./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/insertion_sort-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/insertion_sort-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 295b17c4ca5a4afcf4a0f36e9026f57ef5bd93d017747132380452b1ff4662bd .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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-b2eff8b [2021-10-29 00:01:38,219 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 00:01:38,222 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 00:01:38,265 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 00:01:38,266 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 00:01:38,267 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 00:01:38,269 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 00:01:38,272 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 00:01:38,274 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 00:01:38,275 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 00:01:38,276 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 00:01:38,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 00:01:38,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 00:01:38,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 00:01:38,281 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 00:01:38,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 00:01:38,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 00:01:38,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 00:01:38,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 00:01:38,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 00:01:38,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 00:01:38,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 00:01:38,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 00:01:38,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 00:01:38,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 00:01:38,300 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 00:01:38,300 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 00:01:38,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 00:01:38,302 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 00:01:38,303 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 00:01:38,304 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 00:01:38,305 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 00:01:38,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 00:01:38,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 00:01:38,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 00:01:38,309 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 00:01:38,310 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 00:01:38,310 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 00:01:38,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 00:01:38,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 00:01:38,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 00:01:38,314 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-29 00:01:38,339 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 00:01:38,339 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 00:01:38,340 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-29 00:01:38,340 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-29 00:01:38,341 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-29 00:01:38,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-29 00:01:38,342 INFO L138 SettingsManager]: * Use SBE=true [2021-10-29 00:01:38,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 00:01:38,342 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 00:01:38,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 00:01:38,343 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 00:01:38,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 00:01:38,343 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 00:01:38,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 00:01:38,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 00:01:38,350 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 00:01:38,350 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 00:01:38,350 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 00:01:38,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 00:01:38,351 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 00:01:38,351 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-29 00:01:38,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 00:01:38,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 00:01:38,352 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 00:01:38,352 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 00:01:38,352 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 00:01:38,352 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-29 00:01:38,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 00:01:38,353 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-29 00:01:38,353 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-29 00:01:38,353 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 00:01:38,353 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 00:01:38,354 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 295b17c4ca5a4afcf4a0f36e9026f57ef5bd93d017747132380452b1ff4662bd [2021-10-29 00:01:38,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 00:01:38,629 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 00:01:38,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 00:01:38,634 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 00:01:38,635 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 00:01:38,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/loops/insertion_sort-1.c [2021-10-29 00:01:38,712 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/data/7a3fbb06f/81790a51d74541e38fad7df187dadd5f/FLAG548e745ec [2021-10-29 00:01:39,168 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 00:01:39,169 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/sv-benchmarks/c/loops/insertion_sort-1.c [2021-10-29 00:01:39,180 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/data/7a3fbb06f/81790a51d74541e38fad7df187dadd5f/FLAG548e745ec [2021-10-29 00:01:39,571 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/data/7a3fbb06f/81790a51d74541e38fad7df187dadd5f [2021-10-29 00:01:39,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 00:01:39,589 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 00:01:39,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 00:01:39,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 00:01:39,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 00:01:39,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 12:01:39" (1/1) ... [2021-10-29 00:01:39,612 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@417e84c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:39, skipping insertion in model container [2021-10-29 00:01:39,616 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 12:01:39" (1/1) ... [2021-10-29 00:01:39,625 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 00:01:39,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 00:01:39,983 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_14ee45f3-c002-45eb-bafc-80824074e644/sv-benchmarks/c/loops/insertion_sort-1.c[328,341] [2021-10-29 00:01:40,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 00:01:40,009 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 00:01:40,026 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_14ee45f3-c002-45eb-bafc-80824074e644/sv-benchmarks/c/loops/insertion_sort-1.c[328,341] [2021-10-29 00:01:40,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 00:01:40,062 INFO L208 MainTranslator]: Completed translation [2021-10-29 00:01:40,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:40 WrapperNode [2021-10-29 00:01:40,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 00:01:40,064 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 00:01:40,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 00:01:40,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 00:01:40,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:40" (1/1) ... [2021-10-29 00:01:40,077 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:40" (1/1) ... [2021-10-29 00:01:40,099 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 00:01:40,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 00:01:40,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 00:01:40,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 00:01:40,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:40" (1/1) ... [2021-10-29 00:01:40,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:40" (1/1) ... [2021-10-29 00:01:40,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:40" (1/1) ... [2021-10-29 00:01:40,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:40" (1/1) ... [2021-10-29 00:01:40,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:40" (1/1) ... [2021-10-29 00:01:40,121 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:40" (1/1) ... [2021-10-29 00:01:40,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:40" (1/1) ... [2021-10-29 