./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.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_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/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_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/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_c4945ee2-07b7-4208-8b47-4320a63bcdca/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 28cfabe4b70eff8f7baaccb87c67f08c79dbf056ceeb2a0d56109f4b60f10f62 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:40:22,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:40:22,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:40:22,136 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:40:22,137 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:40:22,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:40:22,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:40:22,143 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:40:22,146 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:40:22,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:40:22,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:40:22,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:40:22,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:40:22,153 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:40:22,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:40:22,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:40:22,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:40:22,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:40:22,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:40:22,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:40:22,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:40:22,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:40:22,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:40:22,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:40:22,176 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:40:22,177 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:40:22,177 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:40:22,179 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:40:22,179 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:40:22,190 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:40:22,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:40:22,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:40:22,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:40:22,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:40:22,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:40:22,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:40:22,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:40:22,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:40:22,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:40:22,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:40:22,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:40:22,204 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:40:22,253 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:40:22,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:40:22,255 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:40:22,255 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:40:22,255 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:40:22,256 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:40:22,256 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:40:22,256 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:40:22,256 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:40:22,257 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:40:22,264 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:40:22,265 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:40:22,265 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:40:22,265 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:40:22,266 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:40:22,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:40:22,267 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:40:22,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:40:22,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:40:22,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:40:22,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:40:22,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:40:22,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:40:22,269 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:40:22,269 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:40:22,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:40:22,270 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:40:22,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:40:22,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:40:22,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:40:22,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:40:22,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:40:22,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:40:22,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:40:22,274 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:40:22,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:40:22,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:40:22,274 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:40:22,275 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:40:22,275 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_c4945ee2-07b7-4208-8b47-4320a63bcdca/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28cfabe4b70eff8f7baaccb87c67f08c79dbf056ceeb2a0d56109f4b60f10f62 [2021-11-07 01:40:22,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:40:22,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:40:22,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:40:22,644 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:40:22,645 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:40:22,646 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c [2021-11-07 01:40:22,718 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/data/7dc1c805d/6f5f3b2225824e56a93ea11089861f06/FLAG7cac82aa5 [2021-11-07 01:40:23,232 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:40:23,233 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c [2021-11-07 01:40:23,240 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/data/7dc1c805d/6f5f3b2225824e56a93ea11089861f06/FLAG7cac82aa5 [2021-11-07 01:40:23,610 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/data/7dc1c805d/6f5f3b2225824e56a93ea11089861f06 [2021-11-07 01:40:23,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:40:23,613 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:40:23,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:40:23,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:40:23,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:40:23,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:40:23" (1/1) ... [2021-11-07 01:40:23,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d33ac04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:23, skipping insertion in model container [2021-11-07 01:40:23,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:40:23" (1/1) ... [2021-11-07 01:40:23,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:40:23,655 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:40:23,835 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_c4945ee2-07b7-4208-8b47-4320a63bcdca/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c[537,550] [2021-11-07 01:40:23,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:40:23,880 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:40:23,896 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_c4945ee2-07b7-4208-8b47-4320a63bcdca/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c[537,550] [2021-11-07 01:40:23,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:40:23,931 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:40:23,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:23 WrapperNode [2021-11-07 01:40:23,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:40:23,933 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:40:23,933 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:40:23,933 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:40:23,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:23" (1/1) ... [2021-11-07 01:40:23,957 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:23" (1/1) ... [2021-11-07 01:40:23,987 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:40:23,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:40:23,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:40:23,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:40:23,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:23" (1/1) ... [2021-11-07 01:40:23,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:23" (1/1) ... [2021-11-07 01:40:23,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:23" (1/1) ... [2021-11-07 01:40:23,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:23" (1/1) ... [2021-11-07 01:40:24,002 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:23" (1/1) ... [2021-11-07 01:40:24,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:23" (1/1) ... [2021-11-07 01:40:24,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:23" (1/1) ... [2021-11-07 01:40:24,010 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:40:24,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:40:24,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:40:24,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:40:24,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:23" (1/1) ... [2021-11-07 01:40:24,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:40:24,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:40:24,041 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:40:24,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:40:24,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:40:24,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:40:24,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:40:24,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:40:24,482 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:40:24,483 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-11-07 01:40:24,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:40:24 BoogieIcfgContainer [2021-11-07 01:40:24,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:40:24,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:40:24,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:40:24,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:40:24,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:40:23" (1/3) ... [2021-11-07 01:40:24,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ccbf18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:40:24, skipping insertion in model container [2021-11-07 01:40:24,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:23" (2/3) ... [2021-11-07 01:40:24,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ccbf18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:40:24, skipping