./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE --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 34fd2c5bce28a2f0a39de6b9c2d306403d911c32b4998862fc7a657ddcb319f4 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 11:07:56,150 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 11:07:56,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 11:07:56,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 11:07:56,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 11:07:56,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 11:07:56,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 11:07:56,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 11:07:56,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 11:07:56,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 11:07:56,248 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 11:07:56,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 11:07:56,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 11:07:56,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 11:07:56,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 11:07:56,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 11:07:56,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 11:07:56,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 11:07:56,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 11:07:56,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 11:07:56,286 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 11:07:56,287 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 11:07:56,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 11:07:56,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 11:07:56,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 11:07:56,303 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 11:07:56,304 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 11:07:56,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 11:07:56,307 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 11:07:56,309 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 11:07:56,310 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 11:07:56,311 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 11:07:56,313 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 11:07:56,315 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 11:07:56,318 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 11:07:56,318 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 11:07:56,319 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 11:07:56,319 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 11:07:56,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 11:07:56,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 11:07:56,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 11:07:56,323 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 11:07:56,369 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 11:07:56,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 11:07:56,371 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 11:07:56,372 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 11:07:56,372 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 11:07:56,372 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 11:07:56,372 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 11:07:56,373 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 11:07:56,379 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 11:07:56,379 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 11:07:56,381 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 11:07:56,381 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 11:07:56,381 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 11:07:56,382 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 11:07:56,382 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 11:07:56,383 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 11:07:56,383 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 11:07:56,383 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 11:07:56,383 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 11:07:56,384 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 11:07:56,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 11:07:56,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 11:07:56,384 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 11:07:56,385 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 11:07:56,385 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 11:07:56,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 11:07:56,385 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 11:07:56,386 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 11:07:56,386 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 11:07:56,387 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 11:07:56,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:07:56,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 11:07:56,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 11:07:56,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 11:07:56,389 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 11:07:56,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 11:07:56,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 11:07:56,390 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 11:07:56,390 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 11:07:56,390 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_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34fd2c5bce28a2f0a39de6b9c2d306403d911c32b4998862fc7a657ddcb319f4 [2021-10-24 11:07:56,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 11:07:56,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 11:07:56,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 11:07:56,739 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 11:07:56,740 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 11:07:56,741 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c [2021-10-24 11:07:56,816 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/data/f31364b30/17d47fb732704a9ebb24b5b3153a602b/FLAGb45f64102 [2021-10-24 11:07:57,448 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 11:07:57,450 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c [2021-10-24 11:07:57,465 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/data/f31364b30/17d47fb732704a9ebb24b5b3153a602b/FLAGb45f64102 [2021-10-24 11:07:57,792 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/data/f31364b30/17d47fb732704a9ebb24b5b3153a602b [2021-10-24 11:07:57,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 11:07:57,800 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 11:07:57,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 11:07:57,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 11:07:57,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 11:07:57,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:07:57" (1/1) ... [2021-10-24 11:07:57,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d30d57a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:07:57, skipping insertion in model container [2021-10-24 11:07:57,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:07:57" (1/1) ... [2021-10-24 11:07:57,823 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 11:07:57,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 11:07:58,059 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_771b689d-3b50-4a0c-8d1e-1763a50c0e81/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c[458,471] [2021-10-24 11:07:58,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:07:58,085 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 11:07:58,099 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_771b689d-3b50-4a0c-8d1e-1763a50c0e81/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c[458,471] [2021-10-24 11:07:58,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:07:58,121 INFO L208 MainTranslator]: Completed translation [2021-10-24 11:07:58,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:07:58 WrapperNode [2021-10-24 11:07:58,121 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 11:07:58,122 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 11:07:58,123 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 11:07:58,123 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 11:07:58,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:07:58" (1/1) ... [2021-10-24 11:07:58,137 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:07:58" (1/1) ... [2021-10-24 11:07:58,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 11:07:58,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 11:07:58,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 11:07:58,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 11:07:58,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:07:58" (1/1) ... [2021-10-24 11:07:58,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:07:58" (1/1) ... [2021-10-24 11:07:58,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:07:58" (1/1) ... [2021-10-24 11:07:58,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:07:58" (1/1) ... [2021-10-24 11:07:58,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:07:58" (1/1) ... [2021-10-24 11:07:58,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:07:58" (1/1) ... [2021-10-24 11:07:58,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:07:58" (1/1) ... [2021-10-24 