./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF --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 5dc0e184171498e703ccf08545f4f79d3c1c383c8c0fc13a1f35990befb669a4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:40:55,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:40:55,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:40:55,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:40:55,119 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:40:55,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:40:55,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:40:55,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:40:55,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:40:55,138 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:40:55,139 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:40:55,142 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:40:55,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:40:55,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:40:55,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:40:55,154 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:40:55,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:40:55,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:40:55,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:40:55,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:40:55,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:40:55,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:40:55,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:40:55,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:40:55,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:40:55,186 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:40:55,187 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:40:55,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:40:55,189 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:40:55,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:40:55,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:40:55,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:40:55,195 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:40:55,203 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:40:55,204 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:40:55,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:40:55,205 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:40:55,205 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:40:55,206 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:40:55,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:40:55,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:40:55,208 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:40:55,262 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:40:55,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:40:55,267 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:40:55,267 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:40:55,268 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:40:55,268 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:40:55,268 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:40:55,268 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:40:55,268 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:40:55,269 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:40:55,270 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:40:55,270 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:40:55,270 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:40:55,271 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:40:55,271 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:40:55,271 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:40:55,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:40:55,272 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:40:55,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:40:55,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:40:55,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:40:55,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:40:55,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:40:55,273 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:40:55,274 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:40:55,274 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:40:55,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:40:55,274 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:40:55,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:40:55,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:40:55,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:40:55,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:40:55,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:40:55,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:40:55,278 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:40:55,278 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:40:55,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:40:55,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:40:55,279 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:40:55,279 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:40:55,279 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5dc0e184171498e703ccf08545f4f79d3c1c383c8c0fc13a1f35990befb669a4 [2021-11-12 23:40:55,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:40:55,532 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:40:55,534 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:40:55,535 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:40:55,536 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:40:55,537 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i [2021-11-12 23:40:55,598 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/data/bb3774986/4fd4f08ad3644e68abec79b652ee910b/FLAG42d931fd0 [2021-11-12 23:40:56,147 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:40:56,152 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i [2021-11-12 23:40:56,179 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/data/bb3774986/4fd4f08ad3644e68abec79b652ee910b/FLAG42d931fd0 [2021-11-12 23:40:56,616 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/data/bb3774986/4fd4f08ad3644e68abec79b652ee910b [2021-11-12 23:40:56,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:40:56,621 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:40:56,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:40:56,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:40:56,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:40:56,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:40:56" (1/1) ... [2021-11-12 23:40:56,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42773c3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:56, skipping insertion in model container [2021-11-12 23:40:56,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:40:56" (1/1) ... [2021-11-12 23:40:56,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:40:56,668 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:40:56,797 WARN L228 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_d0a55208-3f31-44ce-bc15-c497e1bfaeab/sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i[296,309] [2021-11-12 23:40:56,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:40:56,926 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:40:56,938 WARN L228 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_d0a55208-3f31-44ce-bc15-c497e1bfaeab/sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i[296,309] [2021-11-12 23:40:56,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:40:57,001 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:40:57,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:57 WrapperNode [2021-11-12 23:40:57,001 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:40:57,003 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:40:57,003 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:40:57,003 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:40:57,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:57" (1/1) ... [2021-11-12 23:40:57,027 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:57" (1/1) ... [2021-11-12 23:40:57,056 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:40:57,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:40:57,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:40:57,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:40:57,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:57" (1/1) ... [2021-11-12 23:40:57,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:57" (1/1) ... [2021-11-12 23:40:57,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:57" (1/1) ... [2021-11-12 23:40:57,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:57" (1/1) ... [2021-11-12 23:40:57,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:57" (1/1) ... [2021-11-12 23:40:57,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:57" (1/1) ... [2021-11-12 23:40:57,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:57" (1/1) ... [2021-11-12 23:40:57,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:40:57,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:40:57,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:40:57,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:40:57,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:57" (1/1) ... [2021-11-12 23:40:57,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:40:57,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:40:57,115 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:40:57,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:40:57,157 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2021-11-12 23:40:57,176 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2021-11-12 23:40:57,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:40:57,177 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-11-12 23:40:57,177 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-11-12 23:40:57,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 23:40:57,177 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2021-11-12 23:40:57,178 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2021-11-12 23:40:57,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:40:57,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:40:57,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:40:57,570 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:40:57,570 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:40:57,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:40:57 BoogieIcfgContainer [2021-11-12 23:40:57,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:40:57,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:40:57,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:40:57,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:40:57,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:40:56" (1/3) ... [2021-11-12 23:40:57,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b99777d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:40:57, skipping insertion in model container [2021-11-12 23:40:57,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:57" (2/3) ... [2021-11-12 23:40:57,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b99777d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:40:57, skipping insertion in model container [2021-11-12 23:40:57,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:40:57" (3/3) ... [2021-11-12 23:40:57,596 INFO L111 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2021-11-12 23:40:57,601 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:40:57,602 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:40:57,667 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:40:57,674 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:40:57,674 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:40:57,692 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 17 states have internal predecessors, (17), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-12 23:40:57,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-12 23:40:57,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:57,697 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-12 23:40:57,698 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:57,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:57,704 