./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/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_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/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 32bit --witnessprinter.graph.data.programhash 94599b38b669e42115f92cee257d9ed4ed5d4777dca7d2ee690bacb4e0d226f0 --- 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 02:03:32,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:03:32,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:03:32,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:03:32,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:03:32,075 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:03:32,077 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:03:32,079 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:03:32,081 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:03:32,082 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:03:32,083 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:03:32,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:03:32,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:03:32,095 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:03:32,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:03:32,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:03:32,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:03:32,112 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:03:32,114 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:03:32,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:03:32,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:03:32,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:03:32,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:03:32,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:03:32,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:03:32,137 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:03:32,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:03:32,139 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:03:32,140 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:03:32,141 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:03:32,142 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:03:32,144 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:03:32,146 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:03:32,147 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:03:32,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:03:32,149 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:03:32,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:03:32,150 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:03:32,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:03:32,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:03:32,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:03:32,153 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:03:32,202 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:03:32,202 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:03:32,202 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:03:32,203 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:03:32,204 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:03:32,204 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:03:32,204 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:03:32,204 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:03:32,205 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:03:32,205 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:03:32,205 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:03:32,205 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:03:32,206 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:03:32,206 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:03:32,206 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:03:32,206 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:03:32,207 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:03:32,207 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:03:32,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:03:32,208 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:03:32,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:03:32,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:03:32,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:03:32,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:03:32,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:03:32,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:03:32,210 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:03:32,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:03:32,210 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:03:32,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:03:32,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:03:32,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:03:32,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:03:32,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:03:32,212 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:03:32,212 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:03:32,212 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:03:32,212 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:03:32,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:03:32,213 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:03:32,213 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:03:32,213 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_e31fa478-e888-466d-bf33-716c21449b83/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94599b38b669e42115f92cee257d9ed4ed5d4777dca7d2ee690bacb4e0d226f0 [2022-11-03 02:03:32,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:03:32,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:03:32,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:03:32,658 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:03:32,660 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:03:32,662 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i [2022-11-03 02:03:32,762 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/data/3b5918a17/bc3cc26566734fbe866bffbce8ebdd84/FLAG4d1e31b1f [2022-11-03 02:03:33,401 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:03:33,402 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i [2022-11-03 02:03:33,434 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/data/3b5918a17/bc3cc26566734fbe866bffbce8ebdd84/FLAG4d1e31b1f [2022-11-03 02:03:33,631 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/data/3b5918a17/bc3cc26566734fbe866bffbce8ebdd84 [2022-11-03 02:03:33,634 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:03:33,635 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:03:33,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:03:33,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:03:33,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:03:33,648 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:03:33" (1/1) ... [2022-11-03 02:03:33,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8c3ab5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:33, skipping insertion in model container [2022-11-03 02:03:33,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:03:33" (1/1) ... [2022-11-03 02:03:33,659 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:03:33,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:03:34,200 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_e31fa478-e888-466d-bf33-716c21449b83/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i[33021,33034] [2022-11-03 02:03:34,372 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_e31fa478-e888-466d-bf33-716c21449b83/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i[49681,49694] [2022-11-03 02:03:34,396 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:03:34,405 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:03:34,432 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_e31fa478-e888-466d-bf33-716c21449b83/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i[33021,33034] [2022-11-03 02:03:34,500 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_e31fa478-e888-466d-bf33-716c21449b83/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i[49681,49694] [2022-11-03 02:03:34,520 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:03:34,561 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:03:34,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:34 WrapperNode [2022-11-03 02:03:34,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:03:34,563 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:03:34,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:03:34,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:03:34,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:34" (1/1) ... [2022-11-03 02:03:34,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:34" (1/1) ... [2022-11-03 02:03:34,733 INFO L138 Inliner]: procedures = 177, calls = 487, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1694 [2022-11-03 02:03:34,743 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:03:34,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:03:34,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:03:34,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:03:34,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:34" (1/1) ... [2022-11-03 02:03:34,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:34" (1/1) ... [2022-11-03 02:03:34,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:34" (1/1) ... [2022-11-03 02:03:34,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:34" (1/1) ... [2022-11-03 02:03:34,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:34" (1/1) ... [2022-11-03 02:03:34,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:34" (1/1) ... [2022-11-03 02:03:34,979 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:34" (1/1) ... [2022-11-03 02:03:34,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:34" (1/1) ... [2022-11-03 02:03:34,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:03:34,998 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:03:34,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:03:34,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:03:35,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:34" (1/1) ... [2022-11-03 02:03:35,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:03:35,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:35,032 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:03:35,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:03:35,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:03:35,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:03:35,092 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:03:35,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:03:35,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 02:03:35,092 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 02:03:35,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:03:35,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:03:35,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:03:35,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:03:35,093 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-03 02:03:35,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:03:35,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:03:35,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:03:35,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:03:35,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:03:35,491 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:03:35,494 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:03:38,124 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:03:38,873 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:03:38,873 INFO L300 CfgBuilder]: Removed 100 assume(true) statements. [2022-11-03 02:03:38,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:03:38 BoogieIcfgContainer [2022-11-03 02:03:38,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:03:38,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:03:38,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:03:38,885 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:03:38,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:03:33" (1/3) ... [2022-11-03 02:03:38,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d883b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:03:38, skipping insertion in model container [2022-11-03 02:03:38,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:34" (2/3) ... [2022-11-03 02:03:38,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d883b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:03:38, skipping insertion in model container [2022-11-03 02:03:38,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:03:38" (3/3) ... [2022-11-03 02:03:38,891 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test5-3.i [2022-11-03 02:03:38,912 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:03:38,913 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 02:03:38,998 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:03:39,007 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;@5bfff6e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:03:39,007 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 02:03:39,013 INFO L276 IsEmpty]: Start isEmpty. Operand has 177 states, 161 states have (on average 1.813664596273292) internal successors, (292), 168 states have internal predecessors, (292), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 02:03:39,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 02:03:39,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:39,021 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 02:03:39,022 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:39,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:39,030 INFO L85 PathProgramCache]: Analyzing trace with hash 691822388, now seen corresponding path program 1 times [2022-11-03 02:03:39,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:03:39,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683035727] [2022-11-03 02:03:39,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:39,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:03:39,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:39,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:03:39,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683035727] [2022-11-03 02:03:39,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 02:03:39,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510076865] [2022-11-03 02:03:39,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:39,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:39,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:39,237 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:39,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:03:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:39,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 02:03:39,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:39,664 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 02:03:39,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:39,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510076865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:39,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:03:39,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:03:39,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390112992] [2022-11-03 02:03:39,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:39,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:03:39,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:03:39,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:03:39,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:03:39,723 INFO L87 Difference]: Start difference. First operand has 177 states, 161 states have (on average 1.813664596273292) internal successors, (292), 168 states have internal predecessors, (292), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:40,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:40,700 INFO L93 Difference]: Finished difference Result 353 states and 632 transitions. [2022-11-03 02:03:40,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:03:40,711 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-11-03 02:03:40,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:40,722 INFO L225 Difference]: With dead ends: 353 [2022-11-03 02:03:40,722 INFO L226 Difference]: Without dead ends: 150 [2022-11-03 02:03:40,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:03:40,731 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:40,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 184 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:03:40,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-03 02:03:40,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-11-03 02:03:40,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 135 states have (on average 1.1925925925925926) internal successors, (161), 141 states have internal predecessors, (161), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 