11:07:58,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 11:07:58,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 11:07:58,181 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 11:07:58,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 11:07:58,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:07:58" (1/1) ... [2021-10-24 11:07:58,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:07:58,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:07:58,232 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 11:07:58,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 11:07:58,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 11:07:58,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 11:07:58,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 11:07:58,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 11:07:58,625 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 11:07:58,625 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-24 11:07:58,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:07:58 BoogieIcfgContainer [2021-10-24 11:07:58,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 11:07:58,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 11:07:58,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 11:07:58,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 11:07:58,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:07:57" (1/3) ... [2021-10-24 11:07:58,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2862994d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:07:58, skipping insertion in model container [2021-10-24 11:07:58,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:07:58" (2/3) ... [2021-10-24 11:07:58,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2862994d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:07:58, skipping insertion in model container [2021-10-24 11:07:58,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:07:58" (3/3) ... [2021-10-24 11:07:58,639 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound10.c [2021-10-24 11:07:58,645 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 11:07:58,645 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-24 11:07:58,726 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 11:07:58,740 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 [2021-10-24 11:07:58,740 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-24 11:07:58,756 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:07:58,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-24 11:07:58,762 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:07:58,762 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-24 11:07:58,763 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:07:58,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:07:58,770 INFO L82 PathProgramCache]: Analyzing trace with hash 81490399, now seen corresponding path program 1 times [2021-10-24 11:07:58,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:07:58,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906102242] [2021-10-24 11:07:58,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:07:58,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:07:58,892 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-24 11:07:58,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470900346] [2021-10-24 11:07:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:07:58,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:07:58,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:07:58,896 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:07:58,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-24 11:07:58,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:07:58,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-24 11:07:58,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:07:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:07:59,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:08:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:08:20,674 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:08:20,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906102242] [2021-10-24 11:08:20,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-24 11:08:20,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470900346] [2021-10-24 11:08:20,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470900346] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:08:20,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:08:20,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-24 11:08:20,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958319378] [2021-10-24 11:08:20,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 11:08:20,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:08:20,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 11:08:20,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-10-24 11:08:20,701 INFO L87 Difference]: Start difference. First operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:08:21,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:08:21,391 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2021-10-24 11:08:21,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 11:08:21,393 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-24 11:08:21,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:08:21,403 INFO L225 Difference]: With dead ends: 40 [2021-10-24 11:08:21,403 INFO L226 Difference]: Without dead ends: 13 [2021-10-24 11:08:21,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21752.0ms TimeCoverageRelationStatistics Valid=18, Invalid=23, Unknown=1, NotChecked=0, Total=42 [2021-10-24 11:08:21,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-24 11:08:21,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-24 11:08:21,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:08:21,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-10-24 11:08:21,444 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 5 [2021-10-24 11:08:21,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:08:21,445 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-24 11:08:21,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:08:21,446 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-10-24 11:08:21,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-24 11:08:21,446 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:08:21,447 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:08:21,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-24 11:08:21,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-24 11:08:21,663 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:08:21,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:08:21,664 INFO L82 PathProgramCache]: Analyzing trace with hash 908273882, now seen corresponding path program 1 times [2021-10-24 11:08:21,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:08:21,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908866106] [2021-10-24 11:08:21,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:08:21,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:08:21,704 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-24 11:08:21,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145136116] [2021-10-24 11:08:21,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:08:21,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:08:21,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:08:21,709 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:08:21,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-24 11:08:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:08:21,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 11:08:21,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:08:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:08:21,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:08:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:08:21,956 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:08:21,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908866106] [2021-10-24 11:08:21,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-24 11:08:21,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145136116] [2021-10-24 11:08:21,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145136116] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:08:21,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1226734047] [2021-10-24 11:08:21,991 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-24 11:08:21,991 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 11:08:22,000 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 11:08:22,008 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 11:08:22,009 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 11:08:22,062 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:22,070 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:08:22,071 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:22,071 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 11:08:22,078 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:08:22,079 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:22,081 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-24 11:08:22,088 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-10-24 11:08:22,117 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-10-24 