INFO L85 PathProgramCache]: Analyzing trace with hash -967514280, now seen corresponding path program 1 times [2021-11-12 23:40:57,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:40:57,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057362054] [2021-11-12 23:40:57,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:57,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:40:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:57,958 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:40:57,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057362054] [2021-11-12 23:40:57,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057362054] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:57,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:57,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:40:57,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637271201] [2021-11-12 23:40:57,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:57,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:40:57,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:40:58,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:40:58,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:40:58,005 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 17 states have internal predecessors, (17), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:58,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:58,102 INFO L93 Difference]: Finished difference Result 48 states and 67 transitions. [2021-11-12 23:40:58,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:40:58,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-12 23:40:58,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:58,113 INFO L225 Difference]: With dead ends: 48 [2021-11-12 23:40:58,113 INFO L226 Difference]: Without dead ends: 22 [2021-11-12 23:40:58,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:40:58,127 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.38ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.81ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:58,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 55 Invalid, 22 Unknown, 0 Unchecked, 8.38ms Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 42.81ms Time] [2021-11-12 23:40:58,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-12 23:40:58,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-12 23:40:58,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-12 23:40:58,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-11-12 23:40:58,164 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 6 [2021-11-12 23:40:58,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:58,164 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-11-12 23:40:58,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:58,165 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-11-12 23:40:58,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-12 23:40:58,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:58,168 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:58,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:40:58,168 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:58,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:58,169 INFO L85 PathProgramCache]: Analyzing trace with hash -506895169, now seen corresponding path program 1 times [2021-11-12 23:40:58,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:40:58,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763768943] [2021-11-12 23:40:58,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:58,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:40:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:58,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:40:58,303 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:40:58,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763768943] [2021-11-12 23:40:58,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763768943] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:58,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:58,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:40:58,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705473635] [2021-11-12 23:40:58,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:58,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:40:58,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:40:58,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:40:58,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:40:58,307 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:40:58,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:58,438 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-11-12 23:40:58,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:40:58,438 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-12 23:40:58,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:58,440 INFO L225 Difference]: With dead ends: 28 [2021-11-12 23:40:58,440 INFO L226 Difference]: Without dead ends: 25 [2021-11-12 23:40:58,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:40:58,442 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.95ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 82.17ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:58,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 61 Invalid, 51 Unknown, 0 Unchecked, 1.95ms Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 82.17ms Time] [2021-11-12 23:40:58,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-12 23:40:58,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-11-12 23:40:58,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-12 23:40:58,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-12 23:40:58,483 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 19 [2021-11-12 23:40:58,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:58,484 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-12 23:40:58,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:40:58,485 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-12 23:40:58,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:40:58,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:58,486 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:58,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 23:40:58,487 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:58,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:58,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1885149539, now seen corresponding path program 1 times [2021-11-12 23:40:58,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:40:58,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162458203] [2021-11-12 23:40:58,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:58,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:40:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:58,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:58,943 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:40:58,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162458203] [2021-11-12 23:40:58,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162458203] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:40:58,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789190326] [2021-11-12 23:40:58,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:58,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:40:58,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:40:58,950 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:40:58,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:40:59,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:59,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-12 23:40:59,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:41:00,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:41:01,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789190326] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:01,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [898219437] [2021-11-12 23:41:01,953 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-12 23:41:01,954 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:41:01,958 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:41:01,964 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:41:01,964 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:41:01,998 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,000 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:41:02,000 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,001 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:41:02,002 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:41:02,004 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,005 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-11-12 23:41:02,008 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 196 [2021-11-12 23:41:02,026 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 36=[|v_#valid_11|]} [2021-11-12 23:41:02,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:02,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:02,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:02,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:02,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:02,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:02,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 16 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-12 23:41:02,054 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,055 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:41:02,056 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,056 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:41:02,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:41:02,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:02,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:02,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:02,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:02,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:02,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:02,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:02,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:02,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:02,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:02,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:02,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:02,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:02,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:02,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:02,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:02,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:02,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 38 [2021-11-12 23:41:02,111 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,113 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 23:41:02,114 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,114 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 23:41:02,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:41:02,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:02,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,129 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,132 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 155 [2021-11-12 23:41:02,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:41:02,133 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:193, output treesize:155 [2021-11-12 23:41:02,140 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,144 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 164 [2021-11-12 23:41:02,148 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,152 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:41:02,153 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,156 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:41:02,157 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:41:02,162 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,168 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 164 [2021-11-12 23:41:02,173 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,177 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 164 [2021-11-12 23:41:02,181 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,186 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 