./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8 --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 30672bd579b7f25ffa685cb80d8a419cb542781c19afe0226ba5d9d3cf26984c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:56:31,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:56:31,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:56:32,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:56:32,001 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:56:32,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:56:32,013 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:56:32,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:56:32,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:56:32,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:56:32,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:56:32,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:56:32,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:56:32,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:56:32,048 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:56:32,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:56:32,053 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:56:32,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:56:32,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:56:32,072 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:56:32,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:56:32,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:56:32,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:56:32,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:56:32,098 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:56:32,099 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:56:32,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:56:32,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:56:32,103 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:56:32,105 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:56:32,106 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:56:32,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:56:32,110 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:56:32,111 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:56:32,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:56:32,114 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:56:32,115 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:56:32,115 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:56:32,115 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:56:32,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:56:32,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:56:32,119 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 00:56:32,172 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:56:32,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:56:32,174 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:56:32,175 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:56:32,175 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:56:32,176 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:56:32,176 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:56:32,176 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:56:32,184 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:56:32,185 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:56:32,186 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:56:32,187 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:56:32,187 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:56:32,187 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:56:32,188 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:56:32,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:56:32,189 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:56:32,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:56:32,190 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:56:32,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:56:32,190 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:56:32,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:56:32,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:56:32,191 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:56:32,191 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:56:32,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:56:32,192 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:56:32,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:56:32,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:56:32,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:56:32,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:56:32,195 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:56:32,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:56:32,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:56:32,197 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:56:32,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:56:32,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:56:32,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:56:32,198 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:56:32,198 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_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30672bd579b7f25ffa685cb80d8a419cb542781c19afe0226ba5d9d3cf26984c [2021-11-07 00:56:32,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:56:32,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:56:32,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:56:32,683 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:56:32,685 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:56:32,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2021-11-07 00:56:32,790 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/data/20afc52ae/a391ab7cced645479e0ee7b82d64bbda/FLAG0dae18467 [2021-11-07 00:56:33,342 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:56:33,343 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2021-11-07 00:56:33,361 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/data/20afc52ae/a391ab7cced645479e0ee7b82d64bbda/FLAG0dae18467 [2021-11-07 00:56:33,670 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/data/20afc52ae/a391ab7cced645479e0ee7b82d64bbda [2021-11-07 00:56:33,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:56:33,677 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:56:33,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:56:33,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:56:33,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:56:33,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:56:33" (1/1) ... [2021-11-07 00:56:33,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@175f80d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:33, skipping insertion in model container [2021-11-07 00:56:33,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:56:33" (1/1) ... [2021-11-07 00:56:33,704 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:56:33,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:56:33,904 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_75e1d39b-0581-4417-b40e-ef65cf71eddf/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2021-11-07 00:56:33,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:56:33,941 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:56:33,957 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_75e1d39b-0581-4417-b40e-ef65cf71eddf/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2021-11-07 00:56:33,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:56:33,988 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:56:33,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:33 WrapperNode [2021-11-07 00:56:33,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:56:33,990 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:56:33,990 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:56:33,991 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:56:34,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:33" (1/1) ... [2021-11-07 00:56:34,009 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:33" (1/1) ... [2021-11-07 00:56:34,051 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:56:34,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:56:34,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:56:34,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:56:34,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:33" (1/1) ... [2021-11-07 