00:01:40,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 00:01:40,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 00:01:40,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 00:01:40,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 00:01:40,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:40" (1/1) ... [2021-10-29 00:01:40,136 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 00:01:40,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:40,158 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:40,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 00:01:40,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 00:01:40,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 00:01:40,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-29 00:01:40,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 00:01:40,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 00:01:40,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-29 00:01:40,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-29 00:01:40,554 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 00:01:40,570 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-29 00:01:40,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:01:40 BoogieIcfgContainer [2021-10-29 00:01:40,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 00:01:40,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 00:01:40,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 00:01:40,579 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 00:01:40,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 12:01:39" (1/3) ... [2021-10-29 00:01:40,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b96fde3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 12:01:40, skipping insertion in model container [2021-10-29 00:01:40,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:40" (2/3) ... [2021-10-29 00:01:40,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b96fde3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 12:01:40, skipping insertion in model container [2021-10-29 00:01:40,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:01:40" (3/3) ... [2021-10-29 00:01:40,583 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-1.c [2021-10-29 00:01:40,588 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 00:01:40,588 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-29 00:01:40,637 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 00:01:40,644 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=PETRI_NET, 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 [2021-10-29 00:01:40,644 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-29 00:01:40,669 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:01:40,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-29 00:01:40,679 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:01:40,680 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:01:40,681 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:01:40,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:40,691 INFO L85 PathProgramCache]: Analyzing trace with hash -2015618667, now seen corresponding path program 1 times [2021-10-29 00:01:40,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:40,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775284226] [2021-10-29 00:01:40,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:40,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:40,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:41,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:01:41,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:01:41,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775284226] [2021-10-29 00:01:41,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775284226] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 00:01:41,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 00:01:41,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-29 00:01:41,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632967137] [2021-10-29 00:01:41,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 00:01:41,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:01:41,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 00:01:41,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-29 00:01:41,063 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:01:41,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:01:41,138 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2021-10-29 00:01:41,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 00:01:41,139 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-29 00:01:41,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:01:41,146 INFO L225 Difference]: With dead ends: 54 [2021-10-29 00:01:41,146 INFO L226 Difference]: Without dead ends: 22 [2021-10-29 00:01:41,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-29 00:01:41,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-29 00:01:41,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-10-29 00:01:41,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 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) [2021-10-29 00:01:41,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-10-29 00:01:41,180 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 9 [2021-10-29 00:01:41,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:01:41,180 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-10-29 00:01:41,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:01:41,181 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-10-29 00:01:41,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-29 00:01:41,182 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:01:41,182 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:01:41,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 00:01:41,183 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:01:41,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:41,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1565476563, now seen corresponding path program 1 times [2021-10-29 00:01:41,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:41,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044888806] [2021-10-29 00:01:41,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:41,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:41,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:41,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:01:41,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:01:41,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044888806] [2021-10-29 00:01:41,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044888806] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:41,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031553520] [2021-10-29 00:01:41,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:41,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:41,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:41,431 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:01:41,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-29 00:01:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:41,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-29 00:01:41,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:41,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 00:01:41,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031553520] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 00:01:41,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-29 00:01:41,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2021-10-29 00:01:41,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032035624] [2021-10-29 00:01:41,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 00:01:41,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:01:41,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 00:01:41,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-29 00:01:41,655 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-10-29 00:01:41,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:01:41,736 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-10-29 00:01:41,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 00:01:41,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 11 [2021-10-29 00:01:41,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:01:41,740 INFO L225 Difference]: With dead ends: 37 [2021-10-29 00:01:41,740 INFO L226 Difference]: Without dead ends: 29 [2021-10-29 00:01:41,741 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-29 00:01:41,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-29 00:01:41,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2021-10-29 00:01:41,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:01:41,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-10-29 00:01:41,749 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 11 [2021-10-29 00:01:41,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:01:41,750 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-10-29 00:01:41,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-10-29 