02:03:40,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 183 transitions. [2022-11-03 02:03:40,792 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 183 transitions. Word has length 6 [2022-11-03 02:03:40,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:40,793 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 183 transitions. [2022-11-03 02:03:40,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:40,794 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 183 transitions. [2022-11-03 02:03:40,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 02:03:40,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:40,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:40,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:40,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-03 02:03:40,997 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:40,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:40,998 INFO L85 PathProgramCache]: Analyzing trace with hash -2138306403, now seen corresponding path program 1 times [2022-11-03 02:03:40,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:03:40,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23254953] [2022-11-03 02:03:40,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:40,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:03:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:41,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:03:41,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23254953] [2022-11-03 02:03:41,088 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 02:03:41,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219665125] [2022-11-03 02:03:41,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:41,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:41,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:41,097 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:41,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:03:41,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:41,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:03:41,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:41,481 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 02:03:41,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:41,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219665125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:41,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:03:41,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:03:41,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10488026] [2022-11-03 02:03:41,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:41,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:03:41,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:03:41,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:03:41,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:03:41,486 INFO L87 Difference]: Start difference. First operand 150 states and 183 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:44,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:44,122 INFO L93 Difference]: Finished difference Result 342 states and 425 transitions. [2022-11-03 02:03:44,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:03:44,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2022-11-03 02:03:44,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:44,132 INFO L225 Difference]: With dead ends: 342 [2022-11-03 02:03:44,132 INFO L226 Difference]: Without dead ends: 290 [2022-11-03 02:03:44,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:03:44,135 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 149 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:44,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 339 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 02:03:44,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-11-03 02:03:44,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 151. [2022-11-03 02:03:44,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 136 states have (on average 1.1911764705882353) internal successors, (162), 142 states have internal predecessors, (162), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 02:03:44,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 184 transitions. [2022-11-03 02:03:44,191 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 184 transitions. Word has length 17 [2022-11-03 02:03:44,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:44,192 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 184 transitions. [2022-11-03 02:03:44,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:44,192 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 184 transitions. [2022-11-03 02:03:44,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 02:03:44,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:44,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:44,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:44,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-03 02:03:44,423 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:44,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:44,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1812058529, now seen corresponding path program 1 times [2022-11-03 02:03:44,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:03:44,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151392460] [2022-11-03 02:03:44,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:44,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:03:44,740 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:03:44,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1073760748] [2022-11-03 02:03:44,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:44,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:44,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:44,751 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:44,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:03:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:46,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 3112 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:03:46,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:46,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:46,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:46,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:03:46,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151392460] [2022-11-03 02:03:46,510 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:03:46,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073760748] [2022-11-03 02:03:46,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073760748] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:46,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [216535132] [2022-11-03 02:03:46,535 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2022-11-03 02:03:46,535 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:03:46,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:03:46,546 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:03:46,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:03:46,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:46,725 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:03:46,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 02:03:46,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:46,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 02:03:46,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:46,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:46,846 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:03:46,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 02:03:46,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:46,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:03:46,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:46,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:46,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-03 02:03:46,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:46,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:03:46,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:46,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:03:46,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2022-11-03 02:03:47,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:03:47,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:03:47,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:03:47,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:03:47,483 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:03:47,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:03:47,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:03:47,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:03:47,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:03:47,928 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:03:47,938 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:03:49,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [216535132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:49,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:03:49,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3] total 11 [2022-11-03 02:03:49,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65563860] [2022-11-03 02:03:49,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:49,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:03:49,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:03:49,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:03:49,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=73, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:03:49,243 INFO L87 Difference]: Start difference. First operand 151 states and 184 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 7 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 02:03:51,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:03:56,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:04:00,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:04:01,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:01,881 INFO L93 Difference]: Finished difference Result 319 states and 389 transitions. [2022-11-03 02:04:01,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:04:01,882 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 7 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 61 [2022-11-03 02:04:01,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:01,883 INFO L225 Difference]: With dead ends: 319 [2022-11-03 02:04:01,884 INFO L226 Difference]: Without dead ends: 170 [2022-11-03 02:04:01,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:04:01,889 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 17 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:01,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 703 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 11.8s Time] [2022-11-03 02:04:01,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-03 02:04:01,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 161. [2022-11-03 02:04:01,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 146 states have (on average 1.178082191780822) internal successors, (172), 152 states have internal predecessors, (172), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 02:04:01,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 194 transitions. [2022-11-03 02:04:01,914 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 194 transitions. Word has length 61 [2022-11-03 02:04:01,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:01,915 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 194 transitions. [2022-11-03 02:04:01,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 7 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 02:04:01,915 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 194 transitions. [2022-11-03 02:04:01,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 02:04:01,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:01,918 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:04:01,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-03 02:04:02,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:02,135 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:02,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:02,136 INFO L85 PathProgramCache]: Analyzing trace with hash -100777100, now seen corresponding path program 1 times [2022-11-03 02:04:02,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:02,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062672926] [2022-11-03 02:04:02,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:02,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:02,407 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:04:02,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386235260] [2022-11-03 02:04:02,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:02,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:02,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:02,410 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:02,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:04:03,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:03,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 2249 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:04:03,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:03,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:04:03,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:04:04,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:04,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062672926] [2022-11-03 02:04:04,137 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:04:04,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386235260] [2022-11-03 02:04:04,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386235260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:04,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [660017145] [2022-11-03 02:04:04,148 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-03 02:04:04,149 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:04:04,150 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:04:04,151 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:04:04,151 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:04:04,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:04,290 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:04:04,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-03 02:04:04,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:04,327 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:04:04,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 02:04:04,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:04,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:04,395 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 02:04:04,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2022-11-03 02:04:04,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:04,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:04:04,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:04,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:04:04,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:04,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:04:04,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:04,475 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 02:04:04,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 43 [2022-11-03 02:04:04,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:04,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:04,538 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:04:04,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 02:04:04,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:04:04,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:04:04,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:04:04,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:04:05,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:04:05,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 34 [2022-11-03 02:04:05,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:04:05,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 02:04:05,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 02:04:05,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 15 [2022-11-03 02:04:05,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 02:04:05,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 02:04:05,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:04:05,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:04:05,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:04:05,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:04:05,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:04:05,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:04:05,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 34 [2022-11-03 02:04:05,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 02:04:05,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 02:04:05,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 02:04:05,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 15 [2022-11-03 02:04:05,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 