02:34:52,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:34:52,297 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:34:52,297 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:34:52,297 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:34:52,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:52" (1/1) ... [2022-11-03 02:34:52,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:52" (1/1) ... [2022-11-03 02:34:52,381 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 703 [2022-11-03 02:34:52,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:34:52,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:34:52,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:34:52,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:34:52,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:52" (1/1) ... [2022-11-03 02:34:52,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:52" (1/1) ... [2022-11-03 02:34:52,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:52" (1/1) ... [2022-11-03 02:34:52,398 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:52" (1/1) ... [2022-11-03 02:34:52,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:52" (1/1) ... [2022-11-03 02:34:52,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:52" (1/1) ... [2022-11-03 02:34:52,422 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:52" (1/1) ... [2022-11-03 02:34:52,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:52" (1/1) ... [2022-11-03 02:34:52,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:34:52,457 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:34:52,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:34:52,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:34:52,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:52" (1/1) ... [2022-11-03 02:34:52,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:34:52,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:34:52,515 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:34:52,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:34:52,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:34:52,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:34:52,850 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:34:52,852 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:34:53,566 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:34:53,575 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:34:53,575 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:34:53,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:34:53 BoogieIcfgContainer [2022-11-03 02:34:53,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:34:53,583 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:34:53,583 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:34:53,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:34:53,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:34:51" (1/3) ... [2022-11-03 02:34:53,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@639c019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:34:53, skipping insertion in model container [2022-11-03 02:34:53,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:52" (2/3) ... [2022-11-03 02:34:53,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@639c019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:34:53, skipping insertion in model container [2022-11-03 02:34:53,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:34:53" (3/3) ... [2022-11-03 02:34:53,590 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.sw_ball2001.c [2022-11-03 02:34:53,610 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:34:53,610 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:34:53,681 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:34:53,687 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;@577f42de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:34:53,688 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:34:53,692 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 45 states have (on average 1.488888888888889) internal successors, (67), 46 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 02:34:53,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:34:53,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:53,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:34:53,701 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:53,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:53,706 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 02:34:53,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:34:53,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731585630] [2022-11-03 02:34:53,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:53,721 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:34:53,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:34:53,731 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:34:53,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:34:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:53,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:34:53,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:54,091 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 02:34:54,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:34:54,092 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:34:54,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731585630] [2022-11-03 02:34:54,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731585630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:54,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:54,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:34:54,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72531371] [2022-11-03 02:34:54,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:54,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:34:54,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:34:54,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:34:54,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:34:54,135 INFO L87 Difference]: Start difference. First operand has 47 states, 45 states have (on average 1.488888888888889) internal successors, (67), 46 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) 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 02:34:54,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:54,306 INFO L93 Difference]: Finished difference Result 128 states and 192 transitions. [2022-11-03 02:34:54,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:34:54,311 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 02:34:54,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:54,319 INFO L225 Difference]: With dead ends: 128 [2022-11-03 02:34:54,319 INFO L226 Difference]: Without dead ends: 83 [2022-11-03 02:34:54,322 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 02:34:54,326 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 112 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:54,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 162 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:34:54,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-03 02:34:54,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 45. [2022-11-03 02:34:54,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:54,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2022-11-03 02:34:54,362 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 5 [2022-11-03 02:34:54,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:54,362 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2022-11-03 02:34:54,362 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 02:34:54,363 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2022-11-03 02:34:54,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:34:54,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:54,364 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:54,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:54,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:34:54,589 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:54,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:54,589 INFO L85 PathProgramCache]: Analyzing trace with hash 35289217, now seen corresponding path program 1 times [2022-11-03 02:34:54,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:34:54,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937938299] [2022-11-03 02:34:54,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:54,594 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:34:54,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:34:54,599 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:34:54,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:34:55,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:55,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:34:55,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:55,083 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 02:34:55,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:34:55,084 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:34:55,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937938299] [2022-11-03 02:34:55,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937938299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:55,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:55,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:34:55,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055083819] [2022-11-03 02:34:55,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:55,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:34:55,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:34:55,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:34:55,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:34:55,094 INFO L87 Difference]: Start difference. First operand 45 states and 63 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:55,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:55,205 INFO L93 Difference]: Finished difference Result 130 states and 185 transitions. [2022-11-03 02:34:55,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:34:55,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2022-11-03 02:34:55,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:55,209 INFO L225 Difference]: With dead ends: 130 [2022-11-03 02:34:55,211 INFO L226 Difference]: Without dead ends: 89 [2022-11-03 02:34:55,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 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 02:34:55,214 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 108 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:55,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 159 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:34:55,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-03 02:34:55,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 49. [2022-11-03 02:34:55,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 48 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:55,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2022-11-03 02:34:55,234 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 44 [2022-11-03 02:34:55,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:55,234 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2022-11-03 02:34:55,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:55,235 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2022-11-03 02:34:55,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:34:55,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:55,237 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:55,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:55,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:34:55,451 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:55,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:55,452 INFO L85 PathProgramCache]: Analyzing trace with hash -624242305, now seen corresponding path program 1 times [2022-11-03 02:34:55,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:34:55,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [112751651] [2022-11-03 02:34:55,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:55,454 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:34:55,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:34:55,455 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:34:55,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:34:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:55,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:34:55,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:55,866 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 02:34:55,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:34:55,866 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:34:55,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [112751651] [2022-11-03 02:34:55,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [112751651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:55,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:55,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:34:55,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922346945] [2022-11-03 02:34:55,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:55,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:34:55,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:34:55,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:34:55,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:34:55,869 INFO L87 Difference]: Start difference. First operand 49 states and 68 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:55,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:55,970 INFO L93 Difference]: Finished difference Result 144 states and 205 transitions. [2022-11-03 02:34:55,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:34:55,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2022-11-03 02:34:55,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:55,975 INFO L225 Difference]: With dead ends: 144 [2022-11-03 02:34:55,976 INFO L226 Difference]: Without dead ends: 103 [2022-11-03 02:34:55,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 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 02:34:55,979 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 93 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:55,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 172 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:34:55,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-03 02:34:55,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 63. [2022-11-03 02:34:55,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 62 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:55,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 88 transitions. [2022-11-03 02:34:55,995 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 88 transitions. Word has length 44 [2022-11-03 02:34:55,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:55,996 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 88 transitions. [2022-11-03 02:34:55,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:55,996 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 88 transitions. [2022-11-03 02:34:55,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:34:55,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:56,008 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, 1, 1, 1, 1] [2022-11-03 02:34:56,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:56,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:34:56,209 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:56,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:56,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1181196029, now seen corresponding path program 1 times [2022-11-03 02:34:56,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:34:56,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268419096] [2022-11-03 02:34:56,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:56,211 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:34:56,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:34:56,212 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:34:56,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:34:56,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:56,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:34:56,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:56,630 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 02:34:56,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:34:56,630 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:34:56,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268419096] [2022-11-03 02:34:56,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268419096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:56,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:56,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:34:56,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731291338] [2022-11-03 02:34:56,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:56,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:34:56,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:34:56,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:34:56,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:34:56,633 INFO L87 Difference]: Start difference. First operand 63 states and 88 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:56,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:56,760 INFO L93 Difference]: Finished difference Result 163 states and 232 transitions. [2022-11-03 02:34:56,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:34:56,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2022-11-03 02:34:56,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:56,763 INFO L225 Difference]: With dead ends: 163 [2022-11-03 02:34:56,763 INFO L226 Difference]: Without dead ends: 122 [2022-11-03 02:34:56,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 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 02:34:56,764 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 110 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:56,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 214 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:34:56,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-03 02:34:56,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 67. [2022-11-03 02:34:56,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 66 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 02:34:56,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 93 transitions. [2022-11-03 02:34:56,779 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 93 transitions. Word has length 44 [2022-11-03 02:34:56,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:56,780 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 93 transitions. [2022-11-03 02:34:56,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:56,780 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 93 transitions. [2022-11-03 02:34:56,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:34:56,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:56,785 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:56,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:56,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:34:56,985 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:56,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:56,986 INFO L85 PathProgramCache]: Analyzing trace with hash -507747713, now seen corresponding path program 1 times [2022-11-03 02:34:56,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:34:56,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543193264] [2022-11-03 02:34:56,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:56,987 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:34:56,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:34:56,988 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:34:56,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:34:57,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:57,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:34:57,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:57,443 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 02:34:57,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:34:57,444 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:34:57,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543193264] [2022-11-03 02:34:57,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543193264] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:57,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:57,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:34:57,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113941645] [2022-11-03 02:34:57,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:57,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:34:57,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:34:57,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:34:57,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:34:57,449 INFO L87 Difference]: Start difference. First operand 67 states and 93 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:57,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:57,549 INFO L93 Difference]: Finished difference Result 163 states and 231 transitions. [2022-11-03 02:34:57,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:34:57,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2022-11-03 02:34:57,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:57,550 INFO L225 Difference]: With dead ends: 163 [2022-11-03 02:34:57,551 INFO L226 Difference]: Without dead ends: 122 [2022-11-03 02:34:57,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 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 02:34:57,552 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 104 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:57,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 216 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:34:57,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-03 02:34:57,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 69. [2022-11-03 02:34:57,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.3970588235294117) internal successors, (95), 68 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:57,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 95 transitions. [2022-11-03 02:34:57,558 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 95 transitions. Word has length 44 [2022-11-03 02:34:57,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:57,558 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 95 transitions. [2022-11-03 02:34:57,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:57,559 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 95 transitions. [2022-11-03 02:34:57,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:34:57,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:57,560 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:57,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:57,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:34:57,774 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:57,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:57,775 INFO L85 PathProgramCache]: Analyzing trace with hash -2096095615, now seen corresponding path program 1 times [2022-11-03 02:34:57,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:34:57,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2067554218] [2022-11-03 02:34:57,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:57,776 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:34:57,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:34:57,777 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:34:57,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:34:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:58,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:34:58,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:58,216 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 02:34:58,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:34:58,216 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:34:58,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2067554218] [2022-11-03 02:34:58,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2067554218] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:58,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:58,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:34:58,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675996422] [2022-11-03 02:34:58,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:58,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:34:58,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:34:58,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:34:58,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:34:58,219 INFO L87 Difference]: Start difference. First operand 69 states and 95 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:58,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:58,337 INFO L93 Difference]: Finished difference Result 163 states and 230 transitions. [2022-11-03 02:34:58,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:34:58,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2022-11-03 02:34:58,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:58,338 INFO L225 Difference]: With dead ends: 163 [2022-11-03 02:34:58,339 INFO L226 Difference]: Without dead ends: 122 [2022-11-03 02:34:58,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 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 02:34:58,340 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 88 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:58,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 212 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:34:58,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-03 02:34:58,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 75. [2022-11-03 02:34:58,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.3918918918918919) internal successors, (103), 74 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:58,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 103 transitions. [2022-11-03 02:34:58,354 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 103 transitions. Word has length 44 [2022-11-03 02:34:58,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:58,355 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 103 transitions. [2022-11-03 02:34:58,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:58,356 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 103 transitions. [2022-11-03 02:34:58,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:34:58,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:58,357 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:58,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:58,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:34:58,558 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:58,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:58,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1395031037, now seen corresponding path program 1 times [2022-11-03 02:34:58,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:34:58,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103312041] [2022-11-03 02:34:58,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:58,560 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:34:58,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:34:58,561 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:34:58,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:34:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:58,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:34:58,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:58,993 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 02:34:58,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:34:58,994 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:34:58,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103312041] [2022-11-03 02:34:58,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103312041] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:58,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:58,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:34:58,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518874221] [2022-11-03 02:34:58,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:58,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:34:58,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:34:58,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:34:58,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:34:58,998 INFO L87 Difference]: Start difference. First operand 75 states and 103 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:59,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:59,124 INFO L93 Difference]: Finished difference Result 163 states and 229 transitions. [2022-11-03 02:34:59,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:34:59,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2022-11-03 02:34:59,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:59,126 INFO L225 Difference]: With dead ends: 163 [2022-11-03 02:34:59,126 INFO L226 Difference]: Without dead ends: 122 [2022-11-03 02:34:59,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 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 02:34:59,128 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 82 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:59,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 214 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:34:59,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-03 02:34:59,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 77. [2022-11-03 02:34:59,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.381578947368421) internal successors, (105), 76 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 02:34:59,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 105 transitions. [2022-11-03 02:34:59,134 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 105 transitions. Word has length 44 [2022-11-03 02:34:59,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:59,135 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 105 transitions. [2022-11-03 02:34:59,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:59,135 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 105 transitions. [2022-11-03 02:34:59,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:34:59,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:59,136 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:59,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:59,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:34:59,351 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:59,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:59,352 INFO L85 PathProgramCache]: Analyzing trace with hash -714972667, now seen corresponding path program 1 times [2022-11-03 02:34:59,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:34:59,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745204457] [2022-11-03 02:34:59,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:59,353 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:34:59,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:34:59,354 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:34:59,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:34:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:59,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:34:59,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:59,754 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 02:34:59,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:34:59,754 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:34:59,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745204457] [2022-11-03 02:34:59,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745204457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:59,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:59,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:34:59,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358291506] [2022-11-03 02:34:59,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:59,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:34:59,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:34:59,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:34:59,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:34:59,757 INFO L87 Difference]: Start difference. First operand 77 states and 105 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:59,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:59,837 INFO L93 Difference]: Finished difference Result 162 states and 227 transitions. [2022-11-03 02:34:59,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:34:59,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2022-11-03 02:34:59,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:59,839 INFO L225 Difference]: With dead ends: 162 [2022-11-03 02:34:59,839 INFO L226 Difference]: Without dead ends: 121 [2022-11-03 02:34:59,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 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 02:34:59,843 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 70 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:59,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 192 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:34:59,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-03 02:34:59,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 81. [2022-11-03 02:34:59,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.375) internal successors, (110), 80 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:59,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 110 transitions. [2022-11-03 02:34:59,855 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 110 transitions. Word has length 44 [2022-11-03 02:34:59,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:59,855 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 110 transitions. [2022-11-03 02:34:59,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:59,856 