164 [2021-11-12 23:41:02,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:02,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:02,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:02,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:02,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:02,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:02,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:02,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:02,391 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,401 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 375 [2021-11-12 23:41:02,419 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,434 INFO L185 QuantifierPusher]: treesize reduction 51, result has 76.9 percent of original size 170 [2021-11-12 23:41:02,443 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,464 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 384 [2021-11-12 23:41:02,475 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,486 INFO L185 QuantifierPusher]: treesize reduction 51, result has 76.9 percent of original size 170 [2021-11-12 23:41:02,494 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,505 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 384 [2021-11-12 23:41:02,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:02,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:02,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:02,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:02,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:02,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:02,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:02,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:02,775 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,783 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 378 [2021-11-12 23:41:02,802 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,814 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 399 [2021-11-12 23:41:02,822 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,826 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:41:02,832 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,836 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:41:02,837 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,840 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:41:02,840 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:41:02,843 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:41:02,844 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,849 INFO L185 QuantifierPusher]: treesize reduction 15, result has 6.3 percent of original size 1 [2021-11-12 23:41:02,850 INFO L185 QuantifierPusher]: treesize reduction 16, result has 44.8 percent of original size 13 [2021-11-12 23:41:02,865 INFO L180 QuantifierPusher]: treesize reduction 16, result has 96.4 percent of original size [2021-11-12 23:41:02,877 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:41:02,881 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,897 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 311 [2021-11-12 23:41:02,911 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 372 [2021-11-12 23:41:02,922 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,932 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 399 [2021-11-12 23:41:02,946 INFO L180 QuantifierPusher]: treesize reduction 16, result has 96.4 percent of original size [2021-11-12 23:41:02,961 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:41:02,965 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:02,979 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 311 [2021-11-12 23:41:02,995 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 372 [2021-11-12 23:41:03,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:03,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:03,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:03,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:03,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:03,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:03,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:03,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:03,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:03,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:03,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:03,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:03,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:03,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:03,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:03,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:03,074 INFO L180 QuantifierPusher]: treesize reduction 36, result has 62.1 percent of original size [2021-11-12 23:41:03,076 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-11-12 23:41:03,082 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:03,103 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 399 [2021-11-12 23:41:03,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:03,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:03,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:03,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:03,138 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:03,151 INFO L185 QuantifierPusher]: treesize reduction 51, result has 76.9 percent of original size 170 [2021-11-12 23:41:03,154 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:03,157 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 164 [2021-11-12 23:41:03,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:03,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:03,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:03,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:03,244 INFO L197 IcfgInterpreter]: Interpreting procedure list_add with input of size 49 for LOIs [2021-11-12 23:41:03,251 INFO L180 QuantifierPusher]: treesize reduction 36, result has 67.3 percent of original size [2021-11-12 23:41:03,261 INFO L185 QuantifierPusher]: treesize reduction 6, result has 85.0 percent of original size 34 [2021-11-12 23:41:03,266 INFO L180 QuantifierPusher]: treesize reduction 36, result has 74.8 percent of original size [2021-11-12 23:41:03,271 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:41:03,272 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:03,275 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:41:03,277 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:41:03,278 INFO L197 IcfgInterpreter]: Interpreting procedure __blast_assert with input of size 26 for LOIs [2021-11-12 23:41:03,281 INFO L197 IcfgInterpreter]: Interpreting procedure my_malloc with input of size 114 for LOIs [2021-11-12 23:41:03,299 INFO L180 QuantifierPusher]: treesize reduction 57, result has 79.9 percent of original size [2021-11-12 23:41:03,303 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:41:03,304 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:03,307 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:41:03,312 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 205 [2021-11-12 23:41:03,313 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:41:08,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:41:08,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:41:08,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 16] total 44 [2021-11-12 23:41:08,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096654174] [2021-11-12 23:41:08,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:41:08,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-12 23:41:08,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:41:08,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-12 23:41:08,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=3269, Unknown=0, NotChecked=0, Total=3540 [2021-11-12 23:41:08,650 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 45 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 30 states have internal predecessors, (41), 13 states have call successors, (13), 11 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-12 23:41:09,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:09,950 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-11-12 23:41:09,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-12 23:41:09,950 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 30 states have internal predecessors, (41), 13 states have call successors, (13), 11 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 24 [2021-11-12 23:41:09,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:09,953 INFO L225 Difference]: With dead ends: 34 [2021-11-12 23:41:09,953 INFO L226 Difference]: Without dead ends: 31 [2021-11-12 23:41:09,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1558 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=509, Invalid=5497, Unknown=0, NotChecked=0, Total=6006 [2021-11-12 23:41:09,961 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 86 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 384.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.52ms SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 458.08ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:09,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 39 Invalid, 704 Unknown, 0 Unchecked, 7.52ms Time], IncrementalHoareTripleChecker [97 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 458.08ms Time] [2021-11-12 23:41:09,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-12 23:41:09,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2021-11-12 23:41:09,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-12 23:41:09,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-12 23:41:09,978 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 24 [2021-11-12 23:41:09,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:09,978 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-12 23:41:09,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 30 states have internal predecessors, (41), 13 states have call successors, (13), 11 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-12 23:41:09,979 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-12 23:41:09,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-12 23:41:09,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:09,981 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:10,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:10,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-12 23:41:10,206 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:10,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:10,207 INFO L85 PathProgramCache]: Analyzing trace with hash -138762106, now seen corresponding path program 1 times [2021-11-12 23:41:10,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:41:10,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948704843] [2021-11-12 23:41:10,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:10,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:41:10,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:10,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 23:41:10,287 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:41:10,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948704843] [2021-11-12 23:41:10,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948704843] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:10,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:41:10,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:41:10,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535875445] [2021-11-12 23:41:10,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:10,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:41:10,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:41:10,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:41:10,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:41:10,289 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 23:41:10,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:10,343 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-11-12 23:41:10,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:41:10,345 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-11-12 23:41:10,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:10,346 INFO L225 Difference]: With dead ends: 30 [2021-11-12 23:41:10,346 INFO L226 Difference]: Without dead