02:04:05,969 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 78 for LOIs [2022-11-03 02:04:06,016 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:04:08,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [660017145] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:08,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:04:08,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [4, 4] total 17 [2022-11-03 02:04:08,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034677799] [2022-11-03 02:04:08,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:08,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:04:08,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:04:08,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:04:08,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:04:08,114 INFO L87 Difference]: Start difference. First operand 161 states and 194 transitions. Second operand has 13 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:04:16,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:16,825 INFO L93 Difference]: Finished difference Result 321 states and 391 transitions. [2022-11-03 02:04:16,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:04:16,826 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-11-03 02:04:16,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:16,828 INFO L225 Difference]: With dead ends: 321 [2022-11-03 02:04:16,828 INFO L226 Difference]: Without dead ends: 172 [2022-11-03 02:04:16,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 203 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:04:16,830 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 11 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:16,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 612 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 269 Invalid, 0 Unknown, 97 Unchecked, 6.4s Time] [2022-11-03 02:04:16,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-03 02:04:16,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 166. [2022-11-03 02:04:16,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 150 states have (on average 1.1733333333333333) internal successors, (176), 156 states have internal predecessors, (176), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-03 02:04:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 200 transitions. [2022-11-03 02:04:16,852 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 200 transitions. Word has length 74 [2022-11-03 02:04:16,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:16,852 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 200 transitions. [2022-11-03 02:04:16,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:04:16,853 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 200 transitions. [2022-11-03 02:04:16,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 02:04:16,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:16,855 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:04:16,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:17,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:17,067 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:17,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:17,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1702322456, now seen corresponding path program 1 times [2022-11-03 02:04:17,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:17,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841424489] [2022-11-03 02:04:17,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:17,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:17,321 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:04:17,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946679148] [2022-11-03 02:04:17,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:17,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:17,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:17,326 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:17,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:04:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:18,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 2264 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:04:18,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:04:18,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:04:18,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:18,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841424489] [2022-11-03 02:04:18,912 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:04:18,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946679148] [2022-11-03 02:04:18,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946679148] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:18,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1420255927] [2022-11-03 02:04:18,916 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-03 02:04:18,916 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:04:18,917 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:04:18,917 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:04:18,917 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:04:19,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:19,027 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:04:19,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 02:04:19,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:19,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 02:04:19,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:19,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:19,116 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:04:19,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 02:04:19,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:19,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:04:19,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:19,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:19,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-03 02:04:19,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:19,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:04:19,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2022-11-03 02:04:19,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:19,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:04:19,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:04:19,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:04:19,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:04:19,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:04:19,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:04:19,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:04:19,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 02:04:19,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 02:04:19,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 02:04:19,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 15 [2022-11-03 02:04:19,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 02:04:19,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 02:04:19,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 02:04:19,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:04:19,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:04:19,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:19,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 65 [2022-11-03 02:04:19,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2022-11-03 02:04:19,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2022-11-03 02:04:19,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:19,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:04:19,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:04:19,890 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:04:19,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 02:04:19,908 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:04:19,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 30 [2022-11-03 02:04:19,930 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:04:19,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 16 [2022-11-03 02:04:20,019 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:04:20,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 30 [2022-11-03 02:04:20,048 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:04:20,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 16 [2022-11-03 02:04:20,065 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:04:20,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 02:04:31,117 WARN L234 SmtUtils]: Spent 10.87s on a formula simplification. DAG size of input: 67 DAG size of output: 32 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:04:31,118 INFO L356 Elim1Store]: treesize reduction 340, result has 16.0 percent of original size [2022-11-03 02:04:31,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:31,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:31,327 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: var is still there: |v_#memory_$Pointer$.base_670| input size 140 context size 140 output size 140 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:364) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:427) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:190) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 02:04:31,330 INFO L158 Benchmark]: Toolchain (without parser) took 57694.84ms. Allocated memory was 121.6MB in the beginning and 423.6MB in the end (delta: 302.0MB). Free memory was 75.1MB in the beginning and 300.1MB in the end (delta: -224.9MB). Peak memory consumption was 76.1MB. Max. memory is 16.1GB. [2022-11-03 02:04:31,330 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 121.6MB. Free memory is still 94.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:04:31,331 INFO L158 Benchmark]: CACSL2BoogieTranslator took 924.34ms. Allocated memory is still 121.6MB. Free memory was 74.9MB in the beginning and 63.3MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 02:04:31,331 INFO L158 Benchmark]: Boogie Procedure Inliner took 180.18ms. Allocated memory is still 121.6MB. Free memory was 63.3MB in the beginning and 51.2MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 02:04:31,331 INFO L158 Benchmark]: Boogie Preprocessor took 253.57ms. Allocated memory was 121.6MB in the beginning and 174.1MB in the end (delta: 52.4MB). Free memory was 51.2MB in the beginning and 136.3MB in the end (delta: -85.0MB). Peak memory consumption was 23.6MB. Max. memory is 16.1GB. [2022-11-03 02:04:31,332 INFO L158 Benchmark]: RCFGBuilder took 3880.59ms. Allocated memory was 174.1MB in the beginning and 220.2MB in the end (delta: 46.1MB). Free memory was 136.3MB in the beginning and 164.4MB in the end (delta: -28.1MB). Peak memory consumption was 113.3MB. Max. memory is 16.1GB. [2022-11-03 02:04:31,332 INFO L158 Benchmark]: TraceAbstraction took 52448.35ms. Allocated memory was 220.2MB in the beginning and 423.6MB in the end (delta: 203.4MB). Free memory was 163.3MB in the beginning and 300.1MB in the end (delta: -136.7MB). Peak memory consumption was 66.2MB. Max. memory is 16.1GB. [2022-11-03 02:04:31,334 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 121.6MB. Free memory is still 94.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 924.34ms. Allocated memory is still 121.6MB. Free memory was 74.9MB in the beginning and 63.3MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 180.18ms. Allocated memory is still 121.6MB. Free memory was 63.3MB in the beginning and 51.2MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 253.57ms. Allocated memory was 121.6MB in the beginning and 174.1MB in the end (delta: 52.4MB). Free memory was 51.2MB in the beginning and 136.3MB in the end (delta: -85.0MB). Peak memory consumption was 23.6MB. Max. memory is 16.1GB. * RCFGBuilder took 3880.59ms. Allocated memory was 174.1MB in the beginning and 220.2MB in the end (delta: 46.1MB). Free memory was 136.3MB in the beginning and 164.4MB in the end (delta: -28.1MB). Peak memory consumption was 113.3MB. Max. memory is 16.1GB. * TraceAbstraction took 52448.35ms. Allocated memory was 220.2MB in the beginning and 423.6MB in the end (delta: 203.4MB). Free memory was 163.3MB in the beginning and 300.1MB in the end (delta: -136.7MB). Peak memory consumption was 66.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: var is still there: |v_#memory_$Pointer$.base_670| input size 140 context size 140 output size 140 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: var is still there: |v_#memory_$Pointer$.base_670| input size 140 context size 140 output size 140: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:364) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 02:04:31,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/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_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/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_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/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 32bit --witnessprinter.graph.data.programhash 94599b38b669e42115f92cee257d9ed4ed5d4777dca7d2ee690bacb4e0d226f0 --- 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 02:04:33,824 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:04:33,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:04:33,896 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:04:33,897 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:04:33,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:04:33,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:04:33,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:04:33,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:04:33,919 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:04:33,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:04:33,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:04:33,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:04:33,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:04:33,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:04:33,933 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:04:33,935 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:04:33,943 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:04:33,945 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:04:33,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:04:33,953 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:04:33,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:04:33,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:04:33,966 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:04:33,970 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:04:33,972 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:04:33,972 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:04:33,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:04:33,976 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:04:33,977 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:04:33,977 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:04:33,978 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:04:33,980 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:04:33,982 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:04:33,983 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:04:33,983 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:04:33,984 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:04:33,985 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:04:33,985 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:04:33,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:04:33,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:04:33,992 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 02:04:34,037 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:04:34,038 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:04:34,039 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:04:34,040 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:04:34,041 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:04:34,042 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:04:34,042 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:04:34,042 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:04:34,043 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:04:34,043 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:04:34,044 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:04:34,045 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:04:34,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:04:34,047 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:04:34,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:04:34,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:04:34,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:04:34,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:04:34,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:04:34,049 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:04:34,049 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:04:34,050 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:04:34,050 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:04:34,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:04:34,050 