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 110 transitions. [2022-11-03 02:34:59,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:34:59,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:59,856 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:59,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:00,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:00,057 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:00,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:00,058 INFO L85 PathProgramCache]: Analyzing trace with hash -716819709, now seen corresponding path program 1 times [2022-11-03 02:35:00,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:00,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318915012] [2022-11-03 02:35:00,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:00,059 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:00,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:00,060 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:00,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:35:00,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:00,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:35:00,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:00,682 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 02:35:00,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:01,081 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 02:35:01,081 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:01,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318915012] [2022-11-03 02:35:01,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318915012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:01,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [232753083] [2022-11-03 02:35:01,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:01,082 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:01,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:35:01,091 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:35:01,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-03 02:35:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:01,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:35:01,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:01,834 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 02:35:01,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:02,079 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 02:35:02,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [232753083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:02,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107662832] [2022-11-03 02:35:02,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:02,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:02,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:02,087 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:02,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:35:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:02,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:35:02,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:02,674 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 02:35:02,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:02,944 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 02:35:02,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107662832] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:02,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:35:02,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 16 [2022-11-03 02:35:02,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222676500] [2022-11-03 02:35:02,946 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:35:02,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:35:02,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:02,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:35:02,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:35:02,948 INFO L87 Difference]: Start difference. First operand 81 states and 110 transitions. Second operand has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:03,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:03,225 INFO L93 Difference]: Finished difference Result 158 states and 215 transitions. [2022-11-03 02:35:03,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:35:03,226 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 0 states have call successors, (0), 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 44 [2022-11-03 02:35:03,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:03,227 INFO L225 Difference]: With dead ends: 158 [2022-11-03 02:35:03,227 INFO L226 Difference]: Without dead ends: 156 [2022-11-03 02:35:03,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 240 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:35:03,229 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 293 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:03,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 503 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 79 Unchecked, 0.1s Time] [2022-11-03 02:35:03,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-11-03 02:35:03,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 118. [2022-11-03 02:35:03,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.3418803418803418) internal successors, (157), 117 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:03,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 157 transitions. [2022-11-03 02:35:03,237 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 157 transitions. Word has length 44 [2022-11-03 02:35:03,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:03,237 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 157 transitions. [2022-11-03 02:35:03,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:03,238 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 157 transitions. [2022-11-03 02:35:03,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:35:03,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:03,239 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:03,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:03,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:03,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:03,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:03,867 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:03,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:03,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1732780421, now seen corresponding path program 1 times [2022-11-03 02:35:03,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:03,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816494310] [2022-11-03 02:35:03,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:03,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:03,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:03,870 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:03,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:35:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:04,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:35:04,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:04,213 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 02:35:04,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:04,214 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:04,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816494310] [2022-11-03 02:35:04,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816494310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:04,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:04,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:35:04,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180573086] [2022-11-03 02:35:04,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:04,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:04,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:04,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:04,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:04,216 INFO L87 Difference]: Start difference. First operand 118 states and 157 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:04,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:04,282 INFO L93 Difference]: Finished difference Result 160 states and 217 transitions. [2022-11-03 02:35:04,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:35:04,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2022-11-03 02:35:04,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:04,283 INFO L225 Difference]: With dead ends: 160 [2022-11-03 02:35:04,284 INFO L226 Difference]: Without dead ends: 85 [2022-11-03 02:35:04,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 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 02:35:04,285 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 94 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:04,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 157 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:04,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-03 02:35:04,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2022-11-03 02:35:04,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.3493975903614457) internal successors, (112), 83 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 02:35:04,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 112 transitions. [2022-11-03 02:35:04,289 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 112 transitions. Word has length 44 [2022-11-03 02:35:04,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:04,289 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 112 transitions. [2022-11-03 02:35:04,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:04,289 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 112 transitions. [2022-11-03 02:35:04,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 02:35:04,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:04,294 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:04,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:04,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:04,495 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:04,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:04,495 INFO L85 PathProgramCache]: Analyzing trace with hash 2020587719, now seen corresponding path program 1 times [2022-11-03 02:35:04,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:04,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843506170] [2022-11-03 02:35:04,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:04,496 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:04,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:04,497 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:04,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:35:04,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:04,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:35:04,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:05,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:06,422 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:06,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843506170] [2022-11-03 02:35:06,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843506170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:06,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1260141541] [2022-11-03 02:35:06,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:06,423 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:06,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:35:06,424 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:35:06,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-03 02:35:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:07,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:35:07,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:35:07,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:07,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1260141541] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:07,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:35:07,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 11 [2022-11-03 02:35:07,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151722335] [2022-11-03 02:35:07,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:07,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:07,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:07,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:07,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:35:07,188 INFO L87 Difference]: Start difference. First operand 84 states and 112 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:07,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:07,341 INFO L93 Difference]: Finished difference Result 201 states and 281 transitions. [2022-11-03 02:35:07,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:35:07,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 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 83 [2022-11-03 02:35:07,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:07,342 INFO L225 Difference]: With dead ends: 201 [2022-11-03 02:35:07,342 INFO L226 Difference]: Without dead ends: 160 [2022-11-03 02:35:07,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:35:07,343 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 265 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:07,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 187 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:07,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-03 02:35:07,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 86. [2022-11-03 02:35:07,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.3411764705882352) internal successors, (114), 85 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:07,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 114 transitions. [2022-11-03 02:35:07,351 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 114 transitions. Word has length 83 [2022-11-03 02:35:07,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:07,353 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 114 transitions. [2022-11-03 02:35:07,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:07,353 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 114 transitions. [2022-11-03 02:35:07,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 02:35:07,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:07,356 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:07,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:07,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:07,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:07,761 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:07,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:07,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1361056197, now seen corresponding path program 1 times [2022-11-03 02:35:07,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:07,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716792067] [2022-11-03 02:35:07,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:07,763 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:07,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:07,764 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:07,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:35:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:08,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:35:08,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:09,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:09,726 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:09,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716792067] [2022-11-03 02:35:09,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716792067] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:09,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1560891393] [2022-11-03 02:35:09,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:09,727 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:09,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:35:09,731 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:35:09,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-03 02:35:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:10,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:35:10,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:10,457 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:35:10,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:10,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1560891393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:10,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:35:10,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 11 [2022-11-03 02:35:10,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255033075] [2022-11-03 02:35:10,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:10,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:10,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:10,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:10,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:35:10,460 INFO L87 Difference]: Start difference. First operand 86 states and 114 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:10,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:10,614 INFO L93 Difference]: Finished difference Result 217 states and 302 transitions. [2022-11-03 02:35:10,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:35:10,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 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 83 [2022-11-03 02:35:10,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:10,615 INFO L225 Difference]: With dead ends: 217 [2022-11-03 02:35:10,615 INFO L226 Difference]: Without dead ends: 174 [2022-11-03 02:35:10,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:35:10,616 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 269 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:10,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 186 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:10,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-03 02:35:10,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 100. [2022-11-03 02:35:10,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.3535353535353536) internal successors, (134), 99 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:10,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 134 transitions. [2022-11-03 02:35:10,621 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 134 transitions. Word has length 83 [2022-11-03 02:35:10,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:10,621 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 134 transitions. [2022-11-03 02:35:10,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:10,621 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 134 transitions. [2022-11-03 02:35:10,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 02:35:10,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:10,622 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:10,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:10,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:11,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:11,033 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:11,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:11,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1128472765, now seen corresponding path program 1 times [2022-11-03 02:35:11,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:11,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220188931] [2022-11-03 02:35:11,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:11,034 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:11,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:11,038 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:11,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:35:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:11,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:35:11,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:11,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:11,839 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:11,839 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:11,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220188931] [2022-11-03 02:35:11,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220188931] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:11,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [540570941] [2022-11-03 02:35:11,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:11,840 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:11,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:35:11,843 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:35:11,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-03 02:35:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:12,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:35:12,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:12,648 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:35:12,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:12,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [540570941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:12,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:35:12,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 02:35:12,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430132860] [2022-11-03 02:35:12,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:12,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:12,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:12,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:12,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:35:12,651 INFO L87 Difference]: Start difference. First operand 100 states and 134 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:12,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:12,788 INFO L93 Difference]: Finished difference Result 249 states and 347 transitions. [2022-11-03 02:35:12,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:35:12,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 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 83 [2022-11-03 02:35:12,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:12,790 INFO L225 Difference]: With dead ends: 249 [2022-11-03 02:35:12,790 INFO L226 Difference]: Without dead ends: 192 [2022-11-03 02:35:12,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:35:12,791 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 279 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:12,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 181 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:12,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-03 02:35:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 118. [2022-11-03 02:35:12,797 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 02:35:12,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 160 transitions. [2022-11-03 02:35:12,798 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 160 transitions. Word has length 83 [2022-11-03 02:35:12,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:12,799 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 160 transitions. [2022-11-03 02:35:12,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:12,799 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 160 transitions. [2022-11-03 02:35:12,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 02:35:12,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:12,801 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:12,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:13,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-11-03 02:35:13,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:13,212 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:13,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:13,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1130319807, now seen corresponding path program 1 times [2022-11-03 02:35:13,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:13,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1109486969] [2022-11-03 02:35:13,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:13,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:13,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:13,215 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:13,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:35:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:13,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:35:13,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:13,807 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:13,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:13,956 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:13,956 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:13,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1109486969] [2022-11-03 02:35:13,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1109486969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:13,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1966128736] [2022-11-03 02:35:13,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:13,957 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:13,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:35:13,958 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:35:13,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-03 02:35:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:14,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:35:14,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:14,948 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:14,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:15,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1966128736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:15,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706383273] [2022-11-03 02:35:15,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:15,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:15,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:15,064 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:15,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 02:35:15,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:15,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:35:15,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:15,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:15,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706383273] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:15,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:35:15,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2022-11-03 02:35:15,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802573886] [2022-11-03 02:35:15,878 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:35:15,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:35:15,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:15,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:35:15,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:35:15,881 INFO L87 Difference]: Start difference. First operand 118 states and 160 transitions. Second operand has 20 states, 20 states have (on average 8.95) internal successors, (179), 20 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:18,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:18,041 INFO L93 Difference]: Finished difference Result 1210 states and 1717 transitions. [2022-11-03 02:35:18,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-03 02:35:18,042 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 8.95) internal successors, (179), 20 states have internal predecessors, (179), 0 states have call successors, (0), 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 83 [2022-11-03 02:35:18,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:18,046 INFO L225 Difference]: With dead ends: 1210 [2022-11-03 02:35:18,046 INFO L226 Difference]: Without dead ends: 1135 [2022-11-03 02:35:18,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1131, Invalid=4419, Unknown=0, NotChecked=0, Total=5550 [2022-11-03 02:35:18,049 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 3999 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3999 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:18,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3999 Valid, 1201 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:35:18,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2022-11-03 02:35:18,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 340. [2022-11-03 02:35:18,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.40117994100295) internal successors, (475), 339 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:18,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 475 transitions. [2022-11-03 02:35:18,066 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 475 transitions. Word has length 83 [2022-11-03 02:35:18,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:18,067 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 475 transitions. [2022-11-03 02:35:18,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.95) internal successors, (179), 20 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:18,067 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 475 transitions. [2022-11-03 02:35:18,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 02:35:18,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:18,068 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:18,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:18,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-11-03 02:35:18,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:18,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:18,686 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:18,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:18,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1044256187, now seen corresponding path program 1 times [2022-11-03 02:35:18,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:18,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916762882] [2022-11-03 02:35:18,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:18,688 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:18,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:18,689 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:18,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:35:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:19,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:35:19,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:19,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:19,508 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:19,508 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:19,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916762882] [2022-11-03 02:35:19,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916762882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:19,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1316685852] [2022-11-03 02:35:19,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:19,524 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:19,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:35:19,525 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:35:19,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-03 02:35:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:20,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:35:20,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:20,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:20,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1316685852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:20,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738505547] [2022-11-03 02:35:20,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:20,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:20,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:20,752 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:20,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-03 02:35:21,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:21,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:35:21,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:21,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:21,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738505547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:21,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:35:21,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2022-11-03 02:35:21,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358723108] [2022-11-03 02:35:21,561 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:35:21,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:35:21,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:21,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:35:21,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:35:21,563 INFO L87 Difference]: Start difference. First operand 340 states and 475 transitions. Second operand has 20 states, 20 states have (on average 9.45) internal successors, (189), 20 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:23,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:23,005 INFO L93 Difference]: Finished difference Result 1857 states and 2601 transitions. [2022-11-03 02:35:23,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-03 02:35:23,005 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 9.45) internal successors, (189), 20 states have internal predecessors, (189), 0 states have call successors, (0), 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 83 [2022-11-03 02:35:23,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:23,012 INFO L225 Difference]: With dead ends: 1857 [2022-11-03 02:35:23,012 INFO L226 Difference]: Without dead ends: 1651 [2022-11-03 02:35:23,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 475 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=646, Invalid=2434, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 