00:56:34,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:33" (1/1) ... [2021-11-07 00:56:34,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:33" (1/1) ... [2021-11-07 00:56:34,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:33" (1/1) ... [2021-11-07 00:56:34,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:33" (1/1) ... [2021-11-07 00:56:34,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:33" (1/1) ... [2021-11-07 00:56:34,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:33" (1/1) ... [2021-11-07 00:56:34,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:56:34,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:56:34,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:56:34,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:56:34,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:33" (1/1) ... [2021-11-07 00:56:34,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:56:34,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:56:34,156 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:56:34,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:56:34,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 00:56:34,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:56:34,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:56:34,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:56:35,020 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:56:35,021 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2021-11-07 00:56:35,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:56:35 BoogieIcfgContainer [2021-11-07 00:56:35,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:56:35,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:56:35,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:56:35,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:56:35,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:56:33" (1/3) ... [2021-11-07 00:56:35,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c67e30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:56:35, skipping insertion in model container [2021-11-07 00:56:35,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:33" (2/3) ... [2021-11-07 00:56:35,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c67e30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:56:35, skipping insertion in model container [2021-11-07 00:56:35,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:56:35" (3/3) ... [2021-11-07 00:56:35,035 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound100.c [2021-11-07 00:56:35,042 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:56:35,042 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 00:56:35,103 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:56:35,112 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 [2021-11-07 00:56:35,113 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 00:56:35,132 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:35,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-07 00:56:35,138 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:35,139 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-07 00:56:35,140 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:56:35,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:35,147 INFO L85 PathProgramCache]: Analyzing trace with hash 169560536, now seen corresponding path program 1 times [2021-11-07 00:56:35,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:35,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676615405] [2021-11-07 00:56:35,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:35,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:35,248 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 00:56:35,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748836154] [2021-11-07 00:56:35,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:35,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:56:35,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:56:35,266 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:56:35,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 00:56:35,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:35,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 00:56:35,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:35,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:35,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:35,418 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:35,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676615405] [2021-11-07 00:56:35,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 00:56:35,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748836154] [2021-11-07 00:56:35,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748836154] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:35,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:35,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 00:56:35,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730129234] [2021-11-07 00:56:35,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 00:56:35,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:35,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 00:56:35,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 00:56:35,450 INFO L87 Difference]: Start difference. First operand has 33 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:35,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:35,472 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2021-11-07 00:56:35,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 00:56:35,473 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-07 00:56:35,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:35,483 INFO L225 Difference]: With dead ends: 65 [2021-11-07 00:56:35,483 INFO L226 Difference]: Without dead ends: 31 [2021-11-07 00:56:35,489 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 00:56:35,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-07 00:56:35,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-07 00:56:35,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.36) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:35,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-11-07 00:56:35,539 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 5 [2021-11-07 00:56:35,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:35,540 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-11-07 00:56:35,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:35,541 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-11-07 00:56:35,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 00:56:35,543 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:35,543 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 00:56:35,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:35,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:56:35,759 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:56:35,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:35,760 INFO L85 PathProgramCache]: Analyzing trace with hash 890891193, now seen corresponding path program 1 times [2021-11-07 00:56:35,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:35,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404870952] [2021-11-07 00:56:35,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:35,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:35,773 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 00:56:35,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136586837] [2021-11-07 00:56:35,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:35,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:56:35,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:56:35,788 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:56:35,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 00:56:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:35,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:56:35,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:35,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:35,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:36,041 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:36,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404870952] [2021-11-07 00:56:36,042 