ends: 27 [2021-11-12 23:41:10,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:41:10,348 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.20ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.40ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:10,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 81 Invalid, 49 Unknown, 0 Unchecked, 1.20ms Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 32.40ms Time] [2021-11-12 23:41:10,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-12 23:41:10,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-11-12 23:41:10,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-12 23:41:10,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-12 23:41:10,354 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 30 [2021-11-12 23:41:10,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:10,355 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-12 23:41:10,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 23:41:10,355 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-12 23:41:10,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-12 23:41:10,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:10,357 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:10,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-11-12 23:41:10,357 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:10,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:10,358 INFO L85 PathProgramCache]: Analyzing trace with hash 933472182, now seen corresponding path program 1 times [2021-11-12 23:41:10,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:41:10,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947311905] [2021-11-12 23:41:10,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:10,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:41:10,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:41:10,380 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-12 23:41:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:41:10,473 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-12 23:41:10,473 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-12 23:41:10,474 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 23:41:10,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-11-12 23:41:10,479 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2021-11-12 23:41:10,483 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 23:41:10,523 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getProgramExecutionAsString(CounterExampleResult.java:155) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getLongDescription(CounterExampleResult.java:134) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-12 23:41:10,526 INFO L158 Benchmark]: Toolchain (without parser) took 13905.72ms. Allocated memory was 100.7MB in the beginning and 186.6MB in the end (delta: 86.0MB). Free memory was 71.5MB in the beginning and 131.8MB in the end (delta: -60.4MB). Peak memory consumption was 27.1MB. Max. memory is 16.1GB. [2021-11-12 23:41:10,527 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 100.7MB. Free memory is still 70.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:41:10,527 INFO L158 Benchmark]: CACSL2BoogieTranslator took 379.51ms. Allocated memory is still 100.7MB. Free memory was 71.3MB in the beginning and 55.3MB in the end (delta: 15.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 23:41:10,527 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.18ms. Allocated memory is still 100.7MB. Free memory was 55.2MB in the beginning and 53.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:41:10,528 INFO L158 Benchmark]: Boogie Preprocessor took 22.92ms. Allocated memory is still 100.7MB. Free memory was 53.3MB in the beginning and 52.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:41:10,528 INFO L158 Benchmark]: RCFGBuilder took 491.61ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 52.0MB in the beginning and 89.8MB in the end (delta: -37.8MB). Peak memory consumption was 11.4MB. Max. memory is 16.1GB. [2021-11-12 23:41:10,529 INFO L158 Benchmark]: TraceAbstraction took 12950.92ms. Allocated memory was 121.6MB in the beginning and 186.6MB in the end (delta: 65.0MB). Free memory was 89.3MB in the beginning and 131.8MB in the end (delta: -42.6MB). Peak memory consumption was 21.9MB. Max. memory is 16.1GB. [2021-11-12 23:41:10,531 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 100.7MB. Free memory is still 70.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 379.51ms. Allocated memory is still 100.7MB. Free memory was 71.3MB in the beginning and 55.3MB in the end (delta: 15.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.18ms. Allocated memory is still 100.7MB. Free memory was 55.2MB in the beginning and 53.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.92ms. Allocated memory is still 100.7MB. Free memory was 53.3MB in the beginning and 52.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 491.61ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 52.0MB in the beginning and 89.8MB in the end (delta: -37.8MB). Peak memory consumption was 11.4MB. Max. memory is 16.1GB. * TraceAbstraction took 12950.92ms. Allocated memory was 121.6MB in the beginning and 186.6MB in the end (delta: 65.0MB). Free memory was 89.3MB in the beginning and 131.8MB in the end (delta: -42.6MB). Peak memory consumption was 21.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-12 23:41:10,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/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/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF --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 5dc0e184171498e703ccf08545f4f79d3c1c383c8c0fc13a1f35990befb669a4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:41:12,976 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:41:12,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:41:13,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:41:13,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:41:13,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:41:13,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:41:13,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:41:13,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:41:13,036 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:41:13,037 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:41:13,038 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:41:13,039 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:41:13,040 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:41:13,042 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:41:13,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:41:13,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:41:13,059 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:41:13,061 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:41:13,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:41:13,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:41:13,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:41:13,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:41:13,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:41:13,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:41:13,090 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:41:13,090 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:41:13,091 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:41:13,092 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:41:13,093 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:41:13,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:41:13,094 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:41:13,095 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:41:13,096 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:41:13,097 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:41:13,098 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:41:13,099 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:41:13,099 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:41:13,100 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:41:13,101 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:41:13,102 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:41:13,103 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:41:13,131 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:41:13,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:41:13,133 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:41:13,133 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:41:13,134 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:41:13,134 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:41:13,134 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:41:13,135 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:41:13,135 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:41:13,135 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:41:13,136 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:41:13,137 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:41:13,137 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:41:13,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:41:13,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:41:13,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:41:13,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:41:13,141 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:41:13,141 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:41:13,141 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:41:13,142 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:41:13,142 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:41:13,142 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:41:13,143 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:41:13,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:41:13,143 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:41:13,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:41:13,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:41:13,144 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:41:13,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:41:13,145 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:41:13,145 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:41:13,145 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:41:13,146 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:41:13,146 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:41:13,146 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:41:13,147 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_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5dc0e184171498e703ccf08545f4f79d3c1c383c8c0fc13a1f35990befb669a4 [2021-11-12 23:41:13,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:41:13,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:41:13,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:41:13,547 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:41:13,548 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:41:13,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i [2021-11-12 23:41:13,631 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/data/23da3dd49/5a815c175e1342a7b0897512fd2e0055/FLAG04d076181 [2021-11-12 23:41:14,223 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:41:14,227 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i [2021-11-12 23:41:14,247 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/data/23da3dd49/5a815c175e1342a7b0897512fd2e0055/FLAG04d076181 [2021-11-12 23:41:14,496 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/data/23da3dd49/5a815c175e1342a7b0897512fd2e0055 [2021-11-12 23:41:14,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:41:14,502 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:41:14,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:41:14,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:41:14,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:41:14,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:41:14" (1/1) ... [2021-11-12 23:41:14,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69cb6536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:14, skipping insertion in model container [2021-11-12 23:41:14,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:41:14" (1/1) ... [2021-11-12 