02:35:23,014 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 1565 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1565 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:23,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1565 Valid, 938 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 275 Invalid, 0 Unknown, 51 Unchecked, 0.5s Time] [2022-11-03 02:35:23,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2022-11-03 02:35:23,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 936. [2022-11-03 02:35:23,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 1.383957219251337) internal successors, (1294), 935 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:23,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1294 transitions. [2022-11-03 02:35:23,057 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1294 transitions. Word has length 83 [2022-11-03 02:35:23,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:23,057 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1294 transitions. [2022-11-03 02:35:23,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.45) internal successors, (189), 20 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:23,058 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1294 transitions. [2022-11-03 02:35:23,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 02:35:23,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:23,060 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:23,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:23,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:23,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-11-03 02:35:23,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:23,675 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:23,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:23,676 INFO L85 PathProgramCache]: Analyzing trace with hash 336866761, now seen corresponding path program 1 times [2022-11-03 02:35:23,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:23,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1010614288] [2022-11-03 02:35:23,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:23,676 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:23,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:23,678 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:23,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:35:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:24,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:35:24,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:24,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:25,484 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:25,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1010614288] [2022-11-03 02:35:25,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1010614288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:25,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1640625161] [2022-11-03 02:35:25,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:25,484 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:25,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:35:25,485 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:35:25,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 02:35:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:26,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:35:26,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:26,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:27,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1640625161] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:27,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842737806] [2022-11-03 02:35:27,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:27,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:27,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:27,126 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:27,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-03 02:35:27,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:27,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 02:35:27,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:27,891 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:27,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:28,473 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:28,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842737806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:28,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:35:28,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 16, 16] total 30 [2022-11-03 02:35:28,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734800860] [2022-11-03 02:35:28,474 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:35:28,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 02:35:28,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:28,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 02:35:28,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:35:28,476 INFO L87 Difference]: Start difference. First operand 936 states and 1294 transitions. Second operand has 30 states, 30 states have (on average 5.6) internal successors, (168), 30 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:29,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:29,130 INFO L93 Difference]: Finished difference Result 1835 states and 2529 transitions. [2022-11-03 02:35:29,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 02:35:29,130 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.6) internal successors, (168), 30 states have internal predecessors, (168), 0 states have call successors, (0), 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 83 [2022-11-03 02:35:29,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:29,136 INFO L225 Difference]: With dead ends: 1835 [2022-11-03 02:35:29,136 INFO L226 Difference]: Without dead ends: 1833 [2022-11-03 02:35:29,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 457 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=284, Invalid=1608, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 02:35:29,138 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 305 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:29,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 867 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 228 Unchecked, 0.2s Time] [2022-11-03 02:35:29,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2022-11-03 02:35:29,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1334. [2022-11-03 02:35:29,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 1.355588897224306) internal successors, (1807), 1333 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:29,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1807 transitions. [2022-11-03 02:35:29,179 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1807 transitions. Word has length 83 [2022-11-03 02:35:29,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:29,179 INFO L495 AbstractCegarLoop]: Abstraction has 1334 states and 1807 transitions. [2022-11-03 02:35:29,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.6) internal successors, (168), 30 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:29,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1807 transitions. [2022-11-03 02:35:29,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 02:35:29,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:29,182 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:29,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:29,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2022-11-03 02:35:29,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-11-03 02:35:29,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:29,803 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:29,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:29,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1642407121, now seen corresponding path program 1 times [2022-11-03 02:35:29,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:29,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700450248] [2022-11-03 02:35:29,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:29,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:29,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:29,805 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:29,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 02:35:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:30,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:35:30,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:31,032 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:31,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:31,436 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:31,436 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:31,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700450248] [2022-11-03 02:35:31,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700450248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:31,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [636699371] [2022-11-03 02:35:31,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:31,437 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:31,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:35:31,439 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:35:31,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-03 02:35:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:32,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:35:32,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:32,179 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:35:32,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:32,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [636699371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:32,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:35:32,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-03 02:35:32,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745926840] [2022-11-03 02:35:32,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:32,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:32,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:32,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:32,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:35:32,181 INFO L87 Difference]: Start difference. First operand 1334 states and 1807 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:32,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:32,372 INFO L93 Difference]: Finished difference Result 2702 states and 3645 transitions. [2022-11-03 02:35:32,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:35:32,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 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 83 [2022-11-03 02:35:32,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:32,379 INFO L225 Difference]: With dead ends: 2702 [2022-11-03 02:35:32,379 INFO L226 Difference]: Without dead ends: 2220 [2022-11-03 02:35:32,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:35:32,382 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 157 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:32,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 261 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:32,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2022-11-03 02:35:32,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 1334. [2022-11-03 02:35:32,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 1.342085521380345) internal successors, (1789), 1333 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:32,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1789 transitions. [2022-11-03 02:35:32,448 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1789 transitions. Word has length 83 [2022-11-03 02:35:32,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:32,448 INFO L495 AbstractCegarLoop]: Abstraction has 1334 states and 1789 transitions. [2022-11-03 02:35:32,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:32,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1789 transitions. [2022-11-03 02:35:32,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 02:35:32,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:32,452 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:32,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:32,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:32,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:32,857 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:32,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:32,857 INFO L85 PathProgramCache]: Analyzing trace with hash 798401619, now seen corresponding path program 1 times [2022-11-03 02:35:32,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:32,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311804261] [2022-11-03 02:35:32,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:32,858 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:32,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:32,859 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:32,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 02:35:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:33,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:35:33,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:34,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:34,465 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:34,466 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:34,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311804261] [2022-11-03 02:35:34,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311804261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:34,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1168681925] [2022-11-03 02:35:34,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:34,467 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:34,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:35:34,468 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:35:34,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-03 02:35:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:35,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:35:35,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:35:35,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:35,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1168681925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:35,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:35:35,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-03 02:35:35,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140028330] [2022-11-03 02:35:35,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:35,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:35,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:35,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:35,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:35:35,192 INFO L87 Difference]: Start difference. First operand 1334 states and 1789 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:35,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:35,375 INFO L93 Difference]: Finished difference Result 2142 states and 2928 transitions. [2022-11-03 02:35:35,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:35:35,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 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 83 [2022-11-03 02:35:35,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:35,381 INFO L225 Difference]: With dead ends: 2142 [2022-11-03 02:35:35,381 INFO L226 Difference]: Without dead ends: 1688 [2022-11-03 02:35:35,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:35:35,383 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 154 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 262 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 02:35:35,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 262 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:35,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2022-11-03 02:35:35,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1334. [2022-11-03 02:35:35,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 1.3285821455363842) internal successors, (1771), 1333 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:35,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1771 transitions. [2022-11-03 02:35:35,427 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1771 transitions. Word has length 83 [2022-11-03 02:35:35,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:35,427 INFO L495 AbstractCegarLoop]: Abstraction has 1334 states and 1771 transitions. [2022-11-03 02:35:35,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:35,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1771 transitions. [2022-11-03 02:35:35,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 02:35:35,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:35,430 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:35,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:35,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:35,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:35,835 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:35,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:35,835 INFO L85 PathProgramCache]: Analyzing trace with hash 726015061, now seen corresponding path program 1 times [2022-11-03 02:35:35,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:35,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [821375184] [2022-11-03 02:35:35,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:35,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:35,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:35,837 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:35,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 02:35:36,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:36,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:35:36,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:36,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:37,438 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:37,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [821375184] [2022-11-03 02:35:37,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [821375184] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:37,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1727489178] [2022-11-03 02:35:37,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:37,438 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:37,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:35:37,439 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:35:37,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-03 02:35:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:38,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:35:38,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:35:38,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:38,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1727489178] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:38,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:35:38,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-03 02:35:38,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937987761] [2022-11-03 02:35:38,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:38,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:38,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:38,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:38,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:35:38,146 INFO L87 Difference]: Start difference. First operand 1334 states and 1771 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:38,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:38,341 INFO L93 Difference]: Finished difference Result 2086 states and 2820 transitions. [2022-11-03 02:35:38,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:35:38,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 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 83 [2022-11-03 02:35:38,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:38,346 INFO L225 Difference]: With dead ends: 2086 [2022-11-03 02:35:38,346 INFO L226 Difference]: Without dead ends: 1660 [2022-11-03 02:35:38,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:35:38,348 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 151 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:38,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 263 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:38,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2022-11-03 02:35:38,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 1334. [2022-11-03 02:35:38,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 1.315078769692423) internal successors, (1753), 1333 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:38,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1753 transitions. [2022-11-03 02:35:38,386 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1753 transitions. Word has length 83 [2022-11-03 02:35:38,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:38,386 INFO L495 AbstractCegarLoop]: Abstraction has 1334 states and 1753 transitions. [2022-11-03 02:35:38,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:38,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1753 transitions. [2022-11-03 02:35:38,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 02:35:38,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:38,389 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:38,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:38,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-03 02:35:38,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:38,794 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:38,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:38,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1427614935, now seen corresponding path program 1 times [2022-11-03 02:35:38,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:38,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750146156] [2022-11-03 02:35:38,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:38,795 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:38,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:38,796 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:38,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 02:35:39,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:39,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:35:39,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:39,957 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:39,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:40,336 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:40,336 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:40,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750146156] [2022-11-03 02:35:40,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750146156] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:40,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1592139876] [2022-11-03 02:35:40,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:40,337 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:40,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:35:40,338 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:35:40,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-03 02:35:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:40,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:35:40,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:35:41,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:41,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1592139876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:41,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:35:41,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-03 02:35:41,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929297040] [2022-11-03 02:35:41,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:41,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:41,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:41,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:41,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:35:41,068 INFO L87 Difference]: Start difference. First operand 1334 states and 1753 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:41,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:41,241 INFO L93 Difference]: Finished difference Result 2694 states and 3519 transitions. [2022-11-03 02:35:41,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:35:41,242 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 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 83 [2022-11-03 02:35:41,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:41,245 INFO L225 Difference]: With dead ends: 2694 [2022-11-03 02:35:41,246 INFO L226 Difference]: Without dead ends: 2296 [2022-11-03 02:35:41,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:35:41,247 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 148 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:41,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 264 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:41,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2022-11-03 02:35:41,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1334. [2022-11-03 02:35:41,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 1.3015753938484622) internal successors, (1735), 1333 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:41,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1735 transitions. [2022-11-03 02:35:41,288 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1735 transitions. Word has length 83 [2022-11-03 02:35:41,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:41,289 INFO L495 AbstractCegarLoop]: Abstraction has 1334 states and 1735 transitions. [2022-11-03 02:35:41,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:41,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1735 transitions. [2022-11-03 02:35:41,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 02:35:41,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:41,292 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:41,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:41,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-11-03 02:35:41,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:41,696 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:41,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:41,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1481148967, now seen corresponding path program 1 times [2022-11-03 02:35:41,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:41,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686195708] [2022-11-03 02:35:41,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:41,698 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:41,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:41,698 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:41,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 02:35:42,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:42,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:35:42,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:42,910 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:42,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:43,295 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:43,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686195708] [2022-11-03 02:35:43,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686195708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:43,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1794970259] [2022-11-03 02:35:43,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:43,295 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:43,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:35:43,296 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:35:43,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-03 02:35:43,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:43,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:35:43,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:35:44,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:44,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1794970259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:44,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:35:44,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-03 02:35:44,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379528648] [2022-11-03 02:35:44,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:44,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:44,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:44,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:44,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:35:44,011 INFO L87 Difference]: Start difference. First operand 1334 states and 1735 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:44,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:44,183 INFO L93 Difference]: Finished difference Result 1974 states and 2604 transitions. [2022-11-03 02:35:44,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:35:44,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 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 83 [2022-11-03 02:35:44,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:44,188 INFO L225 Difference]: With dead ends: 1974 [2022-11-03 02:35:44,188 INFO L226 Difference]: Without dead ends: 1604 [2022-11-03 02:35:44,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:35:44,190 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 145 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:44,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 265 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:44,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2022-11-03 02:35:44,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1334. [2022-11-03 02:35:44,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 1.288072018004501) internal successors, (1717), 1333 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:44,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1717 transitions. [2022-11-03 02:35:44,229 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1717 transitions. Word has length 83 [2022-11-03 02:35:44,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:44,229 INFO L495 AbstractCegarLoop]: Abstraction has 1334 states and 1717 transitions. [2022-11-03 02:35:44,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:44,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1717 transitions. [2022-11-03 02:35:44,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 02:35:44,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:44,232 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:44,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-03 02:35:44,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-11-03 02:35:44,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:44,649 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:44,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:44,649 INFO L85 PathProgramCache]: Analyzing trace with hash 442079067, now seen corresponding path program 1 times [2022-11-03 02:35:44,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:44,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959258019] [2022-11-03 02:35:44,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:44,650 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:44,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:44,651 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:44,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 02:35:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:45,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:35:45,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:45,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:46,145 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:46,146 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:46,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959258019] [2022-11-03 02:35:46,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959258019] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:46,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [761362122] [2022-11-03 02:35:46,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:46,146 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:46,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:35:46,147 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:35:46,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-03 02:35:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:46,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:35:46,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:35:46,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:46,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [761362122] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:46,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:35:46,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-03 02:35:46,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251561204] [2022-11-03 02:35:46,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:46,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:46,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:46,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:46,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:35:46,898 INFO L87 Difference]: Start difference. First operand 1334 states and 1717 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:47,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:47,068 INFO L93 Difference]: Finished difference Result 2086 states and 2671 transitions. [2022-11-03 02:35:47,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:35:47,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 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 83 [2022-11-03 02:35:47,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:47,074 INFO L225 Difference]: With