insertion in model container [2021-11-07 01:40:24,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:40:24" (3/3) ... [2021-11-07 01:40:24,493 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound20.c [2021-11-07 01:40:24,499 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:40:24,499 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-07 01:40:24,544 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:40:24,550 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 01:40:24,550 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-07 01:40:24,565 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 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 01:40:24,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-07 01:40:24,569 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:24,570 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-07 01:40:24,570 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:40:24,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:24,576 INFO L85 PathProgramCache]: Analyzing trace with hash 155587567, now seen corresponding path program 1 times [2021-11-07 01:40:24,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:40:24,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549225545] [2021-11-07 01:40:24,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:24,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:40:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:24,798 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 01:40:24,799 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:40:24,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549225545] [2021-11-07 01:40:24,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549225545] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:24,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:24,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:40:24,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964718435] [2021-11-07 01:40:24,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:24,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:40:24,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:24,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:24,823 INFO L87 Difference]: Start difference. First operand has 35 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 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 01:40:27,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:27,081 INFO L93 Difference]: Finished difference Result 92 states and 126 transitions. [2021-11-07 01:40:27,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:40:27,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 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 01:40:27,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:27,106 INFO L225 Difference]: With dead ends: 92 [2021-11-07 01:40:27,106 INFO L226 Difference]: Without dead ends: 54 [2021-11-07 01:40:27,109 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:40:27,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-07 01:40:27,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 31. [2021-11-07 01:40:27,141 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 01:40:27,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-11-07 01:40:27,144 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 5 [2021-11-07 01:40:27,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:27,144 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-11-07 01:40:27,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 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 01:40:27,145 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-11-07 01:40:27,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 01:40:27,146 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:27,146 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:27,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:40:27,147 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:40:27,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:27,148 INFO L85 PathProgramCache]: Analyzing trace with hash -804784526, now seen corresponding path program 1 times [2021-11-07 01:40:27,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:40:27,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030323176] [2021-11-07 01:40:27,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:27,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:40:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:27,196 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 01:40:27,196 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:40:27,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030323176] [2021-11-07 01:40:27,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030323176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:27,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:27,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:40:27,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002024068] [2021-11-07 01:40:27,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:27,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:40:27,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:27,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:27,201 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 01:40:27,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:27,223 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2021-11-07 01:40:27,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:40:27,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 01:40:27,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:27,225 INFO L225 Difference]: With dead ends: 51 [2021-11-07 01:40:27,225 INFO L226 Difference]: Without dead ends: 33 [2021-11-07 01:40:27,226 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:27,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-07 01:40:27,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-07 01:40:27,232 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 01:40:27,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-11-07 01:40:27,234 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 7 [2021-11-07 01:40:27,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:27,234 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-11-07 01:40:27,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 01:40:27,235 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-11-07 01:40:27,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 01:40:27,235 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:27,236 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:27,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:40:27,236 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:40:27,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:27,237 INFO L85 PathProgramCache]: Analyzing trace with hash -804047694, now seen corresponding path program 1 times [2021-11-07 01:40:27,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:40:27,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870308134] [2021-11-07 01:40:27,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:27,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:40:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:27,326 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 01:40:27,327 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:40:27,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870308134] [2021-11-07 01:40:27,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870308134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:27,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:27,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:40:27,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86625263] [2021-11-07 01:40:27,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:27,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:40:27,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:27,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:27,335 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 01:40:27,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:27,419 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-11-07 01:40:27,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:40:27,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 01:40:27,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:27,421 INFO L225 Difference]: With dead ends: 51 [2021-11-07 01:40:27,421 INFO L226 Difference]: Without dead ends: 49 [2021-11-07 01:40:27,422 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:40:27,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-07 01:40:27,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2021-11-07 01:40:27,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3076923076923077) 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 01:40:27,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-11-07 01:40:27,428 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 7 [2021-11-07 01:40:27,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:27,429 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-11-07 01:40:27,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 01:40:27,430 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-11-07 01:40:27,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:40:27,430 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:27,430 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:27,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:40:27,431 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:40:27,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:27,432 INFO L85 PathProgramCache]: Analyzing trace with hash 404435477, now seen corresponding path program 1 times [2021-11-07 01:40:27,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:40:27,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672437373] [2021-11-07 01:40:27,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:27,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:40:27,450 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:40:27,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461502285] [2021-11-07 01:40:27,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:27,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:40:27,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:40:27,476 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:40:27,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:40:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:27,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:40:27,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:27,727 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 01:40:27,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:27,827 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 01:40:27,827 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:40:27,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672437373] [2021-11-07 01:40:27,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:40:27,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461502285] [2021-11-07 