23:41:14,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:41:14,573 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:41:14,770 WARN L228 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_d0a55208-3f31-44ce-bc15-c497e1bfaeab/sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i[296,309] [2021-11-12 23:41:14,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:41:14,990 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:41:15,004 WARN L228 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_d0a55208-3f31-44ce-bc15-c497e1bfaeab/sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i[296,309] [2021-11-12 23:41:15,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:41:15,087 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:41:15,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:15 WrapperNode [2021-11-12 23:41:15,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:41:15,089 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:41:15,089 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:41:15,090 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:41:15,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:15" (1/1) ... [2021-11-12 23:41:15,113 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:15" (1/1) ... [2021-11-12 23:41:15,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:41:15,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:41:15,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:41:15,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:41:15,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:15" (1/1) ... [2021-11-12 23:41:15,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:15" (1/1) ... [2021-11-12 23:41:15,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:15" (1/1) ... [2021-11-12 23:41:15,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:15" (1/1) ... [2021-11-12 23:41:15,183 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:15" (1/1) ... [2021-11-12 23:41:15,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:15" (1/1) ... [2021-11-12 23:41:15,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:15" (1/1) ... [2021-11-12 23:41:15,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:41:15,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:41:15,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:41:15,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:41:15,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:15" (1/1) ... [2021-11-12 23:41:15,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:41:15,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:41:15,245 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:41:15,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:41:15,291 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2021-11-12 23:41:15,291 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2021-11-12 23:41:15,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:41:15,292 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-11-12 23:41:15,292 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-11-12 23:41:15,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 23:41:15,292 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2021-11-12 23:41:15,292 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2021-11-12 23:41:15,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:41:15,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:41:15,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:41:15,591 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:41:15,591 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:41:15,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:41:15 BoogieIcfgContainer [2021-11-12 23:41:15,593 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:41:15,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:41:15,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:41:15,598 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:41:15,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:41:14" (1/3) ... [2021-11-12 23:41:15,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234aa668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:41:15, skipping insertion in model container [2021-11-12 23:41:15,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:15" (2/3) ... [2021-11-12 23:41:15,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234aa668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:41:15, skipping insertion in model container [2021-11-12 23:41:15,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:41:15" (3/3) ... [2021-11-12 23:41:15,601 INFO L111 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2021-11-12 23:41:15,606 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:41:15,606 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:41:15,672 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:41:15,679 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:41:15,679 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:41:15,695 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 27 states have internal predecessors, (30), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-12 23:41:15,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-12 23:41:15,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:15,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:15,700 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:15,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:15,714 INFO L85 PathProgramCache]: Analyzing trace with hash -432214362, now seen corresponding path program 1 times [2021-11-12 23:41:15,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:15,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [984403245] [2021-11-12 23:41:15,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:15,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:15,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:15,736 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:15,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:41:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:15,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:41:15,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:15,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:41:15,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:41:16,025 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:16,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [984403245] [2021-11-12 23:41:16,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [984403245] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:16,026 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:41:16,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:41:16,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492410770] [2021-11-12 23:41:16,031 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:16,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:41:16,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:16,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:41:16,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:41:16,079 INFO L87 Difference]: Start difference. First operand has 36 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 27 states have internal predecessors, (30), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:41:16,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:16,162 INFO L93 Difference]: Finished difference Result 66 states and 91 transitions. [2021-11-12 23:41:16,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:41:16,167 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-12 23:41:16,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:16,179 INFO L225 Difference]: With dead ends: 66 [2021-11-12 23:41:16,179 INFO L226 Difference]: Without dead ends: 29 [2021-11-12 23:41:16,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:41:16,188 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 26 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.29ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.79ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:16,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 96 Invalid, 10 Unknown, 0 Unchecked, 8.29ms Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 23.79ms Time] [2021-11-12 23:41:16,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-12 23:41:16,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-12 23:41:16,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-12 23:41:16,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-11-12 23:41:16,240 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 7 [2021-11-12 23:41:16,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:16,240 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-11-12 23:41:16,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:41:16,241 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-11-12 23:41:16,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-12 23:41:16,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:16,244 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:16,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:16,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:16,467 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:16,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:16,471 INFO L85 PathProgramCache]: Analyzing trace with hash 263813924, now seen corresponding path program 1 times [2021-11-12 23:41:16,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:16,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [210300399] [2021-11-12 23:41:16,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:16,476 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:16,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:16,477 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:16,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:41:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:16,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:41:16,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:41:16,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:16,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:41:16,978 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:16,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [210300399] [2021-11-12 23:41:16,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [210300399] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:16,981 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:41:16,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-12 23:41:16,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29241686] [2021-11-12 23:41:16,985 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:16,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:41:16,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:16,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:41:16,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:41:16,991 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:41:17,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:17,054 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2021-11-12 23:41:17,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:41:17,057 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-11-12 23:41:17,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:17,061 INFO L225 Difference]: With dead ends: 49 [2021-11-12 23:41:17,061 INFO L226 Difference]: Without dead ends: 32 [2021-11-12 23:41:17,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:41:17,065 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.04ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.65ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:17,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 158 Invalid, 16 Unknown, 0 Unchecked, 5.04ms Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 21.65ms Time] [2021-11-12 23:41:17,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-12 23:41:17,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-12 23:41:17,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-12 23:41:17,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-11-12 23:41:17,086 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 26 [2021-11-12 23:41:17,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:17,086 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-11-12 23:41:17,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:41:17,087 