dead ends: 2086 [2022-11-03 02:35:47,074 INFO L226 Difference]: Without dead ends: 1744 [2022-11-03 02:35:47,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:35:47,075 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 142 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:47,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 266 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:47,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2022-11-03 02:35:47,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 1334. [2022-11-03 02:35:47,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 1.2745686421605402) internal successors, (1699), 1333 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:47,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1699 transitions. [2022-11-03 02:35:47,113 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1699 transitions. Word has length 83 [2022-11-03 02:35:47,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:47,114 INFO L495 AbstractCegarLoop]: Abstraction has 1334 states and 1699 transitions. [2022-11-03 02:35:47,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:47,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1699 transitions. [2022-11-03 02:35:47,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 02:35:47,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:47,117 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:47,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-03 02:35:47,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:47,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:47,533 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:47,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:47,534 INFO L85 PathProgramCache]: Analyzing trace with hash 582627677, now seen corresponding path program 1 times [2022-11-03 02:35:47,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:47,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518313224] [2022-11-03 02:35:47,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:47,535 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:47,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:47,536 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:47,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 02:35:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:47,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:35:47,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:48,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:49,075 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:49,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518313224] [2022-11-03 02:35:49,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518313224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:49,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [727674704] [2022-11-03 02:35:49,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:49,076 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:49,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:35:49,083 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:35:49,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-03 02:35:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:49,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:35:49,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:35:49,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:49,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [727674704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:49,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:35:49,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-03 02:35:49,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704970229] [2022-11-03 02:35:49,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:49,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:49,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:49,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:49,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:35:49,815 INFO L87 Difference]: Start difference. First operand 1334 states and 1699 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:49,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:49,998 INFO L93 Difference]: Finished difference Result 2540 states and 3231 transitions. [2022-11-03 02:35:49,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:35:49,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 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 83 [2022-11-03 02:35:49,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:50,002 INFO L225 Difference]: With dead ends: 2540 [2022-11-03 02:35:50,002 INFO L226 Difference]: Without dead ends: 2306 [2022-11-03 02:35:50,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:35:50,003 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 131 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:50,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 289 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:50,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2022-11-03 02:35:50,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 1334. [2022-11-03 02:35:50,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 1.2670667666916728) internal successors, (1689), 1333 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:50,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1689 transitions. [2022-11-03 02:35:50,071 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1689 transitions. Word has length 83 [2022-11-03 02:35:50,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:50,071 INFO L495 AbstractCegarLoop]: Abstraction has 1334 states and 1689 transitions. [2022-11-03 02:35:50,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:50,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1689 transitions. [2022-11-03 02:35:50,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 02:35:50,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:50,074 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:50,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:50,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2022-11-03 02:35:50,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:50,474 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:50,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:50,475 INFO L85 PathProgramCache]: Analyzing trace with hash -697236001, now seen corresponding path program 1 times [2022-11-03 02:35:50,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:50,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618044802] [2022-11-03 02:35:50,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:50,476 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:50,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:50,477 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:50,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 02:35:50,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:50,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:35:50,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:51,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:52,014 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:52,015 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:52,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618044802] [2022-11-03 02:35:52,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618044802] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:52,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1741802742] [2022-11-03 02:35:52,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:52,015 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:52,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:35:52,023 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:35:52,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-03 02:35:52,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:52,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:35:52,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:53,467 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:53,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:53,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1741802742] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:53,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672767008] [2022-11-03 02:35:53,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:53,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:53,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:53,824 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:53,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-03 02:35:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:54,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:35:54,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:35:54,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:35:55,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672767008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:55,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:35:55,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 10, 10] total 26 [2022-11-03 02:35:55,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532324305] [2022-11-03 02:35:55,351 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:35:55,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:35:55,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:55,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:35:55,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:35:55,353 INFO L87 Difference]: Start difference. First operand 1334 states and 1689 transitions. Second operand has 26 states, 26 states have (on average 9.346153846153847) internal successors, (243), 26 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:56,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:56,279 INFO L93 Difference]: Finished difference Result 1566 states and 1993 transitions. [2022-11-03 02:35:56,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:35:56,281 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 9.346153846153847) internal successors, (243), 26 states have internal predecessors, (243), 0 states have call successors, (0), 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 83 [2022-11-03 02:35:56,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:56,282 INFO L225 Difference]: With dead ends: 1566 [2022-11-03 02:35:56,283 INFO L226 Difference]: Without dead ends: 1042 [2022-11-03 02:35:56,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 466 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:35:56,284 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 254 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:56,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 1020 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 262 Unchecked, 0.2s Time] [2022-11-03 02:35:56,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2022-11-03 02:35:56,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 1023. [2022-11-03 02:35:56,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.279843444227006) internal successors, (1308), 1022 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:56,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1308 transitions. [2022-11-03 02:35:56,318 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1308 transitions. Word has length 83 [2022-11-03 02:35:56,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:56,319 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1308 transitions. [2022-11-03 02:35:56,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.346153846153847) internal successors, (243), 26 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:56,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1308 transitions. [2022-11-03 02:35:56,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 02:35:56,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:56,321 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:56,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:56,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2022-11-03 02:35:56,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-03 02:35:56,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:56,947 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:56,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:56,948 INFO L85 PathProgramCache]: Analyzing trace with hash 282473863, now seen corresponding path program 1 times [2022-11-03 02:35:56,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:56,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976044936] [2022-11-03 02:35:56,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:56,949 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:56,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:56,950 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:56,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 02:35:57,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:57,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:35:57,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:35:57,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:57,369 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:57,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976044936] [2022-11-03 02:35:57,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976044936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:57,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:57,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:35:57,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981510795] [2022-11-03 02:35:57,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:57,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:57,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:57,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:57,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:57,370 INFO L87 Difference]: Start difference. First operand 1023 states and 1308 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:57,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:57,449 INFO L93 Difference]: Finished difference Result 1229 states and 1578 transitions. [2022-11-03 02:35:57,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:35:57,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-11-03 02:35:57,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:57,451 INFO L225 Difference]: With dead ends: 1229 [2022-11-03 02:35:57,451 INFO L226 Difference]: Without dead ends: 657 [2022-11-03 02:35:57,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 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 02:35:57,453 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 78 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:57,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 169 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:57,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-11-03 02:35:57,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 657. [2022-11-03 02:35:57,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 1.2804878048780488) internal successors, (840), 656 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:57,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 840 transitions. [2022-11-03 02:35:57,474 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 840 transitions. Word has length 83 [2022-11-03 02:35:57,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:57,475 INFO L495 AbstractCegarLoop]: Abstraction has 657 states and 840 transitions. [2022-11-03 02:35:57,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:57,475 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 840 transitions. [2022-11-03 02:35:57,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 02:35:57,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:57,477 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:57,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-11-03 02:35:57,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:57,691 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:57,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:57,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1453180611, now seen corresponding path program 1 times [2022-11-03 02:35:57,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:57,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066209058] [2022-11-03 02:35:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:57,693 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:57,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:57,694 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:57,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 02:35:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:58,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 1815 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 02:35:58,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 32 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:58,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:00,968 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 32 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:00,968 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:00,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1066209058] [2022-11-03 02:36:00,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1066209058] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:00,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1979483235] [2022-11-03 02:36:00,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:00,968 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:00,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:36:00,970 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:36:00,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-03 02:36:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:02,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 1815 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 02:36:02,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:02,431 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 32 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:02,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 32 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:02,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1979483235] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:02,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112715195] [2022-11-03 02:36:02,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:02,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:02,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:02,770 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:02,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-03 02:36:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:03,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 1815 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:36:03,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 18 proven. 94 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:36:03,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 89 proven. 23 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:36:04,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112715195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:04,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:36:04,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 10, 9] total 37 [2022-11-03 02:36:04,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360365552] [2022-11-03 02:36:04,053 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:36:04,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 02:36:04,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:04,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 02:36:04,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 02:36:04,055 INFO L87 Difference]: Start difference. First operand 657 states and 840 transitions. Second operand has 37 states, 37 states have (on average 8.864864864864865) internal successors, (328), 37 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:10,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:10,816 INFO L93 Difference]: Finished difference Result 3523 states and 4491 transitions. [2022-11-03 02:36:10,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-11-03 02:36:10,817 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 8.864864864864865) internal successors, (328), 37 states have internal predecessors, (328), 0 states have call successors, (0), 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 122 [2022-11-03 02:36:10,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:10,823 INFO L225 Difference]: With dead ends: 3523 [2022-11-03 02:36:10,823 INFO L226 Difference]: Without dead ends: 3317 [2022-11-03 02:36:10,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 993 GetRequests, 815 SyntacticMatches, 2 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 10547 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=3264, Invalid=28242, Unknown=0, NotChecked=0, Total=31506 [2022-11-03 02:36:10,828 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 2550 mSDsluCounter, 3692 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2550 SdHoareTripleChecker+Valid, 3814 SdHoareTripleChecker+Invalid, 1734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 986 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:10,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2550 Valid, 3814 Invalid, 1734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 663 Invalid, 0 Unknown, 986 Unchecked, 0.8s Time] [2022-11-03 02:36:10,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3317 states. [2022-11-03 02:36:10,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3317 to 1287. [2022-11-03 02:36:10,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 1.3048211508553655) internal successors, (1678), 1286 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:10,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 1678 transitions. [2022-11-03 02:36:10,875 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 1678 transitions. Word has length 122 [2022-11-03 02:36:10,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:10,875 INFO L495 AbstractCegarLoop]: Abstraction has 1287 states and 1678 transitions. [2022-11-03 02:36:10,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 8.864864864864865) internal successors, (328), 37 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:10,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 1678 transitions. [2022-11-03 02:36:10,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 02:36:10,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:10,879 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, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:10,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:11,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-11-03 02:36:11,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:11,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:11,487 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:11,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:11,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1933497153, now seen corresponding path program 1 times [2022-11-03 02:36:11,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:11,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075913841] [2022-11-03 02:36:11,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:11,489 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:11,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:11,489 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:11,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 02:36:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:12,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 1815 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:36:12,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:12,542 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 20 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:12,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 20 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:13,140 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:13,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075913841] [2022-11-03 02:36:13,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075913841] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:13,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [623366579] [2022-11-03 02:36:13,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:13,141 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:13,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:36:13,141 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:36:13,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-03 02:36:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:14,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 1815 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:36:14,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 20 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:14,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:14,845 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 20 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:14,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [623366579] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:14,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754978021] [2022-11-03 02:36:14,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:14,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:14,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:14,847 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:14,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-03 02:36:15,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:15,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 1815 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:36:15,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:15,949 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 20 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:15,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 20 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:16,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754978021] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:16,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:36:16,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 14, 14] total 43 [2022-11-03 02:36:16,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86084570] [2022-11-03 02:36:16,575 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:36:16,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-03 02:36:16,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:16,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-03 02:36:16,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1670, Unknown=0, NotChecked=0, Total=1806 [2022-11-03 02:36:16,577 INFO L87 Difference]: Start difference. First operand 1287 states and 1678 transitions. Second operand has 43 states, 43 states have (on average 7.1395348837209305) internal successors, (307), 43 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:21,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:21,149 INFO L93 Difference]: Finished difference Result 4384 states and 5629 transitions. [2022-11-03 02:36:21,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-03 02:36:21,150 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 7.1395348837209305) internal successors, (307), 43 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2022-11-03 02:36:21,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:21,162 INFO L225 Difference]: With dead ends: 4384 [2022-11-03 02:36:21,162 INFO L226 Difference]: Without dead ends: 4013 [2022-11-03 02:36:21,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 820 GetRequests, 711 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2526 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1678, Invalid=10312, Unknown=0, NotChecked=0, Total=11990 [2022-11-03 02:36:21,168 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 3991 mSDsluCounter, 2797 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3991 SdHoareTripleChecker+Valid, 2956 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 611 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:21,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3991 Valid, 2956 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 688 Invalid, 0 Unknown, 611 Unchecked, 0.9s Time] [2022-11-03 02:36:21,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4013 states. [2022-11-03 02:36:21,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4013 to 2387. [2022-11-03 02:36:21,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2386 states have (on average 1.300083822296731) internal successors, (3102), 2386 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:21,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 3102 transitions. [2022-11-03 02:36:21,240 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 3102 transitions. Word has length 122 [2022-11-03 02:36:21,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:21,241 INFO L495 AbstractCegarLoop]: Abstraction has 2387 states and 3102 transitions. [2022-11-03 02:36:21,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 7.1395348837209305) internal successors, (307), 43 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:21,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 3102 transitions. [2022-11-03 02:36:21,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 02:36:21,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:21,246 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, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:21,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:21,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Ended with exit code 0 [2022-11-03 02:36:21,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-11-03 02:36:21,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:21,866 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:21,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:21,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1660405565, now seen corresponding path program 1 times [2022-11-03 02:36:21,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:21,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005721913] [2022-11-03 02:36:21,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:21,868 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:21,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:21,869 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:21,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-03 02:36:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:22,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 1815 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-03 02:36:22,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:23,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:25,918 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:25,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005721913] [2022-11-03 02:36:25,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005721913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:25,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1953457163] [2022-11-03 02:36:25,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:25,919 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:25,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:36:25,919 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:36:25,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-03 02:36:26,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:27,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 1815 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-03 02:36:27,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:27,730 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:27,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:28,961 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:28,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1953457163] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:28,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475128659] [2022-11-03 02:36:28,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:28,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:28,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:28,967 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:28,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-03 02:36:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:29,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 1815 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:36:29,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 24 proven. 83 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:36:31,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 10 proven. 