11:08:22,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:22,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:22,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:22,159 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 [2021-10-24 11:08:22,160 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:22,162 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 11:08:22,164 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:22,165 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 11:08:22,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 11:08:22,168 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:22,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:22,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:22,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:22,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:22,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:22,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:22,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:22,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:22,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:22,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:22,289 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 [2021-10-24 11:08:22,291 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:22,300 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 11:08:22,301 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:22,303 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 11:08:22,303 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 11:08:22,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:22,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:22,367 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:22,370 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-10-24 11:08:22,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-24 11:08:22,373 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:136, output treesize:111 [2021-10-24 11:08:22,385 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:22,393 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-10-24 11:08:22,409 INFO L180 QuantifierPusher]: treesize reduction 23, result has 88.0 percent of original size [2021-10-24 11:08:22,420 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-10-24 11:08:22,431 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:22,443 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 132 [2021-10-24 11:08:22,454 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:22,461 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 137 [2021-10-24 11:08:22,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:22,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:22,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:22,622 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:22,638 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:08:22,643 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:22,672 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 235 [2021-10-24 11:08:22,701 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 358 [2021-10-24 11:08:22,716 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:22,742 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 446 [2021-10-24 11:08:22,756 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:22,773 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 451 [2021-10-24 11:08:22,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:22,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:22,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:22,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:22,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:22,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:22,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:22,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:22,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:22,933 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-10-24 11:08:22,938 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-10-24 11:08:22,944 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:22,954 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-24 11:08:22,960 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:22,965 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-10-24 11:08:22,976 INFO L180 QuantifierPusher]: treesize reduction 34, result has 60.5 percent of original size [2021-10-24 11:08:22,979 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-10-24 11:08:22,991 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-10-24 11:08:22,997 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-10-24 11:08:23,006 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:23,014 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-24 11:08:23,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:23,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:23,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:23,048 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:23,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:23,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:23,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:23,085 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-24 11:08:23,983 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-24 11:08:23,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-24 11:08:23,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-24 11:08:23,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878138382] [2021-10-24 11:08:23,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 11:08:23,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:08:23,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 11:08:23,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-10-24 11:08:23,987 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:08:24,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:08:24,064 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-10-24 11:08:24,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-24 11:08:24,065 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-24 11:08:24,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:08:24,066 INFO L225 Difference]: With dead ends: 35 [2021-10-24 11:08:24,066 INFO L226 Difference]: Without dead ends: 31 [2021-10-24 11:08:24,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 980.8ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-10-24 11:08:24,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-24 11:08:24,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-10-24 11:08:24,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:08:24,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-10-24 11:08:24,074 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 10 [2021-10-24 11:08:24,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:08:24,075 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-10-24 11:08:24,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:08:24,075 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-10-24 11:08:24,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-24 11:08:24,076 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:08:24,076 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-24 11:08:24,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-24 11:08:24,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-24 11:08:24,277 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:08:24,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:08:24,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1019667251, now seen corresponding path program 1 times [2021-10-24 11:08:24,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:08:24,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134998028] [2021-10-24 11:08:24,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:08:24,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:08:24,290 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-24 11:08:24,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [537829822] [2021-10-24 11:08:24,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:08:24,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:08:24,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:08:24,292 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:08:24,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-24 11:08:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:08:24,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-24 11:08:24,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:08:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:08:24,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:08:46,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:08:46,979 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:08:46,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134998028] [2021-10-24 11:08:46,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-24 11:08:46,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537829822] [2021-10-24 11:08:46,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537829822] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:08:46,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1337565520] [2021-10-24 11:08:46,983 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-24 11:08:46,983 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 11:08:46,984 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 