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 00:56:36,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136586837] [2021-11-07 00:56:36,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136586837] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:36,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:36,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 00:56:36,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094454081] [2021-11-07 00:56:36,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:56:36,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:36,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:56:36,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:56:36,056 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:36,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:36,118 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2021-11-07 00:56:36,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:56:36,122 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-07 00:56:36,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:36,123 INFO L225 Difference]: With dead ends: 51 [2021-11-07 00:56:36,124 INFO L226 Difference]: Without dead ends: 43 [2021-11-07 00:56:36,124 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:56:36,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-07 00:56:36,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2021-11-07 00:56:36,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:36,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-11-07 00:56:36,131 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 6 [2021-11-07 00:56:36,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:36,132 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-11-07 00:56:36,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:36,132 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-11-07 00:56:36,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 00:56:36,133 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:36,133 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:36,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:36,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:56:36,353 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:56:36,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:36,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1847641631, now seen corresponding path program 1 times [2021-11-07 00:56:36,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:36,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025455167] [2021-11-07 00:56:36,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:36,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:36,362 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 00:56:36,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554562428] [2021-11-07 00:56:36,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:36,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:56:36,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:56:36,372 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:56:36,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 00:56:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:36,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:56:36,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:36,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:36,590 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:36,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025455167] [2021-11-07 00:56:36,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 00:56:36,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554562428] [2021-11-07 00:56:36,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554562428] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:36,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:36,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 00:56:36,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167662953] [2021-11-07 00:56:36,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:56:36,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:36,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:56:36,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:36,594 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:36,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:36,633 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-11-07 00:56:36,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:56:36,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-07 00:56:36,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:36,636 INFO L225 Difference]: With dead ends: 61 [2021-11-07 00:56:36,636 INFO L226 Difference]: Without dead ends: 53 [2021-11-07 00:56:36,637 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:36,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-07 00:56:36,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2021-11-07 00:56:36,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:36,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-11-07 00:56:36,645 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 7 [2021-11-07 00:56:36,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:36,645 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-11-07 00:56:36,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:36,646 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-11-07 00:56:36,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 00:56:36,647 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:36,647 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:36,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:36,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-07 00:56:36,867 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:56:36,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:36,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1442287066, now seen corresponding path program 1 times [2021-11-07 00:56:36,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:36,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957686463] [2021-11-07 00:56:36,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:36,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:36,876 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 00:56:36,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96073195] [2021-11-07 00:56:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:36,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:56:36,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:56:36,879 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:56:36,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 00:56:36,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:36,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 00:56:36,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:37,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:37,121 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:37,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957686463] [2021-11-07 00:56:37,122 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 00:56:37,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96073195] [2021-11-07 00:56:37,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96073195] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:37,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:37,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:56:37,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768891430] [2021-11-07 00:56:37,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:56:37,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:37,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:56:37,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:56:37,125 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:37,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:37,376 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2021-11-07 00:56:37,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 00:56:37,376 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-07 00:56:37,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:37,378 INFO L225 Difference]: With dead ends: 68 [2021-11-07 00:56:37,378 INFO L226 Difference]: Without dead ends: 66 [2021-11-07 00:56:37,379 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 00:56:37,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-07 