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:04:34,051 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:04:34,051 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:04:34,051 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:04:34,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:04:34,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:04:34,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:04:34,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:04:34,053 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:04:34,053 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:04:34,054 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:04:34,054 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:04:34,054 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:04:34,055 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:04:34,055 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_e31fa478-e888-466d-bf33-716c21449b83/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94599b38b669e42115f92cee257d9ed4ed5d4777dca7d2ee690bacb4e0d226f0 [2022-11-03 02:04:34,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:04:34,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:04:34,491 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:04:34,493 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:04:34,499 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:04:34,501 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i [2022-11-03 02:04:34,580 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/data/817dc1fba/61f48f1f11f9404ca341ff35a93bc381/FLAG8ed8cdb69 [2022-11-03 02:04:35,318 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:04:35,318 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i [2022-11-03 02:04:35,339 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/data/817dc1fba/61f48f1f11f9404ca341ff35a93bc381/FLAG8ed8cdb69 [2022-11-03 02:04:35,559 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/data/817dc1fba/61f48f1f11f9404ca341ff35a93bc381 [2022-11-03 02:04:35,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:04:35,567 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:04:35,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:04:35,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:04:35,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:04:35,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:04:35" (1/1) ... [2022-11-03 02:04:35,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b069684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:35, skipping insertion in model container [2022-11-03 02:04:35,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:04:35" (1/1) ... [2022-11-03 02:04:35,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:04:35,676 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:04:36,339 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_e31fa478-e888-466d-bf33-716c21449b83/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i[33021,33034] [2022-11-03 02:04:36,525 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_e31fa478-e888-466d-bf33-716c21449b83/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i[49681,49694] [2022-11-03 02:04:36,549 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:04:36,565 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 02:04:36,587 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:04:36,603 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_e31fa478-e888-466d-bf33-716c21449b83/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i[33021,33034] [2022-11-03 02:04:36,693 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_e31fa478-e888-466d-bf33-716c21449b83/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i[49681,49694] [2022-11-03 02:04:36,709 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:04:36,714 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:04:36,743 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_e31fa478-e888-466d-bf33-716c21449b83/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i[33021,33034] [2022-11-03 02:04:36,841 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_e31fa478-e888-466d-bf33-716c21449b83/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i[49681,49694] [2022-11-03 02:04:36,889 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:04:36,942 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:04:36,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:36 WrapperNode [2022-11-03 02:04:36,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:04:36,946 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:04:36,947 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:04:36,947 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:04:36,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:36" (1/1) ... [2022-11-03 02:04:37,023 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:36" (1/1) ... [2022-11-03 02:04:37,150 INFO L138 Inliner]: procedures = 180, calls = 487, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1694 [2022-11-03 02:04:37,151 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:04:37,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:04:37,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:04:37,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:04:37,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:36" (1/1) ... [2022-11-03 02:04:37,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:36" (1/1) ... [2022-11-03 02:04:37,190 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:36" (1/1) ... [2022-11-03 02:04:37,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:36" (1/1) ... [2022-11-03 02:04:37,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:36" (1/1) ... [2022-11-03 02:04:37,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:36" (1/1) ... [2022-11-03 02:04:37,343 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:36" (1/1) ... [2022-11-03 02:04:37,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:36" (1/1) ... [2022-11-03 02:04:37,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:04:37,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:04:37,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:04:37,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:04:37,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:36" (1/1) ... [2022-11-03 02:04:37,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:04:37,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:37,421 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:04:37,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:04:37,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-03 02:04:37,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-03 02:04:37,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:04:37,486 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:04:37,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 02:04:37,487 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 02:04:37,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:04:37,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:04:37,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:04:37,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:04:37,488 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-03 02:04:37,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:04:37,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:04:37,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-03 02:04:37,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:04:37,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:04:37,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:04:37,887 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:04:37,889 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:04:50,338 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:04:50,350 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:04:50,350 INFO L300 CfgBuilder]: Removed 100 assume(true) statements. [2022-11-03 02:04:50,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:04:50 BoogieIcfgContainer [2022-11-03 02:04:50,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:04:50,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:04:50,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:04:50,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:04:50,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:04:35" (1/3) ... [2022-11-03 02:04:50,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ea5894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:04:50, skipping insertion in model container [2022-11-03 02:04:50,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:36" (2/3) ... [2022-11-03 02:04:50,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ea5894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:04:50, skipping insertion in model container [2022-11-03 02:04:50,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:04:50" (3/3) ... [2022-11-03 02:04:50,363 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test5-3.i [2022-11-03 02:04:50,385 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:04:50,386 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 02:04:50,452 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:04:50,459 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;@65d29be4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:04:50,459 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 02:04:50,465 INFO L276 IsEmpty]: Start isEmpty. Operand has 308 states, 292 states have (on average 1.702054794520548) internal successors, (497), 299 states have internal predecessors, (497), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 02:04:50,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 02:04:50,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:50,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:50,474 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:50,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:50,480 INFO L85 PathProgramCache]: Analyzing trace with hash 691392686, now seen corresponding path program 1 times [2022-11-03 02:04:50,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:04:50,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819591242] [2022-11-03 02:04:50,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:50,493 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:04:50,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:04:50,498 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:04:50,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:04:50,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:50,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 02:04:50,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:50,797 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 02:04:50,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:04:50,798 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:04:50,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819591242] [2022-11-03 02:04:50,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819591242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:50,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:04:50,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:04:50,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985032222] [2022-11-03 02:04:50,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:50,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:04:50,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:04:50,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:04:50,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:04:50,870 INFO L87 Difference]: Start difference. First operand has 308 states, 292 states have (on average 1.702054794520548) internal successors, (497), 299 states have internal predecessors, (497), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 02:04:50,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:50,942 INFO L93 Difference]: Finished difference Result 614 states and 1041 transitions. [2022-11-03 02:04:50,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:04:50,945 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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) Word has length 8 [2022-11-03 02:04:50,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:50,959 INFO L225 Difference]: With dead ends: 614 [2022-11-03 02:04:50,959 INFO L226 Difference]: Without dead ends: 254 [2022-11-03 02:04:50,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:04:50,969 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:50,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:04:50,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-11-03 02:04:51,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-11-03 02:04:51,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 239 states have (on average 1.3179916317991631) internal successors, (315), 245 states have internal predecessors, (315), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 02:04:51,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 337 transitions. [2022-11-03 02:04:51,031 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 337 transitions. Word has length 8 [2022-11-03 02:04:51,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:51,031 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 337 transitions. [2022-11-03 02:04:51,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 02:04:51,032 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 337 transitions. [2022-11-03 02:04:51,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 02:04:51,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:51,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:51,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:51,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:04:51,249 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:51,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:51,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1622673081, now seen corresponding path program 1 times [2022-11-03 02:04:51,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:04:51,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999384724] [2022-11-03 02:04:51,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:51,252 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:04:51,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:04:51,254 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:04:51,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:04:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:51,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:04:51,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:51,700 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 02:04:51,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:04:51,710 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:04:51,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999384724] [2022-11-03 02:04:51,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999384724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:51,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:04:51,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:04:51,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719010719] [2022-11-03 02:04:51,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:51,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:04:51,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:04:51,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:04:51,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:04:51,715 INFO L87 Difference]: Start difference. First operand 254 states and 337 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:52,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:52,056 INFO L93 Difference]: Finished difference Result 573 states and 768 transitions. [2022-11-03 02:04:52,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:04:52,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2022-11-03 02:04:52,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:52,066 INFO L225 Difference]: With dead ends: 573 [2022-11-03 02:04:52,072 INFO L226 Difference]: Without dead ends: 495 [2022-11-03 02:04:52,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:04:52,074 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 300 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:52,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 701 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:04:52,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-11-03 02:04:52,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 255. [2022-11-03 02:04:52,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 240 states have (on average 1.3166666666666667) internal successors, (316), 246 states have internal predecessors, (316), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 02:04:52,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 338 transitions. [2022-11-03 02:04:52,122 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 338 transitions. Word has length 42 [2022-11-03 02:04:52,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:52,123 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 