00:01:41,751 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-10-29 00:01:41,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-29 00:01:41,755 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:01:41,756 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:01:41,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:41,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:41,963 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:01:41,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:41,964 INFO L85 PathProgramCache]: Analyzing trace with hash 188510022, now seen corresponding path program 1 times [2021-10-29 00:01:41,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:41,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81596729] [2021-10-29 00:01:41,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:41,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:42,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:01:42,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:01:42,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81596729] [2021-10-29 00:01:42,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81596729] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:42,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114003112] [2021-10-29 00:01:42,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:42,183 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:42,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:42,184 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:01:42,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-29 00:01:42,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:42,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-29 00:01:42,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:01:42,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114003112] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:42,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:01:42,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-10-29 00:01:42,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567955204] [2021-10-29 00:01:42,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-29 00:01:42,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:01:42,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-29 00:01:42,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-29 00:01:42,356 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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) [2021-10-29 00:01:42,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:01:42,486 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2021-10-29 00:01:42,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-29 00:01:42,487 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-29 00:01:42,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:01:42,488 INFO L225 Difference]: With dead ends: 49 [2021-10-29 00:01:42,488 INFO L226 Difference]: Without dead ends: 32 [2021-10-29 00:01:42,489 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-29 00:01:42,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-29 00:01:42,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2021-10-29 00:01:42,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 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) [2021-10-29 00:01:42,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-10-29 00:01:42,493 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 17 [2021-10-29 00:01:42,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:01:42,494 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-10-29 00:01:42,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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) [2021-10-29 00:01:42,494 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-10-29 00:01:42,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-29 00:01:42,495 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:01:42,495 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:01:42,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:42,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:42,715 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:01:42,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:42,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1379565948, now seen corresponding path program 2 times [2021-10-29 00:01:42,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:42,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107411332] [2021-10-29 00:01:42,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:42,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:43,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:01:43,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:01:43,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107411332] [2021-10-29 00:01:43,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107411332] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:43,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671646840] [2021-10-29 00:01:43,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-29 00:01:43,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:43,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:43,325 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:01:43,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-29 00:01:43,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-29 00:01:43,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:01:43,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-29 00:01:43,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:43,683 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-29 00:01:43,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-10-29 00:01:43,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 00:01:43,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-10-29 00:01:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-29 00:01:43,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671646840] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:43,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:01:43,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2021-10-29 00:01:43,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503229110] [2021-10-29 00:01:43,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-29 00:01:43,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:01:43,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-29 00:01:43,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-10-29 00:01:43,850 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 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) [2021-10-29 00:01:44,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:01:44,427 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2021-10-29 00:01:44,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-29 00:01:44,427 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 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 19 [2021-10-29 00:01:44,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:01:44,429 INFO L225 Difference]: With dead ends: 75 [2021-10-29 00:01:44,429 INFO L226 Difference]: Without dead ends: 60 [2021-10-29 00:01:44,430 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=209, Invalid=721, Unknown=0, NotChecked=0, Total=930 [2021-10-29 00:01:44,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-29 00:01:44,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 38. [2021-10-29 00:01:44,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 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) [2021-10-29 00:01:44,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-10-29 00:01:44,437 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 19 [2021-10-29 00:01:44,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:01:44,437 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-10-29 00:01:44,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 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) [2021-10-29 00:01:44,438 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-10-29 00:01:44,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-29 00:01:44,439 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:01:44,439 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:01:44,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:44,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:44,640 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:01:44,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:44,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1125897754, now seen corresponding path program 1 times [2021-10-29 00:01:44,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:44,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597882254] [2021-10-29 00:01:44,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:44,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:44,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 00:01:44,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:01:44,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597882254] [2021-10-29 