00:56:37,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 32. [2021-11-07 00:56:37,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:37,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-11-07 00:56:37,387 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 8 [2021-11-07 00:56:37,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:37,388 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-11-07 00:56:37,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:37,388 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-11-07 00:56:37,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 00:56:37,389 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:37,389 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:37,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:37,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:56:37,604 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:56:37,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:37,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1236409283, now seen corresponding path program 1 times [2021-11-07 00:56:37,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:37,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966627273] [2021-11-07 00:56:37,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:37,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:37,612 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 00:56:37,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070807222] [2021-11-07 00:56:37,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:37,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:56:37,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:56:37,614 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:56:37,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 00:56:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:37,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 00:56:37,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:38,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:38,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:38,104 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:38,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966627273] [2021-11-07 00:56:38,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 00:56:38,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070807222] [2021-11-07 00:56:38,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070807222] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:38,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:38,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:56:38,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348152134] [2021-11-07 00:56:38,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:56:38,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:38,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:56:38,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:56:38,111 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:38,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:38,292 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-11-07 00:56:38,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:56:38,293 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-07 00:56:38,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:38,294 INFO L225 Difference]: With dead ends: 49 [2021-11-07 00:56:38,294 INFO L226 Difference]: Without dead ends: 47 [2021-11-07 00:56:38,295 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:56:38,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-07 00:56:38,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2021-11-07 00:56:38,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:38,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-11-07 00:56:38,304 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 10 [2021-11-07 00:56:38,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:38,304 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-11-07 00:56:38,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:38,305 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-11-07 00:56:38,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 00:56:38,305 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:38,306 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:38,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:38,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:56:38,522 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:56:38,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:38,523 INFO L85 PathProgramCache]: Analyzing trace with hash 971784697, now seen corresponding path program 1 times [2021-11-07 00:56:38,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:38,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396161689] [2021-11-07 00:56:38,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:38,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:38,530 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 00:56:38,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1787594206] [2021-11-07 00:56:38,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:38,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:56:38,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:56:38,542 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:56:38,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 00:56:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:38,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:56:38,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:38,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:38,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:38,742 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:38,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396161689] [2021-11-07 00:56:38,742 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 00:56:38,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787594206] [2021-11-07 00:56:38,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787594206] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:38,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:38,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 00:56:38,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572281788] [2021-11-07 00:56:38,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:56:38,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:38,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:56:38,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:56:38,746 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:38,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:38,813 INFO L93 Difference]: Finished difference Result 116 states and 133 transitions. [2021-11-07 00:56:38,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 00:56:38,814 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 00:56:38,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:38,817 INFO L225 Difference]: With dead ends: 116 [2021-11-07 00:56:38,817 INFO L226 Difference]: Without dead ends: 88 [2021-11-07 00:56:38,818 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 00:56:38,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-07 00:56:38,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2021-11-07 00:56:38,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 69 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:38,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2021-11-07 00:56:38,835 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 12 [2021-11-07 00:56:38,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:38,836 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2021-11-07 00:56:38,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:38,836 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2021-11-07 00:56:38,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 00:56:38,837 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:38,837 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:38,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:39,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:56:39,058 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:56:39,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:39,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1516777280, now seen corresponding path program 1 times [2021-11-07 