338 transitions. [2022-11-03 02:04:52,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:52,123 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 338 transitions. [2022-11-03 02:04:52,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-03 02:04:52,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:52,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:04:52,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:52,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:04:52,343 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:52,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:52,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1488765968, now seen corresponding path program 1 times [2022-11-03 02:04:52,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:04:52,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187230280] [2022-11-03 02:04:52,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:52,346 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:04:52,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:04:52,347 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:04:52,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:04:54,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:54,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 2104 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:04:54,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:54,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:04:54,988 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:04:54,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187230280] [2022-11-03 02:04:54,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187230280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:54,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:04:54,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:04:54,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404826805] [2022-11-03 02:04:54,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:54,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:04:54,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:04:54,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:04:54,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:04:54,993 INFO L87 Difference]: Start difference. First operand 255 states and 338 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:55,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:55,176 INFO L93 Difference]: Finished difference Result 516 states and 685 transitions. [2022-11-03 02:04:55,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:04:55,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 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 140 [2022-11-03 02:04:55,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:55,179 INFO L225 Difference]: With dead ends: 516 [2022-11-03 02:04:55,179 INFO L226 Difference]: Without dead ends: 264 [2022-11-03 02:04:55,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 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 02:04:55,182 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 291 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:55,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 643 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:04:55,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-11-03 02:04:55,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 258. [2022-11-03 02:04:55,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 243 states have (on average 1.2798353909465021) internal successors, (311), 249 states have internal predecessors, (311), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 02:04:55,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 333 transitions. [2022-11-03 02:04:55,205 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 333 transitions. Word has length 140 [2022-11-03 02:04:55,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:55,205 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 333 transitions. [2022-11-03 02:04:55,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:55,206 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 333 transitions. [2022-11-03 02:04:55,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-03 02:04:55,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:55,210 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:04:55,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:55,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:04:55,435 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:55,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:55,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1835639812, now seen corresponding path program 1 times [2022-11-03 02:04:55,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:04:55,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441328874] [2022-11-03 02:04:55,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:55,438 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:04:55,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:04:55,440 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:04:55,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:04:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:57,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 2098 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:04:57,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:58,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:58,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:04:58,192 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:04:58,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441328874] [2022-11-03 02:04:58,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441328874] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:58,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:04:58,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:04:58,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490955066] [2022-11-03 02:04:58,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:58,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:04:58,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:04:58,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:04:58,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:04:58,197 INFO L87 Difference]: Start difference. First operand 258 states and 333 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:58,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:58,920 INFO L93 Difference]: Finished difference Result 554 states and 709 transitions. [2022-11-03 02:04:58,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:04:58,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 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 140 [2022-11-03 02:04:58,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:58,940 INFO L225 Difference]: With dead ends: 554 [2022-11-03 02:04:58,941 INFO L226 Difference]: Without dead ends: 299 [2022-11-03 02:04:58,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:04:58,943 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 11 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:58,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 635 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:04:58,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-03 02:04:58,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-11-03 02:04:58,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 284 states have (on average 1.2535211267605635) internal successors, (356), 290 states have internal predecessors, (356), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 02:04:58,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 378 transitions. [2022-11-03 02:04:58,964 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 378 transitions. Word has length 140 [2022-11-03 02:04:58,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:58,964 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 378 transitions. [2022-11-03 02:04:58,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:58,965 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 378 transitions. [2022-11-03 02:04:58,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 02:04:58,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:58,969 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:04:59,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:59,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:04:59,183 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:59,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:59,184 INFO L85 PathProgramCache]: Analyzing trace with hash -785399131, now seen corresponding path program 1 times [2022-11-03 02:04:59,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:04:59,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707511872] [2022-11-03 02:04:59,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:59,186 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:04:59,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:04:59,189 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:04:59,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:05:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:01,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:05:01,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:01,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:01,166 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:01,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707511872] [2022-11-03 02:05:01,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1707511872] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:01,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:01,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:05:01,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579849625] [2022-11-03 02:05:01,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:01,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:05:01,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:05:01,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:05:01,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:05:01,172 INFO L87 Difference]: Start difference. First operand 299 states and 378 transitions. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:05:01,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:01,308 INFO L93 Difference]: Finished difference Result 557 states and 717 transitions. [2022-11-03 02:05:01,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:05:01,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 155 [2022-11-03 02:05:01,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:01,311 INFO L225 Difference]: With dead ends: 557 [2022-11-03 02:05:01,312 INFO L226 Difference]: Without dead ends: 302 [2022-11-03 02:05:01,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 152 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 02:05:01,314 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 2 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:01,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 959 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:05:01,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-11-03 02:05:01,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2022-11-03 02:05:01,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 286 states have (on average 1.2552447552447552) internal successors, (359), 293 states have internal predecessors, (359), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (13), 7 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-03 02:05:01,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 383 transitions. [2022-11-03 02:05:01,337 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 383 transitions. Word has length 155 [2022-11-03 02:05:01,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:01,337 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 383 transitions. [2022-11-03 02:05:01,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:05:01,338 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 383 transitions. [2022-11-03 02:05:01,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-03 02:05:01,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:01,342 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:05:01,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:01,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:05:01,564 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:01,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:01,565 INFO L85 PathProgramCache]: Analyzing trace with hash 332262663, now seen corresponding path program 1 times [2022-11-03 02:05:01,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:05:01,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239353935] [2022-11-03 02:05:01,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:01,567 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:05:01,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:05:01,569 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:05:01,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:05:03,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:03,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:05:03,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:03,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:05:03,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:04,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:05:04,010 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:04,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239353935] [2022-11-03 02:05:04,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239353935] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:04,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1736124856] [2022-11-03 02:05:04,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:04,011 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:05:04,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:05:04,015 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:05:04,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-03 02:05:06,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:06,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:05:06,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:06,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:05:06,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:06,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1736124856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:06,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:05:06,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2022-11-03 02:05:06,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649062678] [2022-11-03 02:05:06,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:06,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:05:06,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:05:06,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:05:06,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:05:06,548 INFO L87 Difference]: Start difference. First operand 302 states and 383 transitions. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:05:06,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:06,740 INFO L93 Difference]: Finished difference Result 618 states and 797 transitions. [2022-11-03 02:05:06,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:05:06,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 157 [2022-11-03 02:05:06,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:06,744 INFO L225 Difference]: With dead ends: 618 [2022-11-03 02:05:06,744 INFO L226 Difference]: Without dead ends: 360 [2022-11-03 02:05:06,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:05:06,746 INFO L413 NwaCegarLoop]: 399 mSDtfsCounter, 282 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:06,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 909 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:05:06,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-11-03 02:05:06,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 311. [2022-11-03 02:05:06,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 295 states have (on average 1.230508474576271) internal successors, (363), 302 states have internal predecessors, (363), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (13), 7 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-03 02:05:06,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 387 transitions. [2022-11-03 02:05:06,767 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 387 transitions. Word has length 157 [2022-11-03 02:05:06,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:06,767 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 387 transitions. [2022-11-03 02:05:06,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:05:06,768 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 387 transitions. [2022-11-03 02:05:06,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-03 02:05:06,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:06,771 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:05:06,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-03 02:05:07,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:07,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:05:07,191 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:07,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:07,192 INFO L85 PathProgramCache]: Analyzing trace with hash 2018442501, now seen corresponding path program 1 times [2022-11-03 02:05:07,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:05:07,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498837198] [2022-11-03 02:05:07,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:07,194 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:05:07,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:05:07,195 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:05:07,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:05:09,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:09,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 1773 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:05:09,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:05:09,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:09,764 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:05:09,765 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:09,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498837198] [2022-11-03 02:05:09,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498837198] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:09,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [124604013] [2022-11-03 02:05:09,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:09,766 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:05:09,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:05:09,771 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:05:09,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-03 02:05:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:12,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 1773 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:05:12,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:05:12,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:12,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [124604013] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:12,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:05:12,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-03 02:05:12,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188739005] [2022-11-03 02:05:12,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:12,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:05:12,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:05:12,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:05:12,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:05:12,894 INFO L87 Difference]: Start difference. First operand 311 states and 387 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:05:13,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:13,832 INFO L93 Difference]: Finished difference Result 805 states and 1018 transitions. [2022-11-03 02:05:13,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:05:13,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 157 [2022-11-03 02:05:13,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:13,838 INFO L225 Difference]: With dead ends: 805 [2022-11-03 02:05:13,838 INFO L226 Difference]: Without dead ends: 538 [2022-11-03 02:05:13,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:05:13,840 INFO L413 NwaCegarLoop]: 453 mSDtfsCounter, 225 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:13,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 741 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:05:13,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-11-03 02:05:13,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 536. [2022-11-03 02:05:13,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 511 states have (on average 1.2367906066536203) internal successors, (632), 523 states have internal predecessors, (632), 20 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (24), 12 states have call predecessors, (24), 20 states have call successors, (24) [2022-11-03 02:05:13,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 676 transitions. [2022-11-03 02:05:13,886 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 676 transitions. Word has length 157 [2022-11-03 02:05:13,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:13,887 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 676 transitions. [2022-11-03 02:05:13,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:05:13,888 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 676 transitions. [2022-11-03 02:05:13,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-03 02:05:13,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:13,890 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:05:13,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:14,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:14,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:05:14,299 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:14,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:14,299 INFO L85 PathProgramCache]: Analyzing trace with hash 2036193863, now seen corresponding path program 1 times [2022-11-03 02:05:14,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:05:14,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986425873] [2022-11-03 02:05:14,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:14,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:05:14,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:05:14,301 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:05:14,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:05:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:16,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 1788 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:05:16,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:16,676 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:05:16,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:05:16,819 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:16,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986425873] [2022-11-03 02:05:16,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986425873] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:16,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [604530582] [2022-11-03 02:05:16,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:16,820 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:05:16,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:05:16,823 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:05:16,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-03 02:05:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:19,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 1788 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:05:19,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:05:20,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:20,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [604530582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:20,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:05:20,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-03 02:05:20,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703021500] [2022-11-03 02:05:20,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:20,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:05:20,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:05:20,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:05:20,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:05:20,731 INFO L87 Difference]: Start difference. First operand 536 states and 676 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:05:21,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:21,239 INFO L93 Difference]: Finished difference Result 923 states and 1166 transitions. [2022-11-03 02:05:21,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:05:21,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 164 [2022-11-03 02:05:21,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:21,252 INFO L225 Difference]: With dead ends: 923 [2022-11-03 02:05:21,253 INFO L226 Difference]: Without dead ends: 665 [2022-11-03 02:05:21,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:05:21,255 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 85 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:21,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 669 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:05:21,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-11-03 02:05:21,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 663. [2022-11-03 02:05:21,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 635 states have (on average 1.2377952755905512) internal successors, (786), 647 states have internal predecessors, (786), 23 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (28), 15 states have call predecessors, (28), 23 states have call successors, (28) [2022-11-03 02:05:21,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 837 transitions. [2022-11-03 02:05:21,307 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 837 transitions. Word has length 164 [2022-11-03 02:05:21,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:21,307 INFO L495 AbstractCegarLoop]: Abstraction has 663 states and 837 transitions. [2022-11-03 02:05:21,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:05:21,308 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 837 transitions. [2022-11-03 02:05:21,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-03 02:05:21,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:21,312 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:05:21,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:21,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:21,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:05:21,732 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:21,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:21,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1455638758, now seen corresponding path program 1 times [2022-11-03 02:05:21,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:05:21,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891184192] [2022-11-03 02:05:21,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:21,734 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:05:21,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:05:21,736 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:05:21,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:05:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:23,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 1447 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:05:23,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:05:23,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:23,836 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:05:23,836 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:23,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891184192] [2022-11-03 02:05:23,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891184192] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:23,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1285848745] [2022-11-03 02:05:23,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:23,837 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:05:23,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:05:23,839 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:05:23,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-03 02:05:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:26,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 1447 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:05:26,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:26,417 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 02:05:26,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:26,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1285848745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:26,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:05:26,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-03 02:05:26,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571728831] [2022-11-03 02:05:26,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:26,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:05:26,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:05:26,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:05:26,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:05:26,420 INFO L87 Difference]: Start difference. First operand 663 states and 837 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:05:26,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:26,575 INFO L93 Difference]: Finished difference Result 881 states and 1145 transitions. [2022-11-03 02:05:26,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:05:26,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 174 [2022-11-03 02:05:26,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:26,579 INFO L225 Difference]: With dead ends: 881 [2022-11-03 02:05:26,580 INFO L226 Difference]: Without dead ends: 726 [2022-11-03 02:05:26,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:05:26,581 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 6 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:26,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 581 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:05:26,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-11-03 02:05:26,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 723. [2022-11-03 02:05:26,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 695 states have (on average 1.2172661870503596) internal successors, (846), 707 states have internal predecessors, (846), 23 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (28), 15 states have call predecessors, (28), 23 states have call successors, (28) [2022-11-03 02:05:26,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 897 transitions. [2022-11-03 02:05:26,638 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 897 transitions. Word has length 174 [2022-11-03 02:05:26,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:26,639 INFO L495 AbstractCegarLoop]: Abstraction has 723 states and 897 transitions. [2022-11-03 02:05:26,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:05:26,639 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 897 transitions. [2022-11-03 02:05:26,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-03 02:05:26,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:26,642 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:05:26,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:26,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:27,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:05:27,059 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:27,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:27,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1236784040, now seen corresponding path program 1 times [2022-11-03 02:05:27,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:05:27,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887370779] [2022-11-03 02:05:27,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:27,060 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:05:27,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:05:27,061 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:05:27,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:05:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:28,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 1448 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:05:28,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:05:29,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:29,192 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:05:29,192 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:29,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887370779] [2022-11-03 02:05:29,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887370779] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:29,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1349983771] [2022-11-03 02:05:29,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:29,193 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:05:29,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:05:29,199 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:05:29,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-03 02:05:31,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:31,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 1448 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:05:31,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:05:32,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:32,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1349983771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:32,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:05:32,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2022-11-03 02:05:32,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062828229] [2022-11-03 