11:08:46,984 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 11:08:46,984 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 11:08:46,991 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:46,992 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:08:46,993 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:46,993 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 11:08:46,994 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:08:46,995 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:46,996 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-24 11:08:46,998 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-10-24 11:08:47,002 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-10-24 11:08:47,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:47,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:47,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:47,015 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 [2021-10-24 11:08:47,016 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:47,017 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 11:08:47,017 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:47,018 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 11:08:47,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 11:08:47,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:47,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:47,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:47,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:47,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:47,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:47,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:47,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:47,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:47,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:47,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:47,051 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 [2021-10-24 11:08:47,052 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:47,055 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 11:08:47,056 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:47,057 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 11:08:47,057 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 11:08:47,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:47,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:47,066 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:47,068 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-10-24 11:08:47,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-24 11:08:47,069 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:136, output treesize:111 [2021-10-24 11:08:47,075 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:47,078 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-10-24 11:08:47,084 INFO L180 QuantifierPusher]: treesize reduction 23, result has 88.0 percent of original size [2021-10-24 11:08:47,088 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-10-24 11:08:47,113 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:47,120 INFO L185 QuantifierPusher]: treesize reduction 14, result has 91.4 percent of original size 149 [2021-10-24 11:08:47,126 INFO L180 QuantifierPusher]: treesize reduction 14, result has 91.9 percent of original size [2021-10-24 11:08:47,130 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 154 [2021-10-24 11:08:47,135 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:47,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:47,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:47,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:47,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:47,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:47,172 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-10-24 11:08:47,175 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-10-24 11:08:47,180 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:47,185 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-24 11:08:47,188 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:47,192 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-10-24 11:08:47,201 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-10-24 11:08:47,204 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-10-24 11:08:47,214 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:47,221 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 106 [2021-10-24 11:08:47,230 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:08:47,236 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-24 11:08:47,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:47,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:47,251 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:47,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:47,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:47,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:47,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:08:47,282 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-24 11:08:48,500 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-24 11:08:48,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-24 11:08:48,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-24 11:08:48,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826861951] [2021-10-24 11:08:48,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-24 11:08:48,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:08:48,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-24 11:08:48,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=308, Unknown=2, NotChecked=0, Total=380 [2021-10-24 11:08:48,502 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:15,579 WARN L207 SmtUtils]: Spent 6.13 s on a formula simplification that was a NOOP. DAG size: 50 [2021-10-24 11:09:31,784 WARN L207 SmtUtils]: Spent 8.10 s on a formula simplification that was a NOOP. DAG size: 51 [2021-10-24 11:09:33,796 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0))) (and (or (= (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~k~0) .cse0) (< c_ULTIMATE.start_main_~c~0 c_ULTIMATE.start_main_~k~0)) (let ((.cse1 (* (- 13) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (.cse2 (* (- 1) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (.cse3 (* (- 6) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0))) (or (forall ((ULTIMATE.start_main_~k~0 Int)) (or (< (+ c_ULTIMATE.start_main_~c~0 1) ULTIMATE.start_main_~k~0) (= (+ (* 2 c_ULTIMATE.start_main_~y~0) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) 1) (+ ULTIMATE.start_main_~k~0 (* c_ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~k~0))) (<= ULTIMATE.start_main_~k~0 c_ULTIMATE.start_main_~c~0))) (not (= (mod (+ .cse1 .cse2 .cse3) (- 4)) 0)) (< (+ c_ULTIMATE.start_main_~x~0 (* 3 .cse0) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) 1) (div (+ .cse1 .cse2 (- 4) .cse3) (- 4))))))) is different from false [2021-10-24 11:09:33,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:09:33,921 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-10-24 11:09:33,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-24 11:09:33,922 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-24 11:09:33,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:09:33,923 INFO L225 Difference]: With dead ends: 31 [2021-10-24 11:09:33,923 INFO L226 Difference]: Without dead ends: 25 [2021-10-24 11:09:33,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 60366.0ms TimeCoverageRelationStatistics Valid=159, Invalid=591, Unknown=10, NotChecked=52, Total=812 [2021-10-24 11:09:33,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-24 11:09:33,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-10-24 11:09:33,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:33,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-10-24 11:09:33,933 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 12 [2021-10-24 11:09:33,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:09:33,934 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-10-24 11:09:33,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:33,934 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-10-24 11:09:33,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 11:09:33,935 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:09:33,936 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1] [2021-10-24 11:09:33,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-24 11:09:34,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-24 11:09:34,151 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:09:34,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:09:34,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1641908438, now seen corresponding path program 2 times [2021-10-24 11:09:34,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:09:34,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565399688] [2021-10-24 11:09:34,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:09:34,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:09:34,165 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-24 11:09:34,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480532407] [2021-10-24 11:09:34,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 11:09:34,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:09:34,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:09:34,182 