97 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:36:32,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475128659] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:32,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:36:32,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24, 24, 17, 17] total 69 [2022-11-03 02:36:32,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109226030] [2022-11-03 02:36:32,990 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:36:32,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-03 02:36:32,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:32,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-03 02:36:32,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=4372, Unknown=0, NotChecked=0, Total=4692 [2022-11-03 02:36:32,992 INFO L87 Difference]: Start difference. First operand 2387 states and 3102 transitions. Second operand has 69 states, 69 states have (on average 6.0) internal successors, (414), 69 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:38,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:38,060 INFO L93 Difference]: Finished difference Result 5018 states and 6477 transitions. [2022-11-03 02:36:38,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-03 02:36:38,061 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 6.0) internal successors, (414), 69 states have internal predecessors, (414), 0 states have call successors, (0), 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 122 [2022-11-03 02:36:38,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:38,070 INFO L225 Difference]: With dead ends: 5018 [2022-11-03 02:36:38,070 INFO L226 Difference]: Without dead ends: 5016 [2022-11-03 02:36:38,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 667 SyntacticMatches, 19 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 5491 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1401, Invalid=14099, Unknown=0, NotChecked=0, Total=15500 [2022-11-03 02:36:38,073 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 1036 mSDsluCounter, 2222 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 2277 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1038 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:38,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1036 Valid, 2277 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 185 Invalid, 0 Unknown, 1038 Unchecked, 0.3s Time] [2022-11-03 02:36:38,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5016 states. [2022-11-03 02:36:38,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5016 to 4194. [2022-11-03 02:36:38,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4194 states, 4193 states have (on average 1.307178631051753) internal successors, (5481), 4193 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:38,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4194 states to 4194 states and 5481 transitions. [2022-11-03 02:36:38,184 INFO L78 Accepts]: Start accepts. Automaton has 4194 states and 5481 transitions. Word has length 122 [2022-11-03 02:36:38,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:38,185 INFO L495 AbstractCegarLoop]: Abstraction has 4194 states and 5481 transitions. [2022-11-03 02:36:38,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 6.0) internal successors, (414), 69 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:38,185 INFO L276 IsEmpty]: Start isEmpty. Operand 4194 states and 5481 transitions. [2022-11-03 02:36:38,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 02:36:38,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:38,192 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, 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 02:36:38,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-11-03 02:36:38,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:38,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Ended with exit code 0 [2022-11-03 02:36:38,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:38,807 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:38,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:38,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1600458969, now seen corresponding path program 1 times [2022-11-03 02:36:38,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:38,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099089420] [2022-11-03 02:36:38,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:38,809 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:38,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:38,810 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:38,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-03 02:36:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:39,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 1815 conjuncts, 147 conjunts are in the unsatisfiable core [2022-11-03 02:36:39,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 76 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:43,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 76 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:55,514 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:55,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099089420] [2022-11-03 02:36:55,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099089420] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:55,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [523781092] [2022-11-03 02:36:55,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:55,514 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:55,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:36:55,515 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:36:55,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-03 02:36:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:56,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 1815 conjuncts, 147 conjunts are in the unsatisfiable core [2022-11-03 02:36:56,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:58,476 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 76 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:58,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:09,063 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~var_155_arg_1~0#1_110| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_189_arg_1~0#1_110| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_59_arg_1~0#1_111| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_68_arg_1~0#1_111| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_206_arg_1~0#1_110| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_223_arg_1~0#1_110| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_121_arg_1~0#1_110| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_64_arg_1~0#1_111| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_138_arg_1~0#1_110| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_53_arg_1~0#1_115| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_172_arg_1~0#1_110| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_104_arg_0~0#1_110| (_ BitVec 8))) (not (= ((_ extract 7 0) (let ((.cse0 ((_ zero_extend 24) |c_ULTIMATE.start_main_~mask_SORT_1~0#1|))) (bvand .cse0 ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_223_arg_1~0#1_110|) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_206_arg_1~0#1_110|) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_189_arg_1~0#1_110|) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_155_arg_1~0#1_110|) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_121_arg_1~0#1_110|) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_104_arg_0~0#1_110|) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_27~0#1|) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_68_arg_1~0#1_111|) ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_25~0#1|)))))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_64_arg_1~0#1_111|) ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_23~0#1|))))))))) ((_ zero_extend 24) ((_ extract 7 0) (let ((.cse1 ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_17~0#1|))) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_19~0#1|)))))) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse0 ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_53_arg_1~0#1_115|) .cse1))))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) |c_ULTIMATE.start_main_~next_44_arg_1~0#1|)))) ((_ zero_extend 24) |c_ULTIMATE.start_main_~next_49_arg_1~0#1|)))) ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse0 ((_ zero_extend 24) ((_ extract 7 0) |c_ULTIMATE.start_main_#t~ite18#1|))))))))))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse0 ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_21~0#1|) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_59_arg_1~0#1_111|) .cse1))))))))))))))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) |c_ULTIMATE.start_main_~next_42_arg_1~0#1|)))))))))))))))) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_138_arg_1~0#1_110|))))))) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_172_arg_1~0#1_110|)))))))))))))))) (_ bv0 8)))) is different from false [2022-11-03 02:37:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 76 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-03 02:37:15,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [523781092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:15,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578859742] [2022-11-03 02:37:15,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:15,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:15,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:37:15,420 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:37:15,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-03 02:37:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:15,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 1815 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 02:37:15,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:37:18,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 1 proven. 82 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:37:22,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578859742] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:22,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:37:22,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 26, 10, 10] total 68 [2022-11-03 02:37:22,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977726791] [2022-11-03 02:37:22,522 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:37:22,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-03 02:37:22,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:22,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-03 02:37:22,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=4209, Unknown=3, NotChecked=130, Total=4556 [2022-11-03 02:37:22,524 INFO L87 Difference]: Start difference. First operand 4194 states and 5481 transitions. Second operand has 68 states, 68 states have (on average 5.573529411764706) internal successors, (379), 68 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:31,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:31,256 INFO L93 Difference]: Finished difference Result 6364 states and 8300 transitions. [2022-11-03 02:37:31,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-03 02:37:31,257 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 5.573529411764706) internal successors, (379), 68 states have internal predecessors, (379), 0 states have call successors, (0), 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 122 [2022-11-03 02:37:31,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:31,265 INFO L225 Difference]: With dead ends: 6364 [2022-11-03 02:37:31,265 INFO L226 Difference]: Without dead ends: 5034 [2022-11-03 02:37:31,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 661 SyntacticMatches, 10 SemanticMatches, 101 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1555 ImplicationChecksByTransitivity, 43.6s TimeCoverageRelationStatistics Valid=633, Invalid=9670, Unknown=3, NotChecked=200, Total=10506 [2022-11-03 02:37:31,269 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 213 mSDsluCounter, 3022 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 3093 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 735 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:31,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 3093 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 735 Unchecked, 0.1s Time] [2022-11-03 02:37:31,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5034 states. [2022-11-03 02:37:31,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5034 to 5015. [2022-11-03 02:37:31,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5015 states, 5014 states have (on average 1.3001595532508974) internal successors, (6519), 5014 states have internal predecessors, (6519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:31,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5015 states to 5015 states and 6519 transitions. [2022-11-03 02:37:31,388 INFO L78 Accepts]: Start accepts. Automaton has 5015 states and 6519 transitions. Word has length 122 [2022-11-03 02:37:31,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:31,388 INFO L495 AbstractCegarLoop]: Abstraction has 5015 states and 6519 transitions. [2022-11-03 02:37:31,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 5.573529411764706) internal successors, (379), 68 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:31,389 INFO L276 IsEmpty]: Start isEmpty. Operand 5015 states and 6519 transitions. [2022-11-03 02:37:31,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 02:37:31,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:31,397 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, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:31,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Ended with exit code 0 [2022-11-03 02:37:31,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:31,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-11-03 02:37:32,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:32,011 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:32,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:32,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1714798463, now seen corresponding path program 1 times [2022-11-03 02:37:32,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:32,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499452301] [2022-11-03 02:37:32,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:32,013 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:32,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:32,014 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:32,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-03 02:37:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:32,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 1815 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:37:32,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:33,354 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 82 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:37:33,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 82 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:37:33,746 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:33,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499452301] [2022-11-03 02:37:33,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499452301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:33,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1488339191] [2022-11-03 02:37:33,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:33,746 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:37:33,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:37:33,747 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:37:33,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-03 02:37:34,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:34,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 1815 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:37:34,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 02:37:34,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:37:34,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1488339191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:34,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:37:34,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 11 [2022-11-03 02:37:34,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853647246] [2022-11-03 02:37:34,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:34,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:37:34,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:34,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:37:34,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:37:34,655 INFO L87 Difference]: Start difference. First operand 5015 states and 6519 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 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 02:37:34,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:34,840 INFO L93 Difference]: Finished difference Result 6775 states and 8797 transitions. [2022-11-03 02:37:34,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:37:34,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 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 122 [2022-11-03 02:37:34,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:34,846 INFO L225 Difference]: With dead ends: 6775 [2022-11-03 02:37:34,847 INFO L226 Difference]: Without dead ends: 3669 [2022-11-03 02:37:34,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:37:34,850 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 214 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:34,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 151 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:37:34,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3669 states. [2022-11-03 02:37:34,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3669 to 3593. [2022-11-03 02:37:34,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3593 states, 3592 states have (on average 1.2767260579064588) internal successors, (4586), 3592 states have internal predecessors, (4586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:34,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 4586 transitions. [2022-11-03 02:37:34,962 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 4586 transitions. Word has length 122 [2022-11-03 02:37:34,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:34,962 INFO L495 AbstractCegarLoop]: Abstraction has 3593 states and 4586 transitions. [2022-11-03 02:37:34,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 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 02:37:34,963 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 4586 transitions. [2022-11-03 02:37:34,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 02:37:34,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:34,967 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:34,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-11-03 02:37:35,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (60)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:35,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:37:35,388 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:35,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:35,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1201529727, now seen corresponding path program 1 times [2022-11-03 02:37:35,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:35,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125323933] [2022-11-03 02:37:35,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:35,390 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:35,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:35,391 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:35,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-03 02:37:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:35,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 1815 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:37:35,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 82 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 02:37:36,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:37,052 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 82 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 02:37:37,052 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:37,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125323933] [2022-11-03 02:37:37,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125323933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:37,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [45649862] [2022-11-03 02:37:37,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:37,053 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:37:37,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:37:37,059 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:37:37,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-03 02:37:37,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:37,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 1815 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:37:37,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 02:37:37,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:37:37,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [45649862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:37,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:37:37,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 11 [2022-11-03 02:37:37,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979137188] [2022-11-03 02:37:37,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:37,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:37:37,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:37,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:37:37,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:37:37,953 INFO L87 Difference]: Start difference. First operand 3593 states and 4586 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 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 02:37:38,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:38,115 INFO L93 Difference]: Finished difference Result 5321 states and 6812 transitions. [2022-11-03 02:37:38,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:37:38,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 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 122 [2022-11-03 02:37:38,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:38,121 INFO L225 Difference]: With dead ends: 5321 [2022-11-03 02:37:38,122 INFO L226 Difference]: Without dead ends: 2713 [2022-11-03 02:37:38,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:37:38,124 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 209 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:38,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 148 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:37:38,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2022-11-03 02:37:38,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2652. [2022-11-03 02:37:38,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 2651 states have (on average 1.2599019238023388) internal successors, (3340), 2651 states have internal predecessors, (3340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:38,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 3340 transitions. [2022-11-03 02:37:38,198 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 3340 transitions. Word has length 122 [2022-11-03 02:37:38,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:38,199 INFO L495 AbstractCegarLoop]: Abstraction has 2652 states and 3340 transitions. [2022-11-03 02:37:38,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 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 02:37:38,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 3340 transitions. [2022-11-03 02:37:38,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 02:37:38,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:38,202 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:38,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:38,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 0 [2022-11-03 02:37:38,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:37:38,615 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:38,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:38,615 INFO L85 PathProgramCache]: Analyzing trace with hash -208363325, now seen corresponding path program 1 times [2022-11-03 02:37:38,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:38,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16600553] [2022-11-03 02:37:38,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:38,617 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:38,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:38,617 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:38,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-03 02:37:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:39,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 1815 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:37:39,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:39,186 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-03 02:37:39,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:37:39,186 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:39,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16600553] [2022-11-03 02:37:39,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16600553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:39,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:37:39,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:37:39,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316793223] [2022-11-03 02:37:39,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:39,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:37:39,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:39,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:37:39,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:37:39,192 INFO L87 Difference]: Start difference. First operand 2652 states and 3340 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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 02:37:39,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:39,275 INFO L93 Difference]: Finished difference Result 3755 states and 4787 transitions. [2022-11-03 02:37:39,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:37:39,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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 122 [2022-11-03 02:37:39,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:39,279 INFO L225 Difference]: With dead ends: 3755 [2022-11-03 02:37:39,279 INFO L226 Difference]: Without dead ends: 2114 [2022-11-03 02:37:39,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 119 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 02:37:39,281 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 78 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:39,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 165 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:37:39,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2022-11-03 02:37:39,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 2114. [2022-11-03 02:37:39,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 1.2688121154756271) internal successors, (2681), 2113 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:39,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 2681 transitions. [2022-11-03 02:37:39,341 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 2681 transitions. Word has length 122 [2022-11-03 02:37:39,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:39,342 INFO L495 AbstractCegarLoop]: Abstraction has 2114 states and 2681 transitions. [2022-11-03 02:37:39,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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 02:37:39,342 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 2681 transitions. [2022-11-03 02:37:39,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 02:37:39,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:39,344 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, 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 02:37:39,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:39,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:39,564 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:39,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:39,565 INFO L85 PathProgramCache]: Analyzing trace with hash 428150683, now seen corresponding path program 1 times [2022-11-03 02:37:39,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:39,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159996876] [2022-11-03 02:37:39,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:39,566 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:39,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:39,567 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:39,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-03 02:37:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:40,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 1815 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:37:40,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-03 02:37:40,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:37:40,144 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:40,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159996876] [2022-11-03 02:37:40,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159996876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:40,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:37:40,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:37:40,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776392237] [2022-11-03 02:37:40,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:40,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:37:40,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:40,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:37:40,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:37:40,145 INFO L87 Difference]: Start difference. First operand 2114 states and 2681 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:40,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:40,262 INFO L93 Difference]: Finished difference Result 3597 states and 4592 transitions. [2022-11-03 02:37:40,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:37:40,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 122 [2022-11-03 02:37:40,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:40,266 INFO L225 Difference]: With dead ends: 3597 [2022-11-03 02:37:40,266 INFO L226 Difference]: Without dead ends: 1892 [2022-11-03 02:37:40,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 119 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 02:37:40,270 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 78 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:40,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 163 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:37:40,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2022-11-03 02:37:40,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1892. [2022-11-03 02:37:40,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 1.2702273929138022) internal successors, (2402), 1891 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:40,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 2402 transitions. [2022-11-03 02:37:40,327 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 2402 transitions. Word has length 122 [2022-11-03 02:37:40,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:40,328 INFO L495 AbstractCegarLoop]: Abstraction has 1892 states and 2402 transitions. [2022-11-03 02:37:40,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:40,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 2402 transitions. [2022-11-03 02:37:40,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 02:37:40,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:40,330 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:40,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:40,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:40,550 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:40,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:40,550 INFO L85 PathProgramCache]: Analyzing trace with hash 760694657, now seen corresponding path program 1 times [2022-11-03 02:37:40,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:40,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517358227] [2022-11-03 02:37:40,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:40,552 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:40,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:40,555 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:40,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-03 02:37:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:41,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 1815 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:37:41,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:41,138 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-03 02:37:41,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:37:41,138 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:41,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517358227] [2022-11-03 02:37:41,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517358227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:41,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:37:41,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:37:41,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346807069] [2022-11-03 02:37:41,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:41,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:37:41,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:41,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:37:41,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:37:41,141 INFO L87 Difference]: Start difference. First operand 1892 states and 2402 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:41,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:41,238 INFO L93 Difference]: Finished difference Result 3415 states and 4365 transitions. [2022-11-03 02:37:41,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:37:41,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 122 [2022-11-03 02:37:41,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:41,241 INFO L225 Difference]: With dead ends: 3415 [2022-11-03 02:37:41,241 INFO L226 Difference]: Without dead ends: 1799 [2022-11-03 02:37:41,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 119 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 02:37:41,243 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 78 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:41,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 161 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:37:41,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2022-11-03 02:37:41,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1799. [2022-11-03 02:37:41,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1799 states, 