00:01:44,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597882254] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:44,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112451718] [2021-10-29 00:01:44,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:44,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:44,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:44,779 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:01:44,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-29 00:01:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:44,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-29 00:01:44,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:45,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 00:01:45,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112451718] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:45,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:01:45,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-10-29 00:01:45,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155491592] [2021-10-29 00:01:45,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-29 00:01:45,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:01:45,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-29 00:01:45,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-29 00:01:45,079 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:01:45,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:01:45,227 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2021-10-29 00:01:45,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-29 00:01:45,227 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-29 00:01:45,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:01:45,230 INFO L225 Difference]: With dead ends: 90 [2021-10-29 00:01:45,231 INFO L226 Difference]: Without dead ends: 66 [2021-10-29 00:01:45,231 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-29 00:01:45,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-29 00:01:45,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2021-10-29 00:01:45,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 55 states have internal predecessors, (68), 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) [2021-10-29 00:01:45,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2021-10-29 00:01:45,239 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 23 [2021-10-29 00:01:45,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:01:45,240 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2021-10-29 00:01:45,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:01:45,240 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2021-10-29 00:01:45,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-29 00:01:45,241 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:01:45,241 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:01:45,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:45,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:45,442 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:01:45,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:45,442 INFO L85 PathProgramCache]: Analyzing trace with hash -210329187, now seen corresponding path program 1 times [2021-10-29 00:01:45,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:45,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536240630] [2021-10-29 00:01:45,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:45,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:01:45,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:01:45,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536240630] [2021-10-29 00:01:45,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536240630] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:45,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776047372] [2021-10-29 00:01:45,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:45,927 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:45,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:45,930 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:01:45,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-29 00:01:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:46,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-29 00:01:46,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:46,230 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-29 00:01:46,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-29 00:01:46,557 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-10-29 00:01:46,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 42 [2021-10-29 00:01:46,827 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-10-29 00:01:46,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 45 [2021-10-29 00:01:46,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-29 00:01:46,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776047372] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:46,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:01:46,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-10-29 00:01:46,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69021227] [2021-10-29 00:01:46,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-29 00:01:46,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:01:46,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-29 00:01:46,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-10-29 00:01:46,868 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:01:48,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:01:48,240 INFO L93 Difference]: Finished difference Result 153 states and 192 transitions. [2021-10-29 00:01:48,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-29 00:01:48,240 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-29 00:01:48,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:01:48,243 INFO L225 Difference]: With dead ends: 153 [2021-10-29 00:01:48,243 INFO L226 Difference]: Without dead ends: 98 [2021-10-29 00:01:48,245 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=423, Invalid=2333, Unknown=0, NotChecked=0, Total=2756 [2021-10-29 00:01:48,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-29 00:01:48,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 54. [2021-10-29 00:01:48,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 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) [2021-10-29 00:01:48,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-10-29 00:01:48,256 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 24 [2021-10-29 00:01:48,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:01:48,256 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-10-29 00:01:48,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:01:48,256 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-10-29 00:01:48,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-29 00:01:48,257 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:01:48,258 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:01:48,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:48,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:48,483 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:01:48,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:48,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1447473291, now seen corresponding path program 3 times [2021-10-29 00:01:48,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:48,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774836255] [2021-10-29 00:01:48,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:48,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:01:49,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:01:49,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774836255] [2021-10-29 00:01:49,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774836255] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:49,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964935836] [2021-10-29 00:01:49,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-29 00:01:49,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:49,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:49,081 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:01:49,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-29 00:01:49,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-29 00:01:49,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:01:49,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-29 00:01:49,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:49,518 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-29 00:01:49,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-10-29 00:01:49,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:01:49,735 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-10-29 00:01:49,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-10-29 00:01:49,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 00:01:49,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-10-29 00:01:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-29 