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-11-12 23:41:17,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-12 23:41:17,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:17,089 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:17,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:17,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:17,301 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:17,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:17,302 INFO L85 PathProgramCache]: Analyzing trace with hash 964878502, now seen corresponding path program 1 times [2021-11-12 23:41:17,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:17,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1727332335] [2021-11-12 23:41:17,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:17,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:17,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:17,304 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:17,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:41:17,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:17,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:41:17,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:41:17,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:41:17,706 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:17,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1727332335] [2021-11-12 23:41:17,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1727332335] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:17,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [91032570] [2021-11-12 23:41:17,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:17,707 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:41:17,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:41:17,711 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:41:17,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-12 23:41:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:17,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:41:17,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:41:18,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:41:19,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [91032570] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:41:19,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:41:19,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6, 6, 13] total 28 [2021-11-12 23:41:19,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379769821] [2021-11-12 23:41:19,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:19,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:41:19,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:19,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:41:19,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-11-12 23:41:19,113 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 23:41:19,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:19,683 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2021-11-12 23:41:19,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:41:19,685 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-11-12 23:41:19,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:19,687 INFO L225 Difference]: With dead ends: 64 [2021-11-12 23:41:19,688 INFO L226 Difference]: Without dead ends: 58 [2021-11-12 23:41:19,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2021-11-12 23:41:19,689 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 36 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 303.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.64ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 353.77ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:19,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 188 Invalid, 346 Unknown, 0 Unchecked, 4.64ms Time], IncrementalHoareTripleChecker [11 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 353.77ms Time] [2021-11-12 23:41:19,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-12 23:41:19,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2021-11-12 23:41:19,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 37 states have internal predecessors, (44), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-12 23:41:19,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2021-11-12 23:41:19,703 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 26 [2021-11-12 23:41:19,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:19,703 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2021-11-12 23:41:19,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 23:41:19,704 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2021-11-12 23:41:19,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-12 23:41:19,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:19,705 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:19,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:19,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:20,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:41:20,119 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:20,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:20,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1592458610, now seen corresponding path program 1 times [2021-11-12 23:41:20,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:20,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086686589] [2021-11-12 23:41:20,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:20,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:20,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:20,122 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:20,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:41:20,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:20,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:41:20,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:41:20,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:41:20,484 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:20,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086686589] [2021-11-12 23:41:20,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086686589] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:20,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1711530150] [2021-11-12 23:41:20,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:20,485 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:41:20,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:41:20,486 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:41:20,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-12 23:41:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:20,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-12 23:41:20,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:41:21,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:22,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:41:22,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1711530150] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:22,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813294328] [2021-11-12 23:41:22,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:22,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:41:22,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:41:22,384 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:41:22,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-12 23:41:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:22,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:41:22,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:41:22,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:22,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:41:22,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813294328] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:22,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:41:22,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 18, 20, 6, 6] total 38 [2021-11-12 23:41:22,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797819961] [2021-11-12 23:41:22,678 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:41:22,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-12 23:41:22,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:22,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-12 23:41:22,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1292, Unknown=0, NotChecked=0, Total=1406 [2021-11-12 23:41:22,684 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 38 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 29 states have internal predecessors, (63), 11 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-12 23:41:25,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:25,359 INFO L93 Difference]: Finished difference Result 109 states and 137 transitions. [2021-11-12 23:41:25,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-12 23:41:25,361 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 29 states have internal predecessors, (63), 11 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 32 [2021-11-12 23:41:25,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:25,362 INFO L225 Difference]: With dead ends: 109 [2021-11-12 23:41:25,362 INFO L226 Difference]: Without dead ends: 63 [2021-11-12 23:41:25,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=323, Invalid=3459, Unknown=0, NotChecked=0, Total=3782 [2021-11-12 23:41:25,366 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 96 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1259.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.81ms SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1505.87ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:25,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 296 Invalid, 1255 Unknown, 0 Unchecked, 10.81ms Time], IncrementalHoareTripleChecker [68 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 1505.87ms Time] [2021-11-12 23:41:25,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-12 23:41:25,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2021-11-12 23:41:25,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 43 states have internal predecessors, (49), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-12 23:41:25,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2021-11-12 23:41:25,379 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 32 [2021-11-12 23:41:25,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:25,379 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2021-11-12 23:41:25,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 29 states have internal predecessors, (63), 11 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-12 23:41:25,380 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2021-11-12 23:41:25,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-12 23:41:25,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:25,381 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:25,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:25,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:25,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:25,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:41:25,999 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:25,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:25,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1955201674, now seen corresponding path program 1 times [2021-11-12 23:41:26,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:26,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929492353] [2021-11-12 23:41:26,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:26,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:26,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:26,001 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:26,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:41:26,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:26,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 23:41:26,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:41:26,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:26,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:41:26,866 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:26,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929492353] [2021-11-12 