1798 states have (on average 1.271412680756396) internal successors, (2286), 1798 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:41,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 2286 transitions. [2022-11-03 02:37:41,296 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 2286 transitions. Word has length 122 [2022-11-03 02:37:41,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:41,296 INFO L495 AbstractCegarLoop]: Abstraction has 1799 states and 2286 transitions. [2022-11-03 02:37:41,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:41,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 2286 transitions. [2022-11-03 02:37:41,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 02:37:41,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:41,298 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, 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 02:37:41,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:41,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:41,511 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:41,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:41,511 INFO L85 PathProgramCache]: Analyzing trace with hash 838074969, now seen corresponding path program 1 times [2022-11-03 02:37:41,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:41,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92885534] [2022-11-03 02:37:41,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:41,513 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:41,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:41,514 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:41,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-03 02:37:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:42,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 1815 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:37:42,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:42,088 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 02:37:42,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:37:42,088 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:42,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92885534] [2022-11-03 02:37:42,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92885534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:42,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:37:42,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:37:42,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748600752] [2022-11-03 02:37:42,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:42,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:37:42,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:42,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:37:42,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:37:42,091 INFO L87 Difference]: Start difference. First operand 1799 states and 2286 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 02:37:42,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:42,175 INFO L93 Difference]: Finished difference Result 2982 states and 3833 transitions. [2022-11-03 02:37:42,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:37:42,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 122 [2022-11-03 02:37:42,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:42,177 INFO L225 Difference]: With dead ends: 2982 [2022-11-03 02:37:42,177 INFO L226 Difference]: Without dead ends: 1364 [2022-11-03 02:37:42,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 119 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 02:37:42,179 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 78 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:42,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 159 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:37:42,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2022-11-03 02:37:42,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1364. [2022-11-03 02:37:42,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1363 states have (on average 1.289068231841526) internal successors, (1757), 1363 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:42,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 1757 transitions. [2022-11-03 02:37:42,221 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 1757 transitions. Word has length 122 [2022-11-03 02:37:42,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:42,221 INFO L495 AbstractCegarLoop]: Abstraction has 1364 states and 1757 transitions. [2022-11-03 02:37:42,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 02:37:42,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 1757 transitions. [2022-11-03 02:37:42,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-03 02:37:42,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:42,223 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:42,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:42,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:42,443 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:42,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:42,443 INFO L85 PathProgramCache]: Analyzing trace with hash -191616765, now seen corresponding path program 2 times [2022-11-03 02:37:42,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:42,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837318466] [2022-11-03 02:37:42,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:37:42,444 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:42,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:42,445 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:42,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-03 02:37:43,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:37:43,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:37:43,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 2404 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 02:37:43,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:43,835 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 53 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:37:43,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:46,233 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 53 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:37:46,233 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:46,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837318466] [2022-11-03 02:37:46,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837318466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:46,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [526603152] [2022-11-03 02:37:46,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:37:46,234 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:37:46,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:37:46,238 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:37:46,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-11-03 02:37:47,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:37:47,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:37:47,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 2404 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 02:37:47,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 53 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:37:48,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 53 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:37:48,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [526603152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:48,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248643636] [2022-11-03 02:37:48,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:37:48,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:48,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:37:48,557 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:37:48,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-03 02:37:49,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:37:49,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:37:49,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 2404 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:37:49,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 57 proven. 128 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 02:37:49,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:49,819 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 170 proven. 15 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 02:37:49,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248643636] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:49,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:37:49,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 10, 9] total 42 [2022-11-03 02:37:49,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677565720] [2022-11-03 02:37:49,820 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:37:49,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 02:37:49,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:49,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 02:37:49,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1597, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 02:37:49,822 INFO L87 Difference]: Start difference. First operand 1364 states and 1757 transitions. Second operand has 42 states, 42 states have (on average 8.833333333333334) internal successors, (371), 42 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:55,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:55,996 INFO L93 Difference]: Finished difference Result 6780 states and 8695 transitions. [2022-11-03 02:37:55,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-11-03 02:37:55,997 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 8.833333333333334) internal successors, (371), 42 states have internal predecessors, (371), 0 states have call successors, (0), 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 161 [2022-11-03 02:37:55,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:56,001 INFO L225 Difference]: With dead ends: 6780 [2022-11-03 02:37:56,001 INFO L226 Difference]: Without dead ends: 5745 [2022-11-03 02:37:56,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1113 GetRequests, 977 SyntacticMatches, 2 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4838 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=2138, Invalid=16222, Unknown=0, NotChecked=0, Total=18360 [2022-11-03 02:37:56,004 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 2970 mSDsluCounter, 3268 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2970 SdHoareTripleChecker+Valid, 3398 SdHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 838 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:56,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2970 Valid, 3398 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 939 Invalid, 0 Unknown, 838 Unchecked, 1.3s Time] [2022-11-03 02:37:56,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5745 states. [2022-11-03 02:37:56,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5745 to 2664. [2022-11-03 02:37:56,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2664 states, 2663 states have (on average 1.2654900488171235) internal successors, (3370), 2663 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:56,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2664 states to 2664 states and 3370 transitions. [2022-11-03 02:37:56,093 INFO L78 Accepts]: Start accepts. Automaton has 2664 states and 3370 transitions. Word has length 161 [2022-11-03 02:37:56,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:56,093 INFO L495 AbstractCegarLoop]: Abstraction has 2664 states and 3370 transitions. [2022-11-03 02:37:56,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 8.833333333333334) internal successors, (371), 42 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:56,094 INFO L276 IsEmpty]: Start isEmpty. Operand 2664 states and 3370 transitions. [2022-11-03 02:37:56,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-03 02:37:56,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:56,096 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:56,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:56,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-11-03 02:37:56,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (68)] Ended with exit code 0 [2022-11-03 02:37:56,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:37:56,711 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:56,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:56,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1880560507, now seen corresponding path program 3 times [2022-11-03 02:37:56,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:56,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719678492] [2022-11-03 02:37:56,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:37:56,713 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:56,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:56,714 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:56,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-03 02:37:57,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:37:57,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:37:57,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:37:57,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 51 proven. 138 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-03 02:37:57,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 170 proven. 19 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-03 02:37:57,817 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:57,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719678492] [2022-11-03 02:37:57,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719678492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:57,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1395717059] [2022-11-03 02:37:57,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:37:57,818 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:37:57,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:37:57,818 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:37:57,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-11-03 02:37:58,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:37:58,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:37:58,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:37:58,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 51 proven. 138 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-03 02:37:58,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:59,156 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 170 proven. 19 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-03 02:37:59,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1395717059] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:59,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672559791] [2022-11-03 02:37:59,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:37:59,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:59,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:37:59,158 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:37:59,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-03 02:37:59,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:37:59,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:37:59,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:37:59,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:59,845 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 51 proven. 138 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-03 02:37:59,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 170 proven. 19 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-03 02:38:00,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672559791] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:00,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:38:00,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12, 11, 12, 11] total 18 [2022-11-03 02:38:00,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804636160] [2022-11-03 02:38:00,034 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:38:00,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 02:38:00,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:00,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 02:38:00,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:38:00,036 INFO L87 Difference]: Start difference. First operand 2664 states and 3370 transitions. Second operand has 18 states, 18 states have (on average 10.555555555555555) internal successors, (190), 18 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:00,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:00,672 INFO L93 Difference]: Finished difference Result 8534 states and 10820 transitions. [2022-11-03 02:38:00,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-03 02:38:00,672 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.555555555555555) internal successors, (190), 18 states have internal predecessors, (190), 0 states have call successors, (0), 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 161 [2022-11-03 02:38:00,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:00,676 INFO L225 Difference]: With dead ends: 8534 [2022-11-03 02:38:00,676 INFO L226 Difference]: Without dead ends: 6343 [2022-11-03 02:38:00,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 989 GetRequests, 951 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:38:00,679 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 179 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:00,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 969 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 104 Invalid, 0 Unknown, 76 Unchecked, 0.1s Time] [2022-11-03 02:38:00,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6343 states. [2022-11-03 02:38:00,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6343 to 5661. [2022-11-03 02:38:00,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5661 states, 5660 states have (on average 1.2563604240282686) internal successors, (7111), 5660 states have internal predecessors, (7111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:00,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5661 states to 5661 states and 7111 transitions. [2022-11-03 02:38:00,764 INFO L78 Accepts]: Start accepts. Automaton has 5661 states and 7111 transitions. Word has length 161 [2022-11-03 02:38:00,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:00,764 INFO L495 AbstractCegarLoop]: Abstraction has 5661 states and 7111 transitions. [2022-11-03 02:38:00,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.555555555555555) internal successors, (190), 18 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:00,765 INFO L276 IsEmpty]: Start isEmpty. Operand 5661 states and 7111 transitions. [2022-11-03 02:38:00,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-03 02:38:00,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:00,767 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:38:00,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (71)] Ended with exit code 0 [2022-11-03 02:38:00,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-11-03 02:38:01,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-03 02:38:01,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:38:01,368 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:01,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:01,369 INFO L85 PathProgramCache]: Analyzing trace with hash 826058887, now seen corresponding path program 4 times [2022-11-03 02:38:01,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:01,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832012804] [2022-11-03 02:38:01,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:38:01,370 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:01,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:01,371 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:01,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-03 02:38:02,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:38:02,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:38:02,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 2404 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-03 02:38:02,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 29 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:03,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:05,312 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 29 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:05,312 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:05,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832012804] [2022-11-03 02:38:05,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832012804] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:05,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1265082303] [2022-11-03 02:38:05,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:38:05,313 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:05,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:38:05,313 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:38:05,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2022-11-03 02:38:06,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:38:06,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:38:06,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 2404 conjuncts, 117 conjunts are in the unsatisfiable core [2022-11-03 02:38:06,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:10,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:48,765 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:48,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1265082303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:48,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755821369] [2022-11-03 02:38:48,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:38:48,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:38:48,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:38:48,766 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:38:48,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-03 02:38:49,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:38:49,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:38:49,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 2404 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:38:49,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:50,829 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 97 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:50,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 110 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:52,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755821369] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:52,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:38:52,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 38, 38, 18, 17] total 124 [2022-11-03 02:38:52,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921288174] [2022-11-03 02:38:52,650 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:38:52,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-11-03 02:38:52,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:52,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-11-03 02:38:52,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=14530, Unknown=14, NotChecked=0, Total=15252 [2022-11-03 02:38:52,653 INFO L87 Difference]: Start difference. First operand 5661 states and 7111 transitions. Second operand has 124 states, 124 states have (on average 5.991935483870968) internal successors, (743), 124 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:23,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:23,272 INFO L93 Difference]: Finished difference Result 61778 states and 76254 transitions. [2022-11-03 02:39:23,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 314 states. [2022-11-03 02:39:23,272 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 5.991935483870968) internal successors, (743), 124 states have internal predecessors, (743), 0 states have call successors, (0), 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 161 [2022-11-03 02:39:23,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:23,309 INFO L225 Difference]: With dead ends: 61778 [2022-11-03 02:39:23,309 INFO L226 Difference]: Without dead ends: 59823 [2022-11-03 02:39:23,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1360 GetRequests, 951 SyntacticMatches, 9 SemanticMatches, 400 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62070 ImplicationChecksByTransitivity, 72.4s TimeCoverageRelationStatistics Valid=7166, Invalid=154022, Unknown=14, NotChecked=0, Total=161202 [2022-11-03 02:39:23,321 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 1225 mSDsluCounter, 4042 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 4099 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 547 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:23,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1225 Valid, 4099 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 547 Unchecked, 0.1s Time] [2022-11-03 02:39:23,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59823 states. [2022-11-03 02:39:23,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59823 to 34161. [2022-11-03 02:39:23,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34161 states, 34160 states have (on average 1.236387587822014) internal successors, (42235), 34160 states have internal predecessors, (42235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:23,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34161 states to 34161 states and 42235 transitions. [2022-11-03 02:39:23,968 INFO L78 Accepts]: Start accepts. Automaton has 34161 states and 42235 transitions. Word has length 161 [2022-11-03 02:39:23,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:23,968 INFO L495 AbstractCegarLoop]: Abstraction has 34161 states and 42235 transitions. [2022-11-03 02:39:23,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 5.991935483870968) internal successors, (743), 124 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:23,968 INFO L276 IsEmpty]: Start isEmpty. Operand 34161 states and 42235 transitions. [2022-11-03 02:39:23,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-03 02:39:23,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:23,987 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:23,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (74)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:24,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-11-03 02:39:24,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Ended with exit code 0 [2022-11-03 02:39:24,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:24,588 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:24,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:24,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1248760713, now seen corresponding path program 1 times [2022-11-03 02:39:24,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:24,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297519677] [2022-11-03 02:39:24,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:24,590 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:24,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:24,591 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:24,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-03 02:39:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:25,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 2404 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:39:25,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 122 proven. 5 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-03 02:39:25,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 124 proven. 3 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-03 02:39:25,930 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:25,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297519677] [2022-11-03 02:39:25,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297519677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:25,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [598597210] [2022-11-03 02:39:25,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:25,930 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:25,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:39:25,933 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:39:25,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2022-11-03 02:39:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:27,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 2404 conjuncts, 117 conjunts are in the unsatisfiable core [2022-11-03 02:39:27,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:30,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:06,218 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:06,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [598597210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:06,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265374993] [2022-11-03 02:40:06,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:06,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:06,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:06,219 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:40:06,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-11-03 02:40:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:06,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 2404 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:40:06,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 110 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-03 02:40:07,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 124 proven. 