00:01:49,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964935836] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:49,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:01:49,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-10-29 00:01:49,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462814541] [2021-10-29 00:01:49,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-29 00:01:49,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:01:49,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-29 00:01:49,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-10-29 00:01:49,831 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:01:50,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:01:50,481 INFO L93 Difference]: Finished difference Result 167 states and 209 transitions. [2021-10-29 00:01:50,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-29 00:01:50,481 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-29 00:01:50,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:01:50,483 INFO L225 Difference]: With dead ends: 167 [2021-10-29 00:01:50,483 INFO L226 Difference]: Without dead ends: 135 [2021-10-29 00:01:50,484 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=297, Invalid=1263, Unknown=0, NotChecked=0, Total=1560 [2021-10-29 00:01:50,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-29 00:01:50,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 67. [2021-10-29 00:01:50,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 66 states have internal predecessors, (80), 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) [2021-10-29 00:01:50,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2021-10-29 00:01:50,496 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 27 [2021-10-29 00:01:50,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:01:50,496 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2021-10-29 00:01:50,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:01:50,496 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2021-10-29 00:01:50,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-29 00:01:50,501 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:01:50,501 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:01:50,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:50,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-29 00:01:50,702 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:01:50,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:50,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1913928053, now seen corresponding path program 2 times [2021-10-29 00:01:50,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:50,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321299194] [2021-10-29 00:01:50,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:50,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:01:51,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:01:51,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321299194] [2021-10-29 00:01:51,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321299194] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:51,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277115967] [2021-10-29 00:01:51,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-29 00:01:51,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:51,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:51,139 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:01:51,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-29 00:01:51,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-29 00:01:51,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:01:51,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-29 00:01:51,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:51,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-29 00:01:51,559 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-29 00:01:51,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-10-29 00:01:51,689 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-29 00:01:51,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 28 [2021-10-29 00:01:51,718 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-29 00:01:51,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277115967] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:51,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:01:51,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 21 [2021-10-29 00:01:51,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862563678] [2021-10-29 00:01:51,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-29 00:01:51,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:01:51,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-29 00:01:51,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-10-29 00:01:51,721 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:01:52,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:01:52,269 INFO L93 Difference]: Finished difference Result 180 states and 225 transitions. [2021-10-29 00:01:52,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-29 00:01:52,270 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-29 00:01:52,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:01:52,271 INFO L225 Difference]: With dead ends: 180 [2021-10-29 00:01:52,271 INFO L226 Difference]: Without dead ends: 148 [2021-10-29 00:01:52,272 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-10-29 00:01:52,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-29 00:01:52,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 85. [2021-10-29 00:01:52,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2380952380952381) internal successors, (104), 84 states have internal predecessors, (104), 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) [2021-10-29 00:01:52,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2021-10-29 00:01:52,286 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 31 [2021-10-29 00:01:52,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:01:52,286 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2021-10-29 00:01:52,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:01:52,287 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2021-10-29 00:01:52,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-29 00:01:52,288 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:01:52,288 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:01:52,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:52,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-29 00:01:52,503 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:01:52,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:52,503 INFO L85 PathProgramCache]: Analyzing trace with hash -635707062, now seen corresponding path program 1 times [2021-10-29 00:01:52,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:52,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801313331] [2021-10-29 00:01:52,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:52,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:52,839 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 00:01:52,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:01:52,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801313331] [2021-10-29 00:01:52,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801313331] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:52,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223393118] [2021-10-29 00:01:52,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:52,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:52,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:52,841 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:01:52,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-29 00:01:53,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:53,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-29 00:01:53,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:53,341 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-29 00:01:53,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-10-29 00:01:53,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 00:01:53,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-10-29 00:01:53,461 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-29 00:01:53,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223393118] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:53,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:01:53,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-10-29 00:01:53,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741539597] [2021-10-29 00:01:53,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-29 00:01:53,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:01:53,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-29 00:01:53,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-10-29 00:01:53,468 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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) [2021-10-29 00:01:54,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:01:54,607 INFO L93 Difference]: Finished difference Result 237 states and 294 transitions. [2021-10-29 