23:41:26,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929492353] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:26,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [341595089] [2021-11-12 23:41:26,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:26,867 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:41:26,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:41:26,874 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:41:26,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-12 23:41:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:26,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 23:41:26,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:41:27,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:41:27,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [341595089] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:27,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412625141] [2021-11-12 23:41:27,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:27,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:41:27,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:41:27,362 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:41:27,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-12 23:41:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:27,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 23:41:27,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:27,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:41:27,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:41:27,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412625141] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:27,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:41:27,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 22 [2021-11-12 23:41:27,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884665332] [2021-11-12 23:41:27,820 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:41:27,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-12 23:41:27,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:27,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-12 23:41:27,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:41:27,821 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 5 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-12 23:41:28,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:28,810 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2021-11-12 23:41:28,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-12 23:41:28,810 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 5 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2021-11-12 23:41:28,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:28,812 INFO L225 Difference]: With dead ends: 73 [2021-11-12 23:41:28,812 INFO L226 Difference]: Without dead ends: 63 [2021-11-12 23:41:28,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2021-11-12 23:41:28,814 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 79 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 474.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.56ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 548.58ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:28,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 109 Invalid, 567 Unknown, 0 Unchecked, 5.56ms Time], IncrementalHoareTripleChecker [48 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 548.58ms Time] [2021-11-12 23:41:28,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-12 23:41:28,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2021-11-12 23:41:28,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-12 23:41:28,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2021-11-12 23:41:28,825 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 32 [2021-11-12 23:41:28,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:28,826 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2021-11-12 23:41:28,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 5 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-12 23:41:28,826 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2021-11-12 23:41:28,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-12 23:41:28,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:28,828 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:28,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:29,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:29,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:29,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:41:29,442 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:29,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:29,442 INFO L85 PathProgramCache]: Analyzing trace with hash 755997495, now seen corresponding path program 1 times [2021-11-12 23:41:29,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:29,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1408913418] [2021-11-12 23:41:29,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:29,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:29,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:29,445 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:29,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:41:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:29,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 23:41:29,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 23:41:29,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:41:30,526 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:30,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1408913418] [2021-11-12 23:41:30,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1408913418] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:41:30,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:41:30,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [16] total 25 [2021-11-12 23:41:30,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245107208] [2021-11-12 23:41:30,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:30,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-12 23:41:30,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:30,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-12 23:41:30,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:41:30,529 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-12 23:41:31,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:31,003 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2021-11-12 23:41:31,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:41:31,004 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2021-11-12 23:41:31,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:31,005 INFO L225 Difference]: With dead ends: 69 [2021-11-12 23:41:31,005 INFO L226 Difference]: Without dead ends: 56 [2021-11-12 23:41:31,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-11-12 23:41:31,009 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 30 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 251.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.02ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 300.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:31,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 139 Invalid, 295 Unknown, 0 Unchecked, 3.02ms Time], IncrementalHoareTripleChecker [7 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 300.22ms Time] [2021-11-12 23:41:31,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-12 23:41:31,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-11-12 23:41:31,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-12 23:41:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2021-11-12 23:41:31,019 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 41 [2021-11-12 23:41:31,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:31,020 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2021-11-12 23:41:31,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-12 23:41:31,020 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2021-11-12 23:41:31,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-12 23:41:31,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:31,022 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:31,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:31,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:31,235 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:31,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:31,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1763962439, now seen corresponding path program 1 times [2021-11-12 23:41:31,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:31,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358544381] [2021-11-12 23:41:31,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:31,236 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:31,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:31,236 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:31,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:41:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:31,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:41:31,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:31,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 23:41:31,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:32,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:41:32,317 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:32,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358544381] [2021-11-12 23:41:32,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358544381] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:32,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [776646059] [2021-11-12 23:41:32,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:32,318 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:41:32,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:41:32,322 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:41:32,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 23:41:32,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:32,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-12 23:41:32,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:32,679 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:41:32,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:41:32,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [776646059] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:32,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128321356] [2021-11-12 23:41:32,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:32,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:41:32,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:41:32,963 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:41:32,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-12 23:41:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:33,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 23:41:33,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:41:33,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:33,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:41:33,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128321356] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:33,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:41:33,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17, 17, 17, 17] total 37 [2021-11-12 23:41:33,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092379135] [2021-11-12 23:41:33,660 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:41:33,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-12 23:41:33,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:33,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-12 23:41:33,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-11-12 23:41:33,661 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 37 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 27 states have internal predecessors, (55), 13 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (14), 13 states have call predecessors, (14), 9 states have call successors, (14) [2021-11-12 23:41:34,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:34,847 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2021-11-12 23:41:34,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-12 23:41:34,847 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 27 states have internal predecessors, (55), 13 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (14), 13 states have call predecessors, (14), 9 states have call successors, (14) Word has length 41 [2021-11-12 23:41:34,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:34,848 INFO L225 Difference]: With dead ends: 78 [2021-11-12 23:41:34,849 INFO L226 Difference]: Without dead ends: 72 [2021-11-12 23:41:34,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 209 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=207, Invalid=2343, Unknown=0, NotChecked=0, Total=2550 [2021-11-12 23:41:34,850 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 54 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 674.