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:09:34,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-24 11:09:34,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-24 11:09:34,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:09:34,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 11:09:34,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:09:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:34,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:09:35,118 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:35,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:09:35,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565399688] [2021-10-24 11:09:35,119 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-24 11:09:35,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480532407] [2021-10-24 11:09:35,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480532407] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:09:35,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [834719600] [2021-10-24 11:09:35,122 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-24 11:09:35,122 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 11:09:35,123 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 11:09:35,123 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 11:09:35,123 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 11:09:35,145 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:35,146 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:09:35,151 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:35,152 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-24 11:09:35,152 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:09:35,153 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:35,154 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 11:09:35,156 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-10-24 11:09:35,162 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 21=[|v_#valid_12|]} [2021-10-24 11:09:35,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:35,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:35,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:35,179 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 [2021-10-24 11:09:35,180 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:35,181 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 11:09:35,184 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:35,185 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 11:09:35,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 11:09:35,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:35,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:35,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:35,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:35,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:35,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:35,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:35,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:35,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:35,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:35,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:35,220 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 [2021-10-24 11:09:35,221 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:35,225 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 11:09:35,226 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:35,226 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 11:09:35,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 11:09:35,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:35,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:35,236 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:35,238 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-10-24 11:09:35,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-24 11:09:35,239 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:136, output treesize:111 [2021-10-24 11:09:35,244 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:35,248 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-10-24 11:09:35,260 INFO L180 QuantifierPusher]: treesize reduction 23, result has 88.0 percent of original size [2021-10-24 11:09:35,267 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-10-24 11:09:35,277 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:35,282 INFO L185 QuantifierPusher]: treesize reduction 6, result has 95.3 percent of original size 122 [2021-10-24 11:09:35,290 INFO L180 QuantifierPusher]: treesize reduction 6, result has 95.6 percent of original size [2021-10-24 11:09:35,294 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-10-24 11:09:35,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:35,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:35,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:35,388 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:35,393 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:09:35,397 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:35,402 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 223 [2021-10-24 11:09:35,420 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 347 [2021-10-24 11:09:35,428 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:35,443 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 435 [2021-10-24 11:09:35,453 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:35,463 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 440 [2021-10-24 11:09:35,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:35,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:35,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:35,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:35,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:35,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:35,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:35,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:35,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:35,585 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-10-24 11:09:35,588 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-10-24 11:09:35,592 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:35,597 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-24 11:09:35,600 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:35,603 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-10-24 11:09:35,610 INFO L180 QuantifierPusher]: treesize reduction 34, result has 60.5 percent of original size [2021-10-24 11:09:35,613 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-10-24 11:09:35,622 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-10-24 11:09:35,625 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-10-24 11:09:35,632 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:35,639 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-24 11:09:35,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:35,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:35,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:35,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:35,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:35,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:35,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:35,693 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-24 11:09:36,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-24 11:09:36,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-24 11:09:36,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-24 11:09:36,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267580745] [2021-10-24 11:09:36,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-24 11:09:36,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:09:36,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-24 11:09:36,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-10-24 11:09:36,531 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:36,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:09:36,755 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2021-10-24 11:09:36,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-24 11:09:36,756 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 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 22 [2021-10-24 11:09:36,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:09:36,758 INFO L225 Difference]: With dead ends: 71 [2021-10-24 11:09:36,758 INFO L226 Difference]: Without dead ends: 67 [2021-10-24 11:09:36,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1106.7ms TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2021-10-24 11:09:36,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-24 11:09:36,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2021-10-24 11:09:36,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:36,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-10-24 11:09:36,772 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 22 [2021-10-24 11:09:36,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:09:36,772 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-10-24 11:09:36,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:36,773 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-10-24 11:09:36,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-24 11:09:36,774 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:09:36,774 