00:56:39,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:39,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147470274] [2021-11-07 00:56:39,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:39,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:39,067 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 00:56:39,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124046532] [2021-11-07 00:56:39,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:39,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:56:39,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:56:39,069 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:56:39,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 00:56:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:39,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 00:56:39,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:39,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:39,582 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:39,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147470274] [2021-11-07 00:56:39,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 00:56:39,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124046532] [2021-11-07 00:56:39,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124046532] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:39,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:39,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:56:39,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053180498] [2021-11-07 00:56:39,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:56:39,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:39,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:56:39,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:56:39,594 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:39,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:39,675 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2021-11-07 00:56:39,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:56:39,675 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 00:56:39,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:39,677 INFO L225 Difference]: With dead ends: 75 [2021-11-07 00:56:39,677 INFO L226 Difference]: Without dead ends: 73 [2021-11-07 00:56:39,677 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:56:39,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-07 00:56:39,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2021-11-07 00:56:39,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 69 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:39,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2021-11-07 00:56:39,699 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 12 [2021-11-07 00:56:39,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:39,699 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2021-11-07 00:56:39,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:39,700 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2021-11-07 00:56:39,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 00:56:39,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:39,705 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:39,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-07 00:56:39,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:56:39,930 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:56:39,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:39,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1629210339, now seen corresponding path program 1 times [2021-11-07 00:56:39,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:39,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143050290] [2021-11-07 00:56:39,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:39,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:39,959 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 00:56:39,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99131645] [2021-11-07 00:56:39,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:39,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:56:39,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:56:39,967 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:56:39,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 00:56:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:40,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 00:56:40,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:40,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:41,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:41,015 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:41,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143050290] [2021-11-07 00:56:41,016 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 00:56:41,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99131645] [2021-11-07 00:56:41,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99131645] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:41,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:41,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-07 00:56:41,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352795476] [2021-11-07 00:56:41,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:56:41,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:41,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:56:41,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:56:41,018 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:41,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:41,026 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2021-11-07 00:56:41,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 00:56:41,026 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 00:56:41,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:41,027 INFO L225 Difference]: With dead ends: 70 [2021-11-07 00:56:41,027 INFO L226 Difference]: Without dead ends: 0 [2021-11-07 00:56:41,027 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:56:41,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-07 00:56:41,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-07 00:56:41,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:41,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-07 00:56:41,028 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-11-07 00:56:41,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:41,028 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-07 00:56:41,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:41,029 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-07 00:56:41,029 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-07 00:56:41,031 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 00:56:41,032 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 00:56:41,032 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 00:56:41,032 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 00:56:41,032 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 00:56:41,032 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 00:56:41,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:41,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-07 00:56:41,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-07 00:56:41,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:56:41,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:56:41,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:56:41,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:56:41,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:56:41,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:56:41,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:56:41,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:56:41,263 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-11-07 00:56:41,263 INFO L857 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-11-07 00:56:41,264 INFO L853 garLoopResultBuilder]: At program point L11-2(lines 10 16) the Hoare annotation is: false [2021-11-07 00:56:41,264 INFO L857 garLoopResultBuilder]: For program point L11-3(lines 11 14) no Hoare annotation was computed. [2021-11-07 00:56:41,264 INFO L853 garLoopResultBuilder]: At program point L11-5(lines 10 16) the Hoare annotation is: false [2021-11-07 00:56:41,264 INFO L857 garLoopResultBuilder]: For program point L11-6(lines 11 14) no Hoare annotation was computed. [2021-11-07 00:56:41,264 INFO L853 garLoopResultBuilder]: At program point