3 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-03 02:40:07,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265374993] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:07,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:40:07,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 38, 38, 8, 6] total 82 [2022-11-03 02:40:07,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591883902] [2022-11-03 02:40:07,278 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:40:07,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-11-03 02:40:07,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:40:07,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-11-03 02:40:07,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=6216, Unknown=13, NotChecked=0, Total=6642 [2022-11-03 02:40:07,280 INFO L87 Difference]: Start difference. First operand 34161 states and 42235 transitions. Second operand has 82 states, 82 states have (on average 5.060975609756097) internal successors, (415), 82 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:16,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:16,746 INFO L93 Difference]: Finished difference Result 102607 states and 126905 transitions. [2022-11-03 02:40:16,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-11-03 02:40:16,746 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 5.060975609756097) internal successors, (415), 82 states have internal predecessors, (415), 0 states have call successors, (0), 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 161 [2022-11-03 02:40:16,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:16,811 INFO L225 Difference]: With dead ends: 102607 [2022-11-03 02:40:16,812 INFO L226 Difference]: Without dead ends: 80107 [2022-11-03 02:40:16,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1075 GetRequests, 924 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6442 ImplicationChecksByTransitivity, 44.0s TimeCoverageRelationStatistics Valid=2810, Invalid=20433, Unknown=13, NotChecked=0, Total=23256 [2022-11-03 02:40:16,832 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 5163 mSDsluCounter, 2413 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5163 SdHoareTripleChecker+Valid, 2479 SdHoareTripleChecker+Invalid, 3812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2811 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:16,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5163 Valid, 2479 Invalid, 3812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 647 Invalid, 0 Unknown, 2811 Unchecked, 1.1s Time] [2022-11-03 02:40:16,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80107 states. [2022-11-03 02:40:17,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80107 to 36874. [2022-11-03 02:40:17,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36874 states, 36873 states have (on average 1.1847693434220161) internal successors, (43686), 36873 states have internal predecessors, (43686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:17,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36874 states to 36874 states and 43686 transitions. [2022-11-03 02:40:17,850 INFO L78 Accepts]: Start accepts. Automaton has 36874 states and 43686 transitions. Word has length 161 [2022-11-03 02:40:17,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:17,850 INFO L495 AbstractCegarLoop]: Abstraction has 36874 states and 43686 transitions. [2022-11-03 02:40:17,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 5.060975609756097) internal successors, (415), 82 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:17,850 INFO L276 IsEmpty]: Start isEmpty. Operand 36874 states and 43686 transitions. [2022-11-03 02:40:17,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-03 02:40:17,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:17,864 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, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:17,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-11-03 02:40:18,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:18,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (77)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:18,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:18,465 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:18,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:18,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1996508259, now seen corresponding path program 2 times [2022-11-03 02:40:18,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:40:18,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [981814937] [2022-11-03 02:40:18,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:40:18,467 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:40:18,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:40:18,468 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:40:18,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-03 02:40:19,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:40:19,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:40:19,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 2404 conjuncts, 214 conjunts are in the unsatisfiable core [2022-11-03 02:40:19,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:27,684 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 113 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:27,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:59,635 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~var_68_arg_1~0#1_174| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_155_arg_1~0#1_175| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_68_arg_1~0#1_173| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_189_arg_1~0#1_175| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_39_arg_1~0#1_169| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_121_arg_0~0#1_175| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_206_arg_1~0#1_175| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_223_arg_1~0#1_175| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_53_arg_1~0#1_173| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_138_arg_1~0#1_175| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_64_arg_1~0#1_173| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_46_arg_1~0#1_171| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_59_arg_1~0#1_173| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_172_arg_1~0#1_175| (_ BitVec 8))) (not (= ((_ extract 7 0) (let ((.cse0 ((_ zero_extend 24) |c_ULTIMATE.start_main_~mask_SORT_1~0#1|))) (bvand .cse0 ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_223_arg_1~0#1_175|) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_155_arg_1~0#1_175|) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_138_arg_1~0#1_175|) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) (let ((.cse1 ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) |c_ULTIMATE.start_main_~var_65_arg_1~0#1|))))) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_27~0#1|) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_68_arg_1~0#1_174|) ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_25~0#1|))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse1 ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_68_arg_1~0#1_173|)))))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (let ((.cse2 ((_ zero_extend 24) |c_ULTIMATE.start_main_~next_62_arg_1~0#1|))) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_64_arg_1~0#1_173|) .cse2)))))))) ((_ zero_extend 24) ((_ extract 7 0) (let ((.cse3 ((_ zero_extend 24) |c_ULTIMATE.start_main_~next_51_arg_1~0#1|))) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse0 ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_53_arg_1~0#1_173|) .cse3))))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse0 ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) |c_ULTIMATE.start_main_~var_3~0#1|))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse0 ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) |c_ULTIMATE.start_main_~next_44_arg_1~0#1|) ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse2 ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_46_arg_1~0#1_171|)))))))))))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse0 ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) |c_ULTIMATE.start_main_~next_49_arg_1~0#1|)))))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) |c_ULTIMATE.start_main_~next_55_arg_1~0#1|))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) |c_ULTIMATE.start_main_~next_57_arg_1~0#1|) ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse3 ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_59_arg_1~0#1_173|))))))))) .cse0)))))))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_39_arg_1~0#1_169|) .cse1))) ((_ zero_extend 24) |c_ULTIMATE.start_main_~next_42_arg_1~0#1|)))))))))))))))) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_121_arg_0~0#1_175|)))))))))) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_172_arg_1~0#1_175|)))) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_189_arg_1~0#1_175|)))) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_206_arg_1~0#1_175|)))))))))) (_ bv0 8)))) is different from false [2022-11-03 02:41:31,277 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~var_68_arg_1~0#1_174| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_155_arg_1~0#1_175| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_68_arg_1~0#1_173| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_189_arg_1~0#1_175| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_39_arg_1~0#1_169| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_121_arg_0~0#1_175| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_206_arg_1~0#1_175| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_223_arg_1~0#1_175| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_53_arg_1~0#1_173| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_138_arg_1~0#1_175| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_53_arg_1~0#1_174| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_64_arg_1~0#1_174| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_64_arg_1~0#1_173| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_46_arg_1~0#1_171| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_59_arg_1~0#1_173| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_59_arg_1~0#1_174| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_172_arg_1~0#1_175| (_ BitVec 8))) (not (= ((_ extract 7 0) (let ((.cse0 ((_ zero_extend 24) |c_ULTIMATE.start_main_~mask_SORT_1~0#1|))) (bvand .cse0 ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) (let ((.cse1 ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_64_arg_1~0#1_174|) ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_23~0#1|)))))))) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_27~0#1|) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_68_arg_1~0#1_174|) ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_25~0#1|))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse1 ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_68_arg_1~0#1_173|)))))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (let ((.cse2 ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_17~0#1|))) (let ((.cse4 ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_21~0#1|) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_59_arg_1~0#1_174|) .cse2)))))))) .cse0))))) (bvand ((_ zero_extend 24) ((_ extract 7 0) (let ((.cse3 ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse0 ((_ zero_extend 24) ((_ extract 7 0) |c_ULTIMATE.start_main_#t~ite18#1|))))))) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse0 ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_53_arg_1~0#1_174|) .cse2))))))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse0 ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse3 ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_53_arg_1~0#1_173|)))))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse0 ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) |c_ULTIMATE.start_main_~var_3~0#1|))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse0 ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse4 ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_46_arg_1~0#1_171|)))) ((_ zero_extend 24) |c_ULTIMATE.start_main_~next_44_arg_1~0#1|))))))))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse0 ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) |c_ULTIMATE.start_main_~next_49_arg_1~0#1|))))))))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse0 ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_19~0#1|))) ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse3 ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_59_arg_1~0#1_173|))))))))))))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_64_arg_1~0#1_173|) .cse4))))))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse1 ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_39_arg_1~0#1_169|)))) ((_ zero_extend 24) |c_ULTIMATE.start_main_~next_42_arg_1~0#1|)))))))))))))))) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_121_arg_0~0#1_175|)))) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_138_arg_1~0#1_175|)))) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_155_arg_1~0#1_175|)))) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_172_arg_1~0#1_175|)))) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_189_arg_1~0#1_175|)))) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_206_arg_1~0#1_175|)))) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_223_arg_1~0#1_175|))))))) (_ bv0 8)))) is different from false [2022-11-03 02:41:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 113 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-11-03 02:41:57,502 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:57,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [981814937] [2022-11-03 02:41:57,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [981814937] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:57,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [55665935] [2022-11-03 02:41:57,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:41:57,502 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:57,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:57,504 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:57,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2022-11-03 02:41:58,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:41:58,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:41:58,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 2404 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:41:58,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-03 02:41:59,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:59,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [55665935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:59,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:41:59,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [46, 46] total 93 [2022-11-03 02:41:59,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087860799] [2022-11-03 02:41:59,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:59,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:41:59,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:59,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:41:59,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=7956, Unknown=17, NotChecked=358, Total=8556 [2022-11-03 02:41:59,780 INFO L87 Difference]: Start difference. First operand 36874 states and 43686 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:01,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:01,210 INFO L93 Difference]: Finished difference Result 59490 states and 70457 transitions. [2022-11-03 02:42:01,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:42:01,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 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 161 [2022-11-03 02:42:01,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:01,233 INFO L225 Difference]: With dead ends: 59490 [2022-11-03 02:42:01,233 INFO L226 Difference]: Without dead ends: 36346 [2022-11-03 02:42:01,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 96.0s TimeCoverageRelationStatistics Valid=240, Invalid=8493, Unknown=17, NotChecked=370, Total=9120 [2022-11-03 02:42:01,248 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 136 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:01,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 210 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:42:01,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36346 states. [2022-11-03 02:42:01,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36346 to 36040. [2022-11-03 02:42:01,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36040 states, 36039 states have (on average 1.1801104359166459) internal successors, (42530), 36039 states have internal predecessors, (42530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:01,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36040 states to 36040 states and 42530 transitions. [2022-11-03 02:42:01,856 INFO L78 Accepts]: Start accepts. Automaton has 36040 states and 42530 transitions. Word has length 161 [2022-11-03 02:42:01,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:01,857 INFO L495 AbstractCegarLoop]: Abstraction has 36040 states and 42530 transitions. [2022-11-03 02:42:01,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:01,857 INFO L276 IsEmpty]: Start isEmpty. Operand 36040 states and 42530 transitions. [2022-11-03 02:42:01,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-11-03 02:42:01,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:01,885 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:01,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (80)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:02,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Ended with exit code 0 [2022-11-03 02:42:02,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:42:02,293 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:02,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:02,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1136063909, now seen corresponding path program 1 times [2022-11-03 02:42:02,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:02,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437144639] [2022-11-03 02:42:02,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:02,295 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:02,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:02,296 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:02,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-03 02:42:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:03,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 2993 conjuncts, 214 conjunts are in the unsatisfiable core [2022-11-03 02:42:03,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 234 proven. 129 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 02:42:11,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 234 proven. 129 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 02:44:01,927 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:01,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437144639] [2022-11-03 02:44:01,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437144639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:01,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1256821885] [2022-11-03 02:44:01,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:01,928 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:44:01,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:44:01,930 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:44:01,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2022-11-03 02:44:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:03,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 2993 conjuncts, 214 conjunts are in the unsatisfiable core [2022-11-03 02:44:03,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:07,095 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 234 proven. 129 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 02:44:07,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 234 proven. 129 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 02:47:02,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1256821885] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:02,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307244106] [2022-11-03 02:47:02,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:02,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:02,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:02,655 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:02,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-11-03 02:47:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:03,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 2993 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:47:03,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:09,557 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 76 proven. 180 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-03 02:47:09,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 241 proven. 15 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-03 02:47:12,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307244106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:12,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:47:12,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46, 46, 10, 9] total 117 [2022-11-03 02:47:12,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228235213] [2022-11-03 02:47:12,365 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:47:12,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-11-03 02:47:12,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:47:12,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-11-03 02:47:12,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=13058, Unknown=89, NotChecked=0, Total=13572 [2022-11-03 02:47:12,369 INFO L87 Difference]: Start difference. First operand 36040 states and 42530 transitions. Second operand has 117 states, 117 states have (on average 4.111111111111111) internal successors, (481), 117 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:29,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:29,125 INFO L93 Difference]: Finished difference Result 61593 states and 72612 transitions. [2022-11-03 02:47:29,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-03 02:47:29,126 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 4.111111111111111) internal successors, (481), 117 states have internal predecessors, (481), 0 states have call successors, (0), 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 200 [2022-11-03 02:47:29,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:29,156 INFO L225 Difference]: With dead ends: 61593 [2022-11-03 02:47:29,157 INFO L226 Difference]: Without dead ends: 39283 [2022-11-03 02:47:29,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1236 GetRequests, 1080 SyntacticMatches, 10 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3887 ImplicationChecksByTransitivity, 312.9s TimeCoverageRelationStatistics Valid=729, Invalid=20938, Unknown=89, NotChecked=0, Total=21756 [2022-11-03 02:47:29,175 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 149 mSDsluCounter, 5756 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5844 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 433 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:29,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 5844 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 433 Unchecked, 0.0s Time] [2022-11-03 02:47:29,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39283 states. [2022-11-03 02:47:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39283 to 37223. [2022-11-03 02:47:29,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37223 states, 37222 states have (on average 1.1809413787545) internal successors, (43957), 37222 states have internal predecessors, (43957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:29,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37223 states to 37223 states and 43957 transitions. [2022-11-03 02:47:29,898 INFO L78 Accepts]: Start accepts. Automaton has 37223 states and 43957 transitions. Word has length 200 [2022-11-03 02:47:29,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:29,898 INFO L495 AbstractCegarLoop]: Abstraction has 37223 states and 43957 transitions. [2022-11-03 02:47:29,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 4.111111111111111) internal successors, (481), 117 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:29,898 INFO L276 IsEmpty]: Start isEmpty. Operand 37223 states and 43957 transitions. [2022-11-03 02:47:29,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-11-03 02:47:29,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:29,956 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:29,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:30,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-11-03 02:47:30,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (82)] Ended with exit code 0 [2022-11-03 02:47:30,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:47:30,579 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:30,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:30,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1307613977, now seen corresponding path program 1 times [2022-11-03 02:47:30,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:47:30,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16759598] [2022-11-03 02:47:30,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:30,582 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:47:30,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:47:30,583 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:47:30,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-03 02:47:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:31,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 2993 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:47:31,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:32,200 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 240 proven. 87 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 02:47:32,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 240 proven. 87 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 02:47:32,749 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:47:32,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16759598] [2022-11-03 02:47:32,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16759598] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:32,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1884060588] [2022-11-03 02:47:32,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:32,750 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:47:32,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:47:32,751 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:47:32,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (85)] Waiting until timeout for monitored process [2022-11-03 02:47:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:34,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 2993 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:47:34,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 240 proven. 87 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 02:47:35,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 240 proven. 87 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 02:47:35,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1884060588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:35,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713697100] [2022-11-03 02:47:35,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:35,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:35,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:35,773 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:35,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-11-03 02:47:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:36,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 2993 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:47:36,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:37,528 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 249 proven. 78 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 02:47:37,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:38,189 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 258 proven. 69 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 02:47:38,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713697100] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:38,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:47:38,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 11] total 35 [2022-11-03 02:47:38,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004729079] [2022-11-03 02:47:38,190 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:47:38,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 02:47:38,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:47:38,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 02:47:38,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:47:38,192 INFO L87 Difference]: Start difference. First operand 37223 states and 43957 transitions. Second operand has 35 states, 35 states have (on average 11.285714285714286) internal successors, (395), 35 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:41,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:41,419 INFO L93 Difference]: Finished difference Result 151003 states and 179649 transitions. [2022-11-03 02:47:41,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 02:47:41,419 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 11.285714285714286) internal successors, (395), 35 states have internal predecessors, (395), 0 states have call successors, (0), 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 200 [2022-11-03 02:47:41,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:41,505 INFO L225 Difference]: With dead ends: 151003 [2022-11-03 02:47:41,505 INFO L226 Difference]: Without dead ends: 117243 [2022-11-03 02:47:41,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1222 GetRequests, 1161 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=307, Invalid=2999, Unknown=0, NotChecked=0, Total=3306 [2022-11-03 02:47:41,525 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 290 mSDsluCounter, 2623 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 2745 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:41,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 2745 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 146 Unchecked, 0.1s Time] [2022-11-03 02:47:41,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117243 states. [2022-11-03 02:47:42,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117243 to 57551. [2022-11-03 02:47:42,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57551 states, 57550 states have (on average 1.1943527367506517) internal successors, (68735), 57550 states have internal predecessors, (68735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:42,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57551 states to 57551 states and 68735 transitions. [2022-11-03 02:47:42,935 INFO L78 Accepts]: Start accepts. Automaton has 57551 states and 68735 transitions. Word has length 200 [2022-11-03 02:47:42,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:42,935 INFO L495 AbstractCegarLoop]: Abstraction has 57551 states and 68735 transitions. [2022-11-03 02:47:42,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 11.285714285714286) internal successors, (395), 35 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:42,935 INFO L276 IsEmpty]: Start isEmpty. Operand 57551 states and 68735 transitions. [2022-11-03 02:47:42,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-11-03 02:47:42,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:42,995 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:43,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Ended with exit code 0 [2022-11-03 02:47:43,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:43,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (85)] Ended with exit code 0 [2022-11-03 02:47:43,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:47:43,596 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:43,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:43,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1196621885, now seen corresponding path program 2 times [2022-11-03 02:47:43,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:47:43,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647537547] [2022-11-03 02:47:43,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:47:43,599 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:47:43,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:47:43,600 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:47:43,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-03 02:47:44,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:47:44,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:44,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 2993 conjuncts, 147 conjunts are in the unsatisfiable core [2022-11-03 02:47:44,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 240 proven. 67 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-03 02:47:50,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:07,417 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~var_189_arg_1~0#1_213| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_206_arg_1~0#1_213| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_104_arg_0~0#1_213| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_155_arg_1~0#1_213| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_47_arg_1~0#1_210| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_68_arg_1~0#1_211| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_59_arg_1~0#1_211| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_121_arg_1~0#1_213| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_138_arg_1~0#1_213| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_172_arg_1~0#1_213| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_64_arg_1~0#1_211| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_223_arg_1~0#1_213| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_53_arg_1~0#1_211| (_ BitVec 8))) (not (= ((_ extract 7 0) (let ((.cse0 ((_ zero_extend 24) |c_ULTIMATE.start_main_~mask_SORT_1~0#1|))) (bvand .cse0 ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_189_arg_1~0#1_213|) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_121_arg_1~0#1_213|) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_27~0#1|) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_68_arg_1~0#1_211|) ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_25~0#1|)))))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (let ((.cse1 ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_17~0#1|))) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse0 ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_59_arg_1~0#1_211|) .cse1))) ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_21~0#1|)))))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse0 ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_15~0#1|))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse0 ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) |c_ULTIMATE.start_main_~var_3~0#1|))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse0 ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_47_arg_1~0#1_210|) ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_13~0#1|))))))))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse0 ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_53_arg_1~0#1_211|) .cse1)))))))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_19~0#1|))))))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_64_arg_1~0#1_211|) ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_23~0#1|)))))))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) |c_ULTIMATE.start_main_~var_41_arg_1~0#1|)))))))))))) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_104_arg_0~0#1_213|))))))) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_138_arg_1~0#1_213|)))) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_155_arg_1~0#1_213|)))) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_172_arg_1~0#1_213|))))))) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_206_arg_1~0#1_213|)))) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_223_arg_1~0#1_213|))))))) (_ bv0 8)))) is different from false [2022-11-03 02:48:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 240 proven. 65 refuted. 0 times theorem prover too weak. 93 trivial. 