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1] [2021-10-24 11:09:36,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-24 11:09:37,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-24 11:09:37,004 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:09:37,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:09:37,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1667839023, now seen corresponding path program 2 times [2021-10-24 11:09:37,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:09:37,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840733711] [2021-10-24 11:09:37,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:09:37,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:09:37,018 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-24 11:09:37,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1860748307] [2021-10-24 11:09:37,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 11:09:37,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:09:37,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:09:37,021 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:09:37,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-24 11:09:37,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-24 11:09:37,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:09:37,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-24 11:09:37,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:09:37,613 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:37,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:09:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:38,688 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:09:38,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840733711] [2021-10-24 11:09:38,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-24 11:09:38,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860748307] [2021-10-24 11:09:38,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860748307] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:09:38,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [659100131] [2021-10-24 11:09:38,692 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-24 11:09:38,693 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 11:09:38,693 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 11:09:38,693 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 11:09:38,693 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 11:09:38,706 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:38,707 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:09:38,707 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:38,708 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-24 11:09:38,708 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:09:38,709 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:38,709 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 11:09:38,711 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-10-24 11:09:38,716 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_12|], 21=[|v_#valid_13|]} [2021-10-24 11:09:38,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:38,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:38,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:38,732 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 [2021-10-24 11:09:38,733 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:38,734 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 11:09:38,734 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:38,735 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 11:09:38,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 11:09:38,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:38,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:38,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:38,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:38,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:38,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:38,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:38,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:38,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:38,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:38,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:38,793 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 [2021-10-24 11:09:38,794 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:38,797 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 11:09:38,797 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:38,798 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 11:09:38,798 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 11:09:38,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:38,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:38,806 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:38,808 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-10-24 11:09:38,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-24 11:09:38,809 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:136, output treesize:111 [2021-10-24 11:09:38,813 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:38,815 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-10-24 11:09:38,820 INFO L180 QuantifierPusher]: treesize reduction 23, result has 88.0 percent of original size [2021-10-24 11:09:38,823 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 164 [2021-10-24 11:09:38,828 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:38,833 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 235 [2021-10-24 11:09:38,837 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:38,840 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-10-24 11:09:38,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:38,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:38,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:38,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:38,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:38,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:38,883 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:38,889 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-10-24 11:09:38,894 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:38,899 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 248 [2021-10-24 11:09:38,903 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:38,907 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 253 [2021-10-24 11:09:38,912 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:38,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:38,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:38,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:38,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:38,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:38,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:38,948 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-10-24 11:09:38,951 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-10-24 11:09:38,954 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:38,958 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-24 11:09:38,961 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:38,964 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-10-24 11:09:38,971 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-10-24 11:09:38,974 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-10-24 11:09:38,981 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:38,986 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 106 [2021-10-24 11:09:38,993 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:38,997 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-24 11:09:38,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:39,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:39,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:39,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:39,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:39,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:39,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:39,037 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-24 11:09:40,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-24 11:09:40,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-24 11:09:40,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-24 11:09:40,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466790614] [2021-10-24 11:09:40,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-24 11:09:40,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:09:40,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-24 11:09:40,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-10-24 11:09:40,121 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:42,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:09:42,491 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-10-24 11:09:42,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-24 11:09:42,492 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 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 24 [2021-10-24 11:09:42,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:09:42,493 INFO L225 Difference]: With dead ends: 53 [2021-10-24 11:09:42,494 INFO L226 Difference]: Without dead ends: 47 [2021-10-24 11:09:42,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 3204.8ms TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2021-10-24 