02:05:32,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:32,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:05:32,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:05:32,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:05:32,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:05:32,025 INFO L87 Difference]: Start difference. First operand 723 states and 897 transitions. Second operand has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:05:32,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:32,145 INFO L93 Difference]: Finished difference Result 1303 states and 1625 transitions. [2022-11-03 02:05:32,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:05:32,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 174 [2022-11-03 02:05:32,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:32,149 INFO L225 Difference]: With dead ends: 1303 [2022-11-03 02:05:32,150 INFO L226 Difference]: Without dead ends: 687 [2022-11-03 02:05:32,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 510 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:05:32,152 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 275 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:32,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 904 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:05:32,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-11-03 02:05:32,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 687. [2022-11-03 02:05:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 659 states have (on average 1.197268588770865) internal successors, (789), 671 states have internal predecessors, (789), 23 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (28), 15 states have call predecessors, (28), 23 states have call successors, (28) [2022-11-03 02:05:32,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 840 transitions. [2022-11-03 02:05:32,189 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 840 transitions. Word has length 174 [2022-11-03 02:05:32,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:32,189 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 840 transitions. [2022-11-03 02:05:32,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:05:32,190 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 840 transitions. [2022-11-03 02:05:32,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-03 02:05:32,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:32,192 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:05:32,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:32,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-11-03 02:05:32,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:05:32,619 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:32,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:32,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1803511196, now seen corresponding path program 1 times [2022-11-03 02:05:32,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:05:32,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964505485] [2022-11-03 02:05:32,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:32,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:05:32,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:05:32,622 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:05:32,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:05:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:34,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:05:34,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:05:34,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:05:34,823 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:34,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964505485] [2022-11-03 02:05:34,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964505485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:34,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1489729679] [2022-11-03 02:05:34,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:34,823 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:05:34,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:05:34,824 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:05:34,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-03 02:05:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:37,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:05:37,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-03 02:05:38,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:38,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1489729679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:38,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:05:38,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2022-11-03 02:05:38,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076180510] [2022-11-03 02:05:38,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:38,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:05:38,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:05:38,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:05:38,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:05:38,175 INFO L87 Difference]: Start difference. First operand 687 states and 840 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:05:40,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:05:43,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:05:45,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:05:48,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:05:50,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:50,259 INFO L93 Difference]: Finished difference Result 1496 states and 1835 transitions. [2022-11-03 02:05:50,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:05:50,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 174 [2022-11-03 02:05:50,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:50,271 INFO L225 Difference]: With dead ends: 1496 [2022-11-03 02:05:50,272 INFO L226 Difference]: Without dead ends: 931 [2022-11-03 02:05:50,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 511 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:05:50,274 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 543 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:50,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 623 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 149 Invalid, 2 Unknown, 0 Unchecked, 12.0s Time] [2022-11-03 02:05:50,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-11-03 02:05:50,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 554. [2022-11-03 02:05:50,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 531 states have (on average 1.1864406779661016) internal successors, (630), 538 states have internal predecessors, (630), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (23), 14 states have call predecessors, (23), 18 states have call successors, (23) [2022-11-03 02:05:50,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 671 transitions. [2022-11-03 02:05:50,314 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 671 transitions. Word has length 174 [2022-11-03 02:05:50,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:50,315 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 671 transitions. [2022-11-03 02:05:50,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:05:50,315 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 671 transitions. [2022-11-03 02:05:50,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-03 02:05:50,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:50,317 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:05:50,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:50,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:50,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:05:50,739 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:50,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:50,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1345972688, now seen corresponding path program 1 times [2022-11-03 02:05:50,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:05:50,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212311362] [2022-11-03 02:05:50,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:50,740 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:05:50,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:05:50,741 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:05:50,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:05:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:52,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 1457 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:05:52,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:05:52,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:05:53,066 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:53,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212311362] [2022-11-03 02:05:53,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212311362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:53,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [556795277] [2022-11-03 02:05:53,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:53,067 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:05:53,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:05:53,071 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:05:53,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-03 02:05:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:56,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 1457 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:05:56,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:56,195 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 02:05:56,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:56,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [556795277] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:56,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:05:56,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2022-11-03 02:05:56,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636641840] [2022-11-03 02:05:56,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:56,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:05:56,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:05:56,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:05:56,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:05:56,197 INFO L87 Difference]: Start difference. First operand 554 states and 671 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:05:56,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:56,358 INFO L93 Difference]: Finished difference Result 639 states and 783 transitions. [2022-11-03 02:05:56,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:05:56,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 181 [2022-11-03 02:05:56,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:56,362 INFO L225 Difference]: With dead ends: 639 [2022-11-03 02:05:56,362 INFO L226 Difference]: Without dead ends: 542 [2022-11-03 02:05:56,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:05:56,363 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 79 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:56,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 774 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:05:56,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-11-03 02:05:56,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 537. [2022-11-03 02:05:56,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 514 states have (on average 1.171206225680934) internal successors, (602), 521 states have internal predecessors, (602), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (23), 14 states have call predecessors, (23), 18 states have call successors, (23) [2022-11-03 02:05:56,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 643 transitions. [2022-11-03 02:05:56,410 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 643 transitions. Word has length 181 [2022-11-03 02:05:56,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:56,411 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 643 transitions. [2022-11-03 02:05:56,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:05:56,412 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 643 transitions. [2022-11-03 02:05:56,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-03 02:05:56,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:56,413 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:05:56,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:56,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:56,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:05:56,839 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:56,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:56,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1040191010, now seen corresponding path program 1 times [2022-11-03 02:05:56,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:05:56,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059647831] [2022-11-03 02:05:56,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:56,840 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:05:56,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:05:56,841 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:05:56,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:05:58,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:58,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:05:58,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:59,005 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:05:59,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:05:59,123 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:59,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059647831] [2022-11-03 02:05:59,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059647831] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:59,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [311984218] [2022-11-03 02:05:59,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:59,124 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:05:59,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:05:59,125 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:05:59,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-03 02:06:02,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:03,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:06:03,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:03,050 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:06:03,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:06:03,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [311984218] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:03,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119275648] [2022-11-03 02:06:03,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:03,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:03,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:03,119 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:03,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-03 02:06:05,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:05,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:06:05,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:05,551 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-03 02:06:05,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:06,015 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-03 02:06:06,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119275648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:06,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:06:06,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 4, 4] total 12 [2022-11-03 02:06:06,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546279053] [2022-11-03 02:06:06,016 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:06:06,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 02:06:06,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:06:06,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 02:06:06,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:06:06,019 INFO L87 Difference]: Start difference. First operand 537 states and 643 transitions. Second operand has 12 states, 12 states have (on average 32.75) internal successors, (393), 12 states have internal predecessors, (393), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:06:07,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:07,793 INFO L93 Difference]: Finished difference Result 1837 states and 2277 transitions. [2022-11-03 02:06:07,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:06:07,794 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 32.75) internal successors, (393), 12 states have internal predecessors, (393), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 181 [2022-11-03 02:06:07,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:07,802 INFO L225 Difference]: With dead ends: 1837 [2022-11-03 02:06:07,802 INFO L226 Difference]: Without dead ends: 1347 [2022-11-03 02:06:07,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1087 GetRequests, 