L11-8(lines 10 16) the Hoare annotation is: false [2021-11-07 00:56:41,265 INFO L857 garLoopResultBuilder]: For program point L11-9(lines 11 14) no Hoare annotation was computed. [2021-11-07 00:56:41,265 INFO L853 garLoopResultBuilder]: At program point L11-11(lines 51 52) the Hoare annotation is: false [2021-11-07 00:56:41,265 INFO L857 garLoopResultBuilder]: For program point L11-12(lines 11 14) no Hoare annotation was computed. [2021-11-07 00:56:41,265 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-11-07 00:56:41,265 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-07 00:56:41,266 INFO L853 garLoopResultBuilder]: At program point L11-14(lines 10 16) the Hoare annotation is: false [2021-11-07 00:56:41,266 INFO L857 garLoopResultBuilder]: For program point L11-15(lines 11 14) no Hoare annotation was computed. [2021-11-07 00:56:41,266 INFO L860 garLoopResultBuilder]: At program point L11-17(lines 10 16) the Hoare annotation is: true [2021-11-07 00:56:41,266 INFO L857 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-11-07 00:56:41,266 INFO L857 garLoopResultBuilder]: For program point L12-1(lines 12 13) no Hoare annotation was computed. [2021-11-07 00:56:41,270 INFO L857 garLoopResultBuilder]: For program point L12-2(lines 12 13) no Hoare annotation was computed. [2021-11-07 00:56:41,271 INFO L857 garLoopResultBuilder]: For program point L12-3(lines 12 13) no Hoare annotation was computed. [2021-11-07 00:56:41,272 INFO L857 garLoopResultBuilder]: For program point L12-4(lines 12 13) no Hoare annotation was computed. [2021-11-07 00:56:41,272 INFO L857 garLoopResultBuilder]: For program point L12-5(lines 12 13) no Hoare annotation was computed. [2021-11-07 00:56:41,272 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-11-07 00:56:41,273 INFO L857 garLoopResultBuilder]: For program point L46-1(lines 46 55) no Hoare annotation was computed. [2021-11-07 00:56:41,273 INFO L853 garLoopResultBuilder]: At program point L46-3(lines 46 55) the Hoare annotation is: false [2021-11-07 00:56:41,273 INFO L857 garLoopResultBuilder]: For program point L46-4(lines 46 55) no Hoare annotation was computed. [2021-11-07 00:56:41,273 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-11-07 00:56:41,273 INFO L857 garLoopResultBuilder]: For program point L40(lines 40 67) no Hoare annotation was computed. [2021-11-07 00:56:41,274 INFO L853 garLoopResultBuilder]: At program point L40-2(lines 7 67) the Hoare annotation is: false [2021-11-07 00:56:41,274 INFO L857 garLoopResultBuilder]: For program point L40-3(lines 40 67) no Hoare annotation was computed. [2021-11-07 00:56:41,274 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-11-07 00:56:41,274 INFO L857 garLoopResultBuilder]: For program point L41(lines 41 42) no Hoare annotation was computed. [2021-11-07 00:56:41,274 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-07 00:56:41,275 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-11-07 00:56:41,282 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:41,284 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 00:56:41,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:56:41 BoogieIcfgContainer [2021-11-07 00:56:41,292 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 00:56:41,293 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 00:56:41,293 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 00:56:41,293 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 00:56:41,294 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:56:35" (3/4) ... [2021-11-07 00:56:41,296 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-07 00:56:41,314 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-11-07 00:56:41,315 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-11-07 00:56:41,315 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-07 00:56:41,316 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-07 00:56:41,392 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/witness.graphml [2021-11-07 00:56:41,392 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 00:56:41,394 INFO L168 Benchmark]: Toolchain (without parser) took 7715.93 ms. Allocated memory was 86.0 MB in the beginning and 132.1 MB in the end (delta: 46.1 MB). Free memory was 44.0 MB in the beginning and 105.8 MB in the end (delta: -61.8 MB). Peak memory consumption was 49.7 MB. Max. memory is 16.1 GB. [2021-11-07 00:56:41,395 INFO L168 Benchmark]: CDTParser took 1.36 ms. Allocated memory is still 86.0 MB. Free memory is still 60.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 00:56:41,396 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.55 ms. Allocated memory was 86.0 MB in the beginning and 109.1 MB in the end (delta: 23.1 MB). Free memory was 43.8 MB in the beginning and 80.9 MB in the end (delta: -37.1 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.1 GB. [2021-11-07 00:56:41,396 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.17 ms. Allocated memory is still 109.1 MB. Free memory was 80.9 MB in the beginning and 79.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 00:56:41,397 INFO L168 Benchmark]: Boogie Preprocessor took 48.62 ms. Allocated memory is still 109.1 MB. Free memory was 79.4 MB in the beginning and 77.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 00:56:41,397 INFO L168 Benchmark]: RCFGBuilder took 922.75 ms. Allocated memory is still 109.1 MB. Free memory was 77.8 MB in the beginning and 74.0 MB in the end (delta: 3.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-07 00:56:41,398 INFO L168 Benchmark]: TraceAbstraction took 6266.08 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 73.4 MB in the beginning and 45.7 MB in the end (delta: 27.8 MB). Peak memory consumption was 53.5 MB. Max. memory is 16.1 GB. [2021-11-07 00:56:41,398 INFO L168 Benchmark]: Witness Printer took 99.67 ms. Allocated memory is still 132.1 MB. Free memory was 45.7 MB in the beginning and 105.8 MB in the end (delta: -60.1 MB). Peak memory consumption was 2.7 MB. Max. memory is 16.1 GB. [2021-11-07 00:56:41,401 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.36 ms. Allocated memory is still 86.0 MB. Free memory is still 60.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 306.55 ms. Allocated memory was 86.0 MB in the beginning and 109.1 MB in the end (delta: 23.1 MB). Free memory was 43.8 MB in the beginning and 80.9 MB in the end (delta: -37.1 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 61.17 ms. Allocated memory is still 109.1 MB. Free memory was 80.9 MB in the beginning and 79.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 48.62 ms. Allocated memory is still 109.1 MB. Free memory was 79.4 MB in the beginning and 77.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 922.75 ms. Allocated memory is still 109.1 MB. Free memory was 77.8 MB in the beginning and 74.0 MB in the end (delta: 3.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6266.08 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 73.4 MB in the beginning and 45.7 MB in the end (delta: 27.8 MB). Peak memory consumption was 53.5 MB. Max. memory is 16.1 GB. * Witness Printer took 99.67 ms. Allocated memory is still 132.1 MB. Free memory was 45.7 MB in the beginning and 105.8 MB in the end (delta: -60.1 MB). Peak memory consumption was 2.7 MB. Max. memory is 16.1 GB. * 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 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 6.1s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 196 SDtfs, 161 SDslu, 428 SDs, 0 SdLazy, 188 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 142 GetRequests, 100 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=6, InterpolantAutomatonStates: 38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 89 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 9 NumberOfFragments, 8 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 132 ConstructedInterpolants, 2 QuantifiedInterpolants, 1028 SizeOfPredicates, 32 NumberOfNonLiveVariables, 713 ConjunctsInSsa, 61 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 4/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 51]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 0 RESULT: Ultimate proved your program to be correct! [2021-11-07 00:56:41,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75e1d39b-0581-4417-b40e-ef65cf71eddf/bin/utaipan-UUZaoUuFF8/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: TRUE