01:40:27,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461502285] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:27,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:27,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:40:27,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675575805] [2021-11-07 01:40:27,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:40:27,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:40:27,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:40:27,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:40:27,831 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 01:40:32,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:32,310 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2021-11-07 01:40:32,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:40:32,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 9 [2021-11-07 01:40:32,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:32,313 INFO L225 Difference]: With dead ends: 86 [2021-11-07 01:40:32,313 INFO L226 Difference]: Without dead ends: 78 [2021-11-07 01:40:32,314 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:40:32,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-07 01:40:32,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2021-11-07 01:40:32,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:32,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2021-11-07 01:40:32,326 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 9 [2021-11-07 01:40:32,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:32,327 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2021-11-07 01:40:32,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 01:40:32,327 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2021-11-07 01:40:32,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:40:32,328 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:32,328 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:32,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-07 01:40:32,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:40:32,546 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:40:32,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:32,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1567670847, now seen corresponding path program 1 times [2021-11-07 01:40:32,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:40:32,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650884381] [2021-11-07 01:40:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:32,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:40:32,578 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:40:32,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082617443] [2021-11-07 01:40:32,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:32,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:40:32,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:40:32,586 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:40:32,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 01:40:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:32,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:40:32,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:33,019 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 01:40:33,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:33,257 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 01:40:33,258 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:40:33,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650884381] [2021-11-07 01:40:33,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:40:33,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082617443] [2021-11-07 01:40:33,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082617443] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:33,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:33,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:40:33,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442381152] [2021-11-07 01:40:33,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:40:33,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:40:33,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:40:33,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:40:33,261 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 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 01:40:37,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:37,955 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2021-11-07 01:40:37,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:40:37,956 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 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 13 [2021-11-07 01:40:37,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:37,957 INFO L225 Difference]: With dead ends: 78 [2021-11-07 01:40:37,958 INFO L226 Difference]: Without dead ends: 72 [2021-11-07 01:40:37,958 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:40:37,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-07 01:40:37,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2021-11-07 01:40:37,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:37,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2021-11-07 01:40:37,970 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 13 [2021-11-07 01:40:37,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:37,971 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2021-11-07 01:40:37,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 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 01:40:37,972 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2021-11-07 01:40:37,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 01:40:37,973 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:37,973 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:38,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:38,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:40:38,199 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:40:38,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:38,200 INFO L85 PathProgramCache]: Analyzing trace with hash 487859498, now seen corresponding path program 1 times [2021-11-07 01:40:38,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:40:38,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030086204] [2021-11-07 01:40:38,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:38,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:40:38,234 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:40:38,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701788350] [2021-11-07 01:40:38,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:38,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:40:38,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:40:38,248 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:40:38,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 01:40:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:38,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:40:38,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:38,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:38,593 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:40:38,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030086204] [2021-11-07 01:40:38,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:40:38,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701788350] [2021-11-07 01:40:38,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701788350] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:40:38,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [144865084] [2021-11-07 01:40:38,626 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-07 01:40:38,626 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:40:38,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:40:38,648 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:40:38,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:40:38,718 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:38,729 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:40:38,731 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:38,732 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:40:38,733 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:40:38,735 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:38,737 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 01:40:38,742 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 161 [2021-11-07 01:40:38,790 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 21=[|v_#valid_14|]} [2021-11-07 01:40:38,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:38,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:38,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:38,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 01:40:38,848 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:38,850 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:40:38,851 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:38,852 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:40:38,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:40:38,863 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 01:40:38,864 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:38,865 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 01:40:38,865 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:38,866 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 01:40:38,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:40:38,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:38,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:38,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:38,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:38,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:38,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:38,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:38,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:38,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:38,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:38,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:38,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 01:40:38,955 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:38,960 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:40:38,961 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:38,962 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:40:38,962 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 01:40:38,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:38,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:39,002 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:39,005 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-07 01:40:39,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:40:39,009 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:294, output treesize:121 [2021-11-07 01:40:39,018 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:39,031 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-07 01:40:39,054 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.0 percent of original size [2021-11-07 