11:09:42,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-24 11:09:42,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-10-24 11:09:42,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 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) [2021-10-24 11:09:42,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-10-24 11:09:42,522 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 24 [2021-10-24 11:09:42,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:09:42,523 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-10-24 11:09:42,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:42,523 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-10-24 11:09:42,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-24 11:09:42,525 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:09:42,526 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1] [2021-10-24 11:09:42,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-24 11:09:42,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:09:42,751 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:09:42,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:09:42,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1490352846, now seen corresponding path program 3 times [2021-10-24 11:09:42,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:09:42,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171660076] [2021-10-24 11:09:42,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:09:42,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:09:42,775 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-24 11:09:42,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596119718] [2021-10-24 11:09:42,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 11:09:42,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:09:42,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:09:42,777 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:09:42,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-24 11:09:44,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 11:09:44,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-24 11:09:44,492 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-24 11:09:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 11:09:44,606 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-24 11:09:44,606 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-24 11:09:44,607 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:09:44,609 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:09:44,610 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:09:44,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-24 11:09:44,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-10-24 11:09:44,825 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 11:09:44,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:09:44 BoogieIcfgContainer [2021-10-24 11:09:44,892 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 11:09:44,892 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 11:09:44,892 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 11:09:44,893 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 11:09:44,893 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:07:58" (3/4) ... [2021-10-24 11:09:44,895 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-24 11:09:44,988 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 11:09:44,988 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 11:09:44,989 INFO L168 Benchmark]: Toolchain (without parser) took 107188.70 ms. Allocated memory was 96.5 MB in the beginning and 138.4 MB in the end (delta: 41.9 MB). Free memory was 60.7 MB in the beginning and 74.6 MB in the end (delta: -13.9 MB). Peak memory consumption was 29.0 MB. Max. memory is 16.1 GB. [2021-10-24 11:09:44,989 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 96.5 MB. Free memory is still 76.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:09:44,990 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.64 ms. Allocated memory was 96.5 MB in the beginning and 138.4 MB in the end (delta: 41.9 MB). Free memory was 60.4 MB in the beginning and 113.7 MB in the end (delta: -53.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-24 11:09:44,990 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.95 ms. Allocated memory is still 138.4 MB. Free memory was 113.7 MB in the beginning and 112.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:09:44,991 INFO L168 Benchmark]: Boogie Preprocessor took 23.75 ms. Allocated memory is still 138.4 MB. Free memory was 112.0 MB in the beginning and 111.2 MB in the end (delta: 810.0 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-24 11:09:44,992 INFO L168 Benchmark]: RCFGBuilder took 447.81 ms. Allocated memory is still 138.4 MB. Free memory was 111.2 MB in the beginning and 100.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-24 11:09:44,992 INFO L168 Benchmark]: TraceAbstraction took 106261.15 ms. Allocated memory is still 138.4 MB. Free memory was 99.9 MB in the beginning and 78.8 MB in the end (delta: 21.1 MB). Peak memory consumption was 23.3 MB. Max. memory is 16.1 GB. [2021-10-24 11:09:44,997 INFO L168 Benchmark]: Witness Printer took 95.85 ms. Allocated memory is still 138.4 MB. Free memory was 78.8 MB in the beginning and 74.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-24 11:09:45,001 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 96.5 MB. Free memory is still 76.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 316.64 ms. Allocated memory was 96.5 MB in the beginning and 138.4 MB in the end (delta: 41.9 MB). Free memory was 60.4 MB in the beginning and 113.7 MB in the end (delta: -53.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.95 ms. Allocated memory is still 138.4 MB. Free memory was 113.7 MB in the beginning and 112.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.75 ms. Allocated memory is still 138.4 MB. Free memory was 112.0 MB in the beginning and 111.2 MB in the end (delta: 810.0 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 447.81 ms. Allocated memory is still 138.4 MB. Free memory was 111.2 MB in the beginning and 100.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 106261.15 ms. Allocated memory is still 138.4 MB. Free memory was 99.9 MB in the beginning and 78.8 MB in the end (delta: 21.1 MB). Peak memory consumption was 23.3 MB. Max. memory is 16.1 GB. * Witness Printer took 95.85 ms. Allocated memory is still 138.4 MB. Free memory was 78.8 MB in the beginning and 74.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [counter=0] [L27] EXPR counter++ VAL [counter=1] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=1] [L27] EXPR counter++ VAL [counter=2] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=2] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=2] [L27] EXPR counter++ VAL [counter=3] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=3] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=3] [L27] EXPR counter++ VAL [counter=4] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=4] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=4] [L27] EXPR counter++ VAL [counter=5] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=5] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=5] [L27] EXPR counter++ VAL [counter=6] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=6] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=6] [L27] EXPR counter++ VAL [counter=7] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=7] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=7] [L27] EXPR counter++ VAL [counter=8] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=8] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=8] [L27] EXPR counter++ VAL [counter=9] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=9] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=9] [L27] EXPR counter++ VAL [counter=10] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=10] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=10] [L27] EXPR counter++ VAL [counter=11] [L27] COND FALSE !(counter++<10) [L10] COND TRUE !(cond) VAL [counter=11] [L12] reach_error() VAL [counter=11] - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 106098.2ms, OverallIterations: 6, TraceHistogramMax: 11, EmptinessCheckTime: 15.1ms, AutomataDifference: 48828.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 46 SDtfs, 148 SDslu, 204 SDs, 0 SdLazy, 239 SolverSat, 56 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1320.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 236 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 87410.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=4, InterpolantAutomatonStates: 66, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 76.4ms AutomataMinimizationTime, 5 MinimizatonAttempts, 28 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 48.0ms SsaConstructionTime, 2264.3ms SatisfiabilityAnalysisTime, 46312.5ms InterpolantComputationTime, 119 NumberOfCodeBlocks, 119 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 136 ConstructedInterpolants, 20 QuantifiedInterpolants, 1392 SizeOfPredicates, 21 NumberOfNonLiveVariables, 447 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 0/156 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-24 11:09:45,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771b689d-3b50-4a0c-8d1e-1763a50c0e81/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...