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.65ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 836.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:34,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 210 Invalid, 1004 Unknown, 0 Unchecked, 5.65ms Time], IncrementalHoareTripleChecker [30 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 836.14ms Time] [2021-11-12 23:41:34,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-12 23:41:34,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-11-12 23:41:34,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 52 states have internal predecessors, (58), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-11-12 23:41:34,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2021-11-12 23:41:34,862 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 41 [2021-11-12 23:41:34,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:34,863 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2021-11-12 23:41:34,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 27 states have internal predecessors, (55), 13 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (14), 13 states have call predecessors, (14), 9 states have call successors, (14) [2021-11-12 23:41:34,863 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2021-11-12 23:41:34,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-12 23:41:34,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:34,865 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:34,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:35,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:35,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-11-12 23:41:35,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:41:35,470 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:35,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:35,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1062897861, now seen corresponding path program 1 times [2021-11-12 23:41:35,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:35,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911089994] [2021-11-12 23:41:35,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:35,471 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:35,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:35,472 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:35,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:41:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:35,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-12 23:41:35,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:41:36,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:41:36,472 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:36,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911089994] [2021-11-12 23:41:36,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911089994] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:36,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2082892866] [2021-11-12 23:41:36,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:36,472 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:41:36,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:41:36,474 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:41:36,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 23:41:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:36,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 23:41:36,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:36,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:41:36,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:41:36,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2082892866] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:36,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373520741] [2021-11-12 23:41:36,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:36,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:41:36,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:41:36,898 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:41:36,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-12 23:41:36,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:36,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 23:41:36,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:41:37,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:41:37,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373520741] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:37,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:41:37,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7, 7, 7, 7] total 17 [2021-11-12 23:41:37,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830271488] [2021-11-12 23:41:37,288 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:41:37,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-12 23:41:37,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:37,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-12 23:41:37,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:41:37,290 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-12 23:41:38,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:38,183 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2021-11-12 23:41:38,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-12 23:41:38,183 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 41 [2021-11-12 23:41:38,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:38,184 INFO L225 Difference]: With dead ends: 82 [2021-11-12 23:41:38,185 INFO L226 Difference]: Without dead ends: 66 [2021-11-12 23:41:38,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-11-12 23:41:38,186 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 40 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 364.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.11ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 418.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:38,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 110 Invalid, 407 Unknown, 0 Unchecked, 4.11ms Time], IncrementalHoareTripleChecker [22 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 418.84ms Time] [2021-11-12 23:41:38,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-12 23:41:38,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2021-11-12 23:41:38,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 40 states have internal predecessors, (44), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-12 23:41:38,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-11-12 23:41:38,196 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 41 [2021-11-12 23:41:38,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:38,197 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-11-12 23:41:38,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-12 23:41:38,197 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-11-12 23:41:38,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-12 23:41:38,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:38,198 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:38,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:38,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:38,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:38,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:41:38,801 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:38,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:38,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1393953889, now seen corresponding path program 1 times [2021-11-12 23:41:38,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:38,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577594190] [2021-11-12 23:41:38,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:38,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:38,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:38,803 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:38,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:41:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:41:38,902 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-12 23:41:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:41:39,078 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-12 23:41:39,079 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-12 23:41:39,080 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 23:41:39,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:39,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:39,298 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:39,301 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 23:41:39,360 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getProgramExecutionAsString(CounterExampleResult.java:155) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getLongDescription(CounterExampleResult.java:134) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-12 23:41:39,374 INFO L158 Benchmark]: Toolchain (without parser) took 24872.68ms. Allocated memory was 71.3MB in the beginning and 94.4MB in the end (delta: 23.1MB). Free memory was 51.4MB in the beginning and 62.7MB in the end (delta: -11.3MB). Peak memory consumption was 10.4MB. Max. memory is 16.1GB. [2021-11-12 23:41:39,375 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 71.3MB. Free memory is still 51.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:41:39,375 INFO L158 Benchmark]: CACSL2BoogieTranslator took 585.32ms. Allocated memory is still 71.3MB. Free memory was 51.2MB in the beginning and 47.1MB in the end (delta: 4.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 23:41:39,375 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.59ms. Allocated memory is still 71.3MB. Free memory was 47.1MB in the beginning and 45.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:41:39,376 INFO L158 Benchmark]: Boogie Preprocessor took 59.70ms. Allocated memory is still 71.3MB. Free memory was 45.0MB in the beginning and 43.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:41:39,376 INFO L158 Benchmark]: RCFGBuilder took 385.62ms. Allocated memory is still 71.3MB. Free memory was 43.5MB in the beginning and 31.5MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:41:39,377 INFO L158 Benchmark]: TraceAbstraction took 23779.25ms. Allocated memory was 71.3MB in the beginning and 94.4MB in the end (delta: 23.1MB). Free memory was 30.9MB in the beginning and 62.7MB in the end (delta: -31.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:41:39,378 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 71.3MB. Free memory is still 51.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 585.32ms. Allocated memory is still 71.3MB. Free memory was 51.2MB in the beginning and 47.1MB in the end (delta: 4.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.59ms. Allocated memory is still 71.3MB. Free memory was 47.1MB in the beginning and 45.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.70ms. Allocated memory is still 71.3MB. Free memory was 45.0MB in the beginning and 43.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 385.62ms. Allocated memory is still 71.3MB. Free memory was 43.5MB in the beginning and 31.5MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 23779.25ms. Allocated memory was 71.3MB in the beginning and 94.4MB in the end (delta: 23.1MB). Free memory was 30.9MB in the beginning and 62.7MB in the end (delta: -31.7MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-12 23:41:39,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a55208-3f31-44ce-bc15-c497e1bfaeab/bin/utaipan-vmNK8stdcF/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 Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: NullPointerException: null