01:40:39,061 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 144 [2021-11-07 01:40:39,080 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:39,102 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 153 [2021-11-07 01:40:39,124 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:39,158 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 164 [2021-11-07 01:40:39,179 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:39,190 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 152 [2021-11-07 01:40:39,199 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:39,209 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 157 [2021-11-07 01:40:39,222 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.4 percent of original size [2021-11-07 01:40:39,235 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 167 [2021-11-07 01:40:39,249 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:39,266 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 171 [2021-11-07 01:40:39,279 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:39,298 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-11-07 01:40:39,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:39,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:39,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:39,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:39,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:39,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:39,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:39,477 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:39,503 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-11-07 01:40:39,510 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:39,519 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-11-07 01:40:39,529 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:39,542 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-11-07 01:40:39,556 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:39,571 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 188 [2021-11-07 01:40:39,588 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:39,610 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 199 [2021-11-07 01:40:39,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:39,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:39,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:39,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:39,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:39,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:39,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:39,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:39,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:39,733 INFO L180 QuantifierPusher]: treesize reduction 42, result has 63.5 percent of original size [2021-11-07 01:40:39,739 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-11-07 01:40:39,742 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:39,746 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-11-07 01:40:39,752 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:39,759 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-07 01:40:39,764 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:39,772 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-07 01:40:39,777 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:39,787 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 108 [2021-11-07 01:40:39,801 INFO L180 QuantifierPusher]: treesize reduction 42, result has 63.5 percent of original size [2021-11-07 01:40:39,808 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-11-07 01:40:39,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:39,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:39,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:39,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:39,896 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:39,907 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-11-07 01:40:39,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:39,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:39,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:39,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:39,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:40,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:40,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:40,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:40,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:40,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:40,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:40,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:40,170 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:40,200 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 207 [2021-11-07 01:40:40,210 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:40,218 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 212 [2021-11-07 01:40:40,231 INFO L180 QuantifierPusher]: treesize reduction 4, result has 98.2 percent of original size [2021-11-07 01:40:40,239 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 207 [2021-11-07 01:40:40,250 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:40,256 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:40:40,259 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:40,265 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:40:40,269 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:40,274 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 144 [2021-11-07 01:40:40,279 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 144 [2021-11-07 01:40:40,286 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:40:40,290 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:40,302 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 138 [2021-11-07 01:40:40,306 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 218 [2021-11-07 01:40:40,327 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:40,340 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:40:40,346 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:40,358 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:40:40,368 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:40,374 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:40:40,377 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:40,383 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:40:40,387 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:40,397 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 153 [2021-11-07 01:40:40,401 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 153 [2021-11-07 01:40:40,406 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:40:40,410 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:40,416 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-07 01:40:40,430 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 471 [2021-11-07 01:40:40,440 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 471 [2021-11-07 01:40:40,493 INFO L185 QuantifierPusher]: treesize reduction 55, result has 86.2 percent of original size 343 [2021-11-07 01:40:40,536 INFO L180 QuantifierPusher]: treesize reduction 55, result has 87.2 percent of original size [2021-11-07 01:40:40,551 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 352 [2021-11-07 01:40:40,583 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:40,593 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 363 [2021-11-07 01:40:40,597 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:41:03,067 WARN L207 SmtUtils]: Spent 16.60 s on a formula simplification. DAG size of input: 133 DAG size of output: 105 [2021-11-07 01:41:06,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:41:06,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:41:06,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-07 01:41:06,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143872968] [2021-11-07 01:41:06,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:41:06,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:41:06,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:41:06,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:41:06,293 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 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 01:41:06,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:06,505 INFO L93 Difference]: Finished difference Result 117 states and 132 transitions. [2021-11-07 01:41:06,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:41:06,506 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 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 16 [2021-11-07 01:41:06,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:06,507 INFO L225 Difference]: With dead ends: 117 [2021-11-07 01:41:06,507 INFO L226 Difference]: Without dead ends: 91 [2021-11-07 01:41:06,508 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:41:06,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-07 01:41:06,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 69. [2021-11-07 01:41:06,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.21875) internal successors, (78), 68 states have internal predecessors, (78), 0 states have call successors, (0), 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 01:41:06,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2021-11-07 01:41:06,521 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 16 [2021-11-07 01:41:06,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:06,521 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2021-11-07 01:41:06,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 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 01:41:06,522 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2021-11-07 01:41:06,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 01:41:06,523 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:06,523 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:06,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:06,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-07 01:41:06,737 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:41:06,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:06,737 INFO L85 PathProgramCache]: Analyzing trace with hash -406933002, now seen corresponding path program 1 times [2021-11-07 01:41:06,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:41:06,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891872536] [2021-11-07 01:41:06,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:06,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:41:06,766 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:41:06,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [997891199] [2021-11-07 01:41:06,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:06,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:41:06,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:41:06,775 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:41:06,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4945ee2-07b7-4208-8b47-4320a63bcdca/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process