1071 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:06:07,805 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 1270 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1306 SdHoareTripleChecker+Valid, 2464 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:07,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1306 Valid, 2464 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 02:06:07,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2022-11-03 02:06:07,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1197. [2022-11-03 02:06:07,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1152 states have (on average 1.1822916666666667) internal successors, (1362), 1159 states have internal predecessors, (1362), 39 states have call successors, (39), 3 states have call predecessors, (39), 4 states have return successors, (53), 35 states have call predecessors, (53), 39 states have call successors, (53) [2022-11-03 02:06:07,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1454 transitions. [2022-11-03 02:06:07,963 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1454 transitions. Word has length 181 [2022-11-03 02:06:07,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:07,964 INFO L495 AbstractCegarLoop]: Abstraction has 1197 states and 1454 transitions. [2022-11-03 02:06:07,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.75) internal successors, (393), 12 states have internal predecessors, (393), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:06:07,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1454 transitions. [2022-11-03 02:06:07,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2022-11-03 02:06:07,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:07,970 INFO L195 NwaCegarLoop]: trace histogram [12, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:06:08,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:08,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:08,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2022-11-03 02:06:08,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:06:08,599 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:08,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:08,600 INFO L85 PathProgramCache]: Analyzing trace with hash 620901029, now seen corresponding path program 1 times [2022-11-03 02:06:08,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:06:08,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857034039] [2022-11-03 02:06:08,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:08,602 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:06:08,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:06:08,603 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:06:08,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:06:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:19,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 7499 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:06:19,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:19,772 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 173 proven. 10 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2022-11-03 02:06:19,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 109 proven. 71 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2022-11-03 02:06:20,118 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:06:20,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857034039] [2022-11-03 02:06:20,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857034039] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:20,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [767144080] [2022-11-03 02:06:20,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:20,120 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:06:20,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:06:20,131 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:06:20,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-03 02:06:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:32,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 7499 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:06:32,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 173 proven. 10 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2022-11-03 02:06:32,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 109 proven. 71 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2022-11-03 02:06:32,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [767144080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:32,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944843988] [2022-11-03 02:06:32,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:32,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:32,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:33,003 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:33,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-03 02:06:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:43,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 7499 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:06:43,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 202 proven. 3 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2022-11-03 02:06:43,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-11-03 02:06:43,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944843988] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:43,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:06:43,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2022-11-03 02:06:43,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352887205] [2022-11-03 02:06:43,620 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:06:43,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:06:43,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:06:43,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:06:43,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:06:43,623 INFO L87 Difference]: Start difference. First operand 1197 states and 1454 transitions. Second operand has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:06:45,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:45,421 INFO L93 Difference]: Finished difference Result 2373 states and 3017 transitions. [2022-11-03 02:06:45,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 02:06:45,422 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 483 [2022-11-03 02:06:45,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:45,427 INFO L225 Difference]: With dead ends: 2373 [2022-11-03 02:06:45,427 INFO L226 Difference]: Without dead ends: 1217 [2022-11-03 02:06:45,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2917 GetRequests, 2874 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=554, Invalid=1426, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 02:06:45,431 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 155 mSDsluCounter, 2876 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 3172 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:45,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 3172 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:06:45,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2022-11-03 02:06:45,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1209. [2022-11-03 02:06:45,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1164 states have (on average 1.1838487972508591) internal successors, (1378), 1171 states have internal predecessors, (1378), 39 states have call successors, (39), 3 states have call predecessors, (39), 4 states have return successors, (53), 35 states have call predecessors, (53), 39 states have call successors, (53) [2022-11-03 02:06:45,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 1470 transitions. [2022-11-03 02:06:45,629 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 1470 transitions. Word has length 483 [2022-11-03 02:06:45,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:45,630 INFO L495 AbstractCegarLoop]: Abstraction has 1209 states and 1470 transitions. [2022-11-03 02:06:45,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:06:45,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 1470 transitions. [2022-11-03 02:06:45,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2022-11-03 02:06:45,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:45,637 INFO L195 NwaCegarLoop]: trace histogram [36, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:06:45,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:45,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:46,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:46,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:06:46,263 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:46,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:46,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1226269531, now seen corresponding path program 2 times [2022-11-03 02:06:46,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:06:46,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2094344091] [2022-11-03 02:06:46,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:06:46,265 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:06:46,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:06:46,267 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:06:46,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 02:06:58,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:06:58,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:06:58,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 7763 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:06:58,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:58,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 437 proven. 55 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-11-03 02:06:58,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 109 proven. 380 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2022-11-03 02:06:59,643 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:06:59,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2094344091] [2022-11-03 02:06:59,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2094344091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:59,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [855245717] [2022-11-03 02:06:59,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:06:59,644 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:06:59,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:06:59,647 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:06:59,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-03 02:07:14,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:07:14,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:07:14,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 7763 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:07:14,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 437 proven. 55 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-11-03 02:07:14,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 109 proven. 380 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2022-11-03 02:07:15,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [855245717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:15,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752145097] [2022-11-03 02:07:15,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:07:15,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:15,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:15,030 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:15,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-03 02:07:26,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:07:26,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:07:26,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 7763 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:07:26,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:27,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 580 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2022-11-03 02:07:27,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 580 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2022-11-03 02:07:29,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752145097] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:29,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:07:29,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 7, 7] total 36 [2022-11-03 02:07:29,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70744192] [2022-11-03 02:07:29,519 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:07:29,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:07:29,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:29,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:07:29,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1022, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:07:29,524 INFO L87 Difference]: Start difference. First operand 1209 states and 1470 transitions. Second operand has 36 states, 36 states have (on average 28.88888888888889) internal successors, (1040), 36 states have internal predecessors, (1040), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:07:51,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:51,168 INFO L93 Difference]: Finished difference Result 4740 states and 6254 transitions. [2022-11-03 02:07:51,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-03 02:07:51,170 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 28.88888888888889) internal successors, (1040), 36 states have internal predecessors, (1040), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 507 [2022-11-03 02:07:51,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:51,186 INFO L225 Difference]: With dead ends: 4740 [2022-11-03 02:07:51,186 INFO L226 Difference]: Without dead ends: 3574 [2022-11-03 02:07:51,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3075 GetRequests, 3006 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1091, Invalid=3879, Unknown=0, NotChecked=0, Total=4970 [2022-11-03 02:07:51,193 INFO L413 NwaCegarLoop]: 1253 mSDtfsCounter, 5275 mSDsluCounter, 19743 mSDsCounter, 0 mSdLazyCounter, 4895 mSolverCounterSat, 1461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5447 SdHoareTripleChecker+Valid, 20996 SdHoareTripleChecker+Invalid, 6356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1461 IncrementalHoareTripleChecker+Valid, 4895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:51,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5447 Valid, 20996 Invalid, 6356 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1461 Valid, 4895 Invalid, 0 Unknown, 0 Unchecked, 17.7s Time] [2022-11-03 02:07:51,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3574 states. [2022-11-03 02:07:51,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3574 to 3186. [2022-11-03 02:07:51,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3186 states, 3081 states have (on average 1.1775397598182409) internal successors, (3628), 3088 states have internal predecessors, (3628), 99 states have call successors, (99), 3 states have call predecessors, (99), 4 states have return successors, (137), 95 states have call predecessors, (137), 99 states have call successors, (137) [2022-11-03 02:07:51,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 3864 transitions. [2022-11-03 02:07:51,497 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 3864 transitions. Word has length 507 [2022-11-03 02:07:51,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:51,498 INFO L495 AbstractCegarLoop]: Abstraction has 3186 states and 3864 transitions. [2022-11-03 02:07:51,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 28.88888888888889) internal successors, (1040), 36 states have internal predecessors, (1040), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:07:51,498 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 3864 transitions. [2022-11-03 02:07:51,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1126 [2022-11-03 02:07:51,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:51,516 INFO L195 NwaCegarLoop]: trace histogram [66, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:07:51,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:51,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:52,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:52,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:52,131 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:52,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:52,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1570853763, now seen corresponding path program 3 times [2022-11-03 02:07:52,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:52,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107835480] [2022-11-03 02:07:52,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:07:52,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:52,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:52,136 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:52,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31fa478-e888-466d-bf33-716c21449b83/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process