2 not checked. [2022-11-03 02:48:08,344 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:08,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647537547] [2022-11-03 02:48:08,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647537547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:08,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1413443295] [2022-11-03 02:48:08,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:48:08,344 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:08,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:08,345 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:08,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (88)] Waiting until timeout for monitored process [2022-11-03 02:48:09,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:48:09,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:09,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 2993 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:48:09,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:10,045 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 262 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-11-03 02:48:10,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:48:10,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1413443295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:48:10,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:48:10,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [26, 26] total 51 [2022-11-03 02:48:10,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361240368] [2022-11-03 02:48:10,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:48:10,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:48:10,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:48:10,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:48:10,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2329, Unknown=3, NotChecked=96, Total=2550 [2022-11-03 02:48:10,047 INFO L87 Difference]: Start difference. First operand 57551 states and 68735 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:11,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:11,167 INFO L93 Difference]: Finished difference Result 96002 states and 115810 transitions. [2022-11-03 02:48:11,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:48:11,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 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 200 [2022-11-03 02:48:11,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:11,196 INFO L225 Difference]: With dead ends: 96002 [2022-11-03 02:48:11,196 INFO L226 Difference]: Without dead ends: 41634 [2022-11-03 02:48:11,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 551 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=137, Invalid=2620, Unknown=3, NotChecked=102, Total=2862 [2022-11-03 02:48:11,222 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 209 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:11,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 138 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:48:11,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41634 states. [2022-11-03 02:48:12,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41634 to 41484. [2022-11-03 02:48:12,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41484 states, 41483 states have (on average 1.1835691729142057) internal successors, (49098), 41483 states have internal predecessors, (49098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:12,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41484 states to 41484 states and 49098 transitions. [2022-11-03 02:48:12,279 INFO L78 Accepts]: Start accepts. Automaton has 41484 states and 49098 transitions. Word has length 200 [2022-11-03 02:48:12,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:12,280 INFO L495 AbstractCegarLoop]: Abstraction has 41484 states and 49098 transitions. [2022-11-03 02:48:12,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:12,280 INFO L276 IsEmpty]: Start isEmpty. Operand 41484 states and 49098 transitions. [2022-11-03 02:48:12,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-11-03 02:48:12,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:12,323 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:12,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (87)] Ended with exit code 0 [2022-11-03 02:48:12,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (88)] Ended with exit code 0 [2022-11-03 02:48:12,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:12,739 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:12,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:12,740 INFO L85 PathProgramCache]: Analyzing trace with hash -945028119, now seen corresponding path program 2 times [2022-11-03 02:48:12,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:12,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538708527] [2022-11-03 02:48:12,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:48:12,742 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:12,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:12,743 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:12,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-03 02:48:13,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:48:13,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:13,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 2993 conjuncts, 147 conjunts are in the unsatisfiable core [2022-11-03 02:48:13,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 240 proven. 59 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-03 02:48:18,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 240 proven. 59 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-03 02:48:34,540 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:34,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538708527] [2022-11-03 02:48:34,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538708527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:34,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1840538099] [2022-11-03 02:48:34,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:48:34,540 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:34,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:34,541 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:34,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (90)] Waiting until timeout for monitored process [2022-11-03 02:48:36,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:48:36,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:36,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 2993 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:48:36,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:36,502 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-03 02:48:36,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:48:36,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1840538099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:48:36,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:48:36,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [26, 26] total 51 [2022-11-03 02:48:36,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671000087] [2022-11-03 02:48:36,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:48:36,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:48:36,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:48:36,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:48:36,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=2426, Unknown=1, NotChecked=0, Total=2550 [2022-11-03 02:48:36,504 INFO L87 Difference]: Start difference. First operand 41484 states and 49098 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:37,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:37,865 INFO L93 Difference]: Finished difference Result 65595 states and 78175 transitions. [2022-11-03 02:48:37,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:48:37,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2022-11-03 02:48:37,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:37,889 INFO L225 Difference]: With dead ends: 65595 [2022-11-03 02:48:37,889 INFO L226 Difference]: Without dead ends: 25844 [2022-11-03 02:48:37,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 551 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=138, Invalid=2723, Unknown=1, NotChecked=0, Total=2862 [2022-11-03 02:48:37,904 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 198 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:37,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 134 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:48:37,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25844 states. [2022-11-03 02:48:38,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25844 to 25782. [2022-11-03 02:48:38,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25782 states, 25781 states have (on average 1.1829641984407122) internal successors, (30498), 25781 states have internal predecessors, (30498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:38,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25782 states to 25782 states and 30498 transitions. [2022-11-03 02:48:38,703 INFO L78 Accepts]: Start accepts. Automaton has 25782 states and 30498 transitions. Word has length 200 [2022-11-03 02:48:38,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:38,703 INFO L495 AbstractCegarLoop]: Abstraction has 25782 states and 30498 transitions. [2022-11-03 02:48:38,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:38,703 INFO L276 IsEmpty]: Start isEmpty. Operand 25782 states and 30498 transitions. [2022-11-03 02:48:38,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-11-03 02:48:38,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:38,722 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:38,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:38,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (90)] Ended with exit code 0 [2022-11-03 02:48:39,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:39,123 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:39,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:39,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1369912869, now seen corresponding path program 2 times [2022-11-03 02:48:39,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:39,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261463181] [2022-11-03 02:48:39,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:48:39,125 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:39,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:39,126 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:39,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-03 02:48:40,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:48:40,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:40,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 2993 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:48:40,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 212 proven. 26 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-11-03 02:48:40,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:40,581 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 212 proven. 26 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-11-03 02:48:40,581 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:40,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261463181] [2022-11-03 02:48:40,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261463181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:40,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1287735627] [2022-11-03 02:48:40,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:48:40,582 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:40,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:40,583 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:40,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (92)] Waiting until timeout for monitored process [2022-11-03 02:48:42,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:48:42,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:42,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 2993 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:48:42,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 212 proven. 26 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-11-03 02:48:42,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 212 proven. 26 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-11-03 02:48:43,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1287735627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:43,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410991550] [2022-11-03 02:48:43,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:48:43,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:43,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:43,114 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:43,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-11-03 02:48:43,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:48:43,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:43,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 2993 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:48:43,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 212 proven. 26 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-11-03 02:48:44,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 212 proven. 26 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-11-03 02:48:44,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410991550] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:44,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:48:44,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 14 [2022-11-03 02:48:44,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487335302] [2022-11-03 02:48:44,296 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:48:44,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 02:48:44,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:48:44,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 02:48:44,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:48:44,299 INFO L87 Difference]: Start difference. First operand 25782 states and 30498 transitions. Second operand has 14 states, 14 states have (on average 13.5) internal successors, (189), 14 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:45,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:45,074 INFO L93 Difference]: Finished difference Result 47637 states and 56422 transitions. [2022-11-03 02:48:45,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:48:45,075 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.5) internal successors, (189), 14 states have internal predecessors, (189), 0 states have call successors, (0), 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 200 [2022-11-03 02:48:45,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:45,091 INFO L225 Difference]: With dead ends: 47637 [2022-11-03 02:48:45,091 INFO L226 Difference]: Without dead ends: 23379 [2022-11-03 02:48:45,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1195 GetRequests, 1180 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:48:45,098 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 12 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:45,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 655 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 76 Unchecked, 0.1s Time] [2022-11-03 02:48:45,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23379 states. [2022-11-03 02:48:45,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23379 to 23379. [2022-11-03 02:48:45,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23379 states, 23378 states have (on average 1.1834630849516639) internal successors, (27667), 23378 states have internal predecessors, (27667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:45,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23379 states to 23379 states and 27667 transitions. [2022-11-03 02:48:45,777 INFO L78 Accepts]: Start accepts. Automaton has 23379 states and 27667 transitions. Word has length 200 [2022-11-03 02:48:45,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:45,778 INFO L495 AbstractCegarLoop]: Abstraction has 23379 states and 27667 transitions. [2022-11-03 02:48:45,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.5) internal successors, (189), 14 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:45,778 INFO L276 IsEmpty]: Start isEmpty. Operand 23379 states and 27667 transitions. [2022-11-03 02:48:45,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-11-03 02:48:45,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:45,795 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:45,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (92)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:46,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (91)] Ended with exit code 0 [2022-11-03 02:48:46,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-11-03 02:48:46,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:46,396 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:46,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:46,397 INFO L85 PathProgramCache]: Analyzing trace with hash -231251101, now seen corresponding path program 3 times [2022-11-03 02:48:46,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:46,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960745194] [2022-11-03 02:48:46,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:48:46,399 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:46,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:46,400 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:46,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-03 02:48:47,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:48:47,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:47,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:48:47,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:47,459 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 44 proven. 194 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-11-03 02:48:47,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:47,694 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 221 proven. 17 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-11-03 02:48:47,694 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:47,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960745194] [2022-11-03 02:48:47,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960745194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:47,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1002163288] [2022-11-03 02:48:47,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:48:47,695 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:47,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:47,696 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:47,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (95)] Waiting until timeout for monitored process [2022-11-03 02:48:48,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:48:48,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:49,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:48:49,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:49,369 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 44 proven. 194 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-11-03 02:48:49,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 221 proven. 17 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-11-03 02:48:49,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1002163288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:49,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487633975] [2022-11-03 02:48:49,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:48:49,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:49,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:49,527 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:49,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-11-03 02:48:50,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:48:50,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:50,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:48:50,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:50,499 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 44 proven. 194 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-11-03 02:48:50,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 221 proven. 17 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-11-03 02:48:50,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487633975] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:50,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:48:50,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10, 9, 10, 9] total 14 [2022-11-03 02:48:50,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136556654] [2022-11-03 02:48:50,653 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:48:50,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 02:48:50,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:48:50,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 02:48:50,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:48:50,655 INFO L87 Difference]: Start difference. First operand 23379 states and 27667 transitions. Second operand has 14 states, 14 states have (on average 13.285714285714286) internal successors, (186), 14 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:52,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:52,729 INFO L93 Difference]: Finished difference Result 42926 states and 51021 transitions. [2022-11-03 02:48:52,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 02:48:52,729 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.285714285714286) internal successors, (186), 14 states have internal predecessors, (186), 0 states have call successors, (0), 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 200 [2022-11-03 02:48:52,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:52,755 INFO L225 Difference]: With dead ends: 42926 [2022-11-03 02:48:52,755 INFO L226 Difference]: Without dead ends: 34347 [2022-11-03 02:48:52,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1227 GetRequests, 1194 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=288, Invalid=902, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:48:52,764 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 717 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:52,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [717 Valid, 1331 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:48:52,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34347 states. [2022-11-03 02:48:53,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34347 to 24918. [2022-11-03 02:48:53,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24918 states, 24917 states have (on average 1.1831681181522655) internal successors, (29481), 24917 states have internal predecessors, (29481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:53,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24918 states to 24918 states and 29481 transitions. [2022-11-03 02:48:53,680 INFO L78 Accepts]: Start accepts. Automaton has 24918 states and 29481 transitions. Word has length 200 [2022-11-03 02:48:53,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:53,680 INFO L495 AbstractCegarLoop]: Abstraction has 24918 states and 29481 transitions. [2022-11-03 02:48:53,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.285714285714286) internal successors, (186), 14 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:53,680 INFO L276 IsEmpty]: Start isEmpty. Operand 24918 states and 29481 transitions. [2022-11-03 02:48:53,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-11-03 02:48:53,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:53,694 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:53,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Ended with exit code 0 [2022-11-03 02:48:53,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:54,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (95)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:54,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:54,304 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:54,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:54,304 INFO L85 PathProgramCache]: Analyzing trace with hash 469813477, now seen corresponding path program 1 times [2022-11-03 02:48:54,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:54,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409741665] [2022-11-03 02:48:54,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:54,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:54,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:54,307 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:54,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-11-03 02:48:55,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:55,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 2993 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:48:55,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 184 proven. 12 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-03 02:48:56,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:56,764 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 184 proven. 12 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-03 02:48:56,765 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:56,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409741665] [2022-11-03 02:48:56,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409741665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:56,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1418410194] [2022-11-03 02:48:56,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:56,766 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:56,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:56,767 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:56,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (98)] Waiting until timeout for monitored process [2022-11-03 02:48:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:58,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 2993 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:48:58,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-11-03 02:48:58,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:48:58,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1418410194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:48:58,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:48:58,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 11 [2022-11-03 02:48:58,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212403670] [2022-11-03 02:48:58,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:48:58,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:48:58,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:48:58,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:48:58,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:48:58,252 INFO L87 Difference]: Start difference. First operand 24918 states and 29481 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:58,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:58,807 INFO L93 Difference]: Finished difference Result 41064 states and 48850 transitions. [2022-11-03 02:48:58,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:48:58,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2022-11-03 02:48:58,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:58,821 INFO L225 Difference]: With dead ends: 41064 [2022-11-03 02:48:58,821 INFO L226 Difference]: Without dead ends: 16462 [2022-11-03 02:48:58,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 591 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:48:58,832 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 197 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:58,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 136 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:48:58,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16462 states. [2022-11-03 02:48:59,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16462 to 16360. [2022-11-03 02:48:59,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16360 states, 16359 states have (on average 1.178800660187053) internal successors, (19284), 16359 states have internal predecessors, (19284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:59,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16360 states to 16360 states and 19284 transitions. [2022-11-03 02:48:59,314 INFO L78 Accepts]: Start accepts. Automaton has 16360 states and 19284 transitions. Word has length 200 [2022-11-03 02:48:59,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:59,314 INFO L495 AbstractCegarLoop]: Abstraction has 16360 states and 19284 transitions. [2022-11-03 02:48:59,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:59,314 INFO L276 IsEmpty]: Start isEmpty. Operand 16360 states and 19284 transitions. [2022-11-03 02:48:59,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-11-03 02:48:59,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:59,325 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:59,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (98)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:59,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Ended with exit code 0 [2022-11-03 02:48:59,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:48:59,725 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:59,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:59,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1946348069, now seen corresponding path program 2 times [2022-11-03 02:48:59,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:59,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2002014506] [2022-11-03 02:48:59,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:48:59,728 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:59,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:59,729 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:59,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2022-11-03 02:49:00,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:49:00,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:49:00,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 2993 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:49:00,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 176 proven. 8 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-11-03 02:49:01,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 176 proven. 8 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-11-03 02:49:02,073 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:02,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2002014506] [2022-11-03 02:49:02,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2002014506] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:02,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [720096325] [2022-11-03 02:49:02,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:49:02,074 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:49:02,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:49:02,075 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:49:02,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (100)] Waiting until timeout for monitored process [2022-11-03 02:49:03,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:49:03,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:49:03,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 2993 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:49:03,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-11-03 02:49:03,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:03,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [720096325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:03,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:49:03,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 11 [2022-11-03 02:49:03,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425568827] [2022-11-03 02:49:03,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:03,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:49:03,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:03,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:49:03,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:49:03,683 INFO L87 Difference]: Start difference. First operand 16360 states and 19284 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:04,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:04,115 INFO L93 Difference]: Finished difference Result 25707 states and 30348 transitions. [2022-11-03 02:49:04,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:49:04,115 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 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 200 [2022-11-03 02:49:04,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:04,123 INFO L225 Difference]: With dead ends: 25707 [2022-11-03 02:49:04,123 INFO L226 Difference]: Without dead ends: 9650 [2022-11-03 02:49:04,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 590 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:49:04,129 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 188 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:04,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 132 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:49:04,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9650 states. [2022-11-03 02:49:04,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9650 to 9572. [2022-11-03 02:49:04,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9572 states, 9571 states have (on average 1.167485111273639) internal successors, (11174), 9571 states have internal predecessors, (11174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:04,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9572 states to 9572 states and 11174 transitions. [2022-11-03 02:49:04,435 INFO L78 Accepts]: Start accepts. Automaton has 9572 states and 11174 transitions. Word has length 200 [2022-11-03 02:49:04,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:04,435 INFO L495 AbstractCegarLoop]: Abstraction has 9572 states and 11174 transitions. [2022-11-03 02:49:04,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:04,436 INFO L276 IsEmpty]: Start isEmpty. Operand 9572 states and 11174 transitions. [2022-11-03 02:49:04,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-11-03 02:49:04,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:04,438 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:04,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (100)] Ended with exit code 0 [2022-11-03 02:49:04,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (99)] Ended with exit code 0 [2022-11-03 02:49:04,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:04,839 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:04,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:04,839 INFO L85 PathProgramCache]: Analyzing trace with hash -919248953, now seen corresponding path program 2 times [2022-11-03 02:49:04,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:04,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825346711] [2022-11-03 02:49:04,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:49:04,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:04,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:04,843 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:04,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac50e860-fbb1-44fe-ac72-5f998dc5b9cf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (101)] Waiting until timeout for monitored process