00:01:54,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-10-29 00:01:54,608 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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 32 [2021-10-29 00:01:54,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:01:54,610 INFO L225 Difference]: With dead ends: 237 [2021-10-29 00:01:54,610 INFO L226 Difference]: Without dead ends: 205 [2021-10-29 00:01:54,612 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=542, Invalid=2764, Unknown=0, NotChecked=0, Total=3306 [2021-10-29 00:01:54,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-10-29 00:01:54,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 97. [2021-10-29 00:01:54,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.2291666666666667) internal successors, (118), 96 states have internal predecessors, (118), 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) [2021-10-29 00:01:54,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2021-10-29 00:01:54,626 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 32 [2021-10-29 00:01:54,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:01:54,626 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2021-10-29 00:01:54,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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) [2021-10-29 00:01:54,626 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2021-10-29 00:01:54,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-29 00:01:54,628 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:01:54,628 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:01:54,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:54,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:54,847 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:01:54,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:54,847 INFO L85 PathProgramCache]: Analyzing trace with hash 222375954, now seen corresponding path program 2 times [2021-10-29 00:01:54,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:54,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164878736] [2021-10-29 00:01:54,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:54,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:54,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:55,383 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:01:55,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:01:55,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164878736] [2021-10-29 00:01:55,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164878736] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:55,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577089825] [2021-10-29 00:01:55,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-29 00:01:55,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:55,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:55,387 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:01:55,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-29 00:01:55,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-29 00:01:55,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:01:55,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-29 00:01:55,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:55,773 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-29 00:01:55,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-29 00:01:56,032 INFO L354 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2021-10-29 00:01:56,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 38 [2021-10-29 00:01:56,284 INFO L354 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2021-10-29 00:01:56,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 48 [2021-10-29 00:01:56,450 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-10-29 00:01:56,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 39 [2021-10-29 00:01:56,480 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-29 00:01:56,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577089825] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:56,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:01:56,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-10-29 00:01:56,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428576493] [2021-10-29 00:01:56,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-29 00:01:56,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:01:56,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-29 00:01:56,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2021-10-29 00:01:56,483 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 34 states have internal predecessors, (58), 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) [2021-10-29 00:01:57,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:01:57,612 INFO L93 Difference]: Finished difference Result 181 states and 222 transitions. [2021-10-29 00:01:57,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-29 00:01:57,612 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 34 states have internal predecessors, (58), 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 32 [2021-10-29 00:01:57,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:01:57,614 INFO L225 Difference]: With dead ends: 181 [2021-10-29 00:01:57,614 INFO L226 Difference]: Without dead ends: 179 [2021-10-29 00:01:57,615 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=367, Invalid=2285, Unknown=0, NotChecked=0, Total=2652 [2021-10-29 00:01:57,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-10-29 00:01:57,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 101. [2021-10-29 00:01:57,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.25) internal successors, (125), 100 states have internal predecessors, (125), 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) [2021-10-29 00:01:57,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 125 transitions. [2021-10-29 00:01:57,631 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 125 transitions. Word has length 32 [2021-10-29 00:01:57,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:01:57,632 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 125 transitions. [2021-10-29 00:01:57,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 34 states have internal predecessors, (58), 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) [2021-10-29 00:01:57,632 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 125 transitions. [2021-10-29 00:01:57,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-29 00:01:57,634 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:01:57,634 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:01:57,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:57,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-29 00:01:57,859 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:01:57,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:57,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1757363551, now seen corresponding path program 3 times [2021-10-29 00:01:57,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:57,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225585726] [2021-10-29 00:01:57,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:57,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-29 00:01:58,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:01:58,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225585726] [2021-10-29 00:01:58,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225585726] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:58,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608945054] [2021-10-29 00:01:58,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-29 00:01:58,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:58,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:58,033 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:01:58,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-29 00:01:58,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-29 00:01:58,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:01:58,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-29 00:01:58,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:58,632 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-29 00:01:58,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608945054] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:58,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:01:58,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-10-29 00:01:58,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965741458] [2021-10-29 00:01:58,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-29 00:01:58,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:01:58,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-29 00:01:58,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-29 00:01:58,635 INFO L87 Difference]: Start difference. First operand 101 states and 125 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 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) [2021-10-29 00:01:58,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:01:58,832 INFO L93 Difference]: Finished difference Result 290 states and 364 transitions. [2021-10-29 00:01:58,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-29 00:01:58,835 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 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) Word has length 35 [2021-10-29 00:01:58,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:01:58,836 INFO L225 Difference]: With dead ends: 290 [2021-10-29 00:01:58,836 INFO L226 Difference]: Without dead ends: 224 [2021-10-29 00:01:58,840 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-10-29 00:01:58,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-10-29 00:01:58,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 182. [2021-10-29 00:01:58,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.2154696132596685) internal successors, (220), 181 states have internal predecessors, (220), 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) [2021-10-29 00:01:58,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 220 transitions. [2021-10-29 00:01:58,877 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 220 transitions. Word has length 35 [2021-10-29 00:01:58,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:01:58,878 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 220 transitions. [2021-10-29 00:01:58,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 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) [2021-10-29 00:01:58,878 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 220 transitions. [2021-10-29 00:01:58,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-29 00:01:58,884 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:01:58,884 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:01:58,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:59,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:59,103 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:01:59,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:59,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1000905248, now seen corresponding path program 1 times [2021-10-29 00:01:59,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:59,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442860835] [2021-10-29 00:01:59,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:59,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:01:59,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:01:59,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442860835] [2021-10-29 00:01:59,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442860835] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:59,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851771591] [2021-10-29 00:01:59,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:59,439 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:59,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:59,445 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:01:59,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-29 00:01:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:59,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-29 00:01:59,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:59,930 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-29 00:01:59,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-29 00:02:00,261 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-10-29 00:02:00,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 42 [2021-10-29 00:02:00,402 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-29 00:02:00,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 30 [2021-10-29 00:02:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-29 00:02:00,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851771591] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:00,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:02:00,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 26 [2021-10-29 00:02:00,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155104455] [2021-10-29 00:02:00,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-29 00:02:00,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:02:00,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-29 00:02:00,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-10-29 00:02:00,443 INFO L87 Difference]: Start difference. First operand 182 states and 220 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 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) [2021-10-29 00:02:01,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:02:01,818 INFO L93 Difference]: Finished difference Result 330 states and 397 transitions. [2021-10-29 00:02:01,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-29 00:02:01,821 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 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) Word has length 36 [2021-10-29 00:02:01,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:02:01,823 INFO L225 Difference]: With dead ends: 330 [2021-10-29 00:02:01,823 INFO L226 Difference]: Without dead ends: 248 [2021-10-29 00:02:01,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=510, Invalid=2460, Unknown=0, NotChecked=0, Total=2970 [2021-10-29 00:02:01,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-10-29 00:02:01,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 183. [2021-10-29 00:02:01,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.2087912087912087) internal successors, (220), 182 states have internal predecessors, (220), 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) [2021-10-29 00:02:01,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 220 transitions. [2021-10-29 00:02:01,848 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 220 transitions. Word has length 36 [2021-10-29 00:02:01,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:02:01,849 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 220 transitions. [2021-10-29 00:02:01,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 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) [2021-10-29 00:02:01,849 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 220 transitions. [2021-10-29 00:02:01,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-29 00:02:01,850 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:02:01,850 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:02:01,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-29 00:02:02,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:02:02,071 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:02:02,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:02:02,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1716712809, now seen corresponding path program 3 times [2021-10-29 00:02:02,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:02:02,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596755296] [2021-10-29 00:02:02,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:02:02,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:02:02,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:02:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 00:02:02,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:02:02,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596755296] [2021-10-29 00:02:02,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596755296] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:02,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101260280] [2021-10-29 00:02:02,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-29 00:02:02,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:02:02,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:02:02,607 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:02:02,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-29 00:02:02,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-29 00:02:02,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:02:02,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-29 00:02:02,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:02:03,138 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-29 00:02:03,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-29 00:02:03,351 INFO L354 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2021-10-29 00:02:03,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 39 [2021-10-29 00:02:03,524 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-10-29 00:02:03,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 42 [2021-10-29 00:02:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-29 00:02:03,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101260280] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:03,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:02:03,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2021-10-29 00:02:03,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407144439] [2021-10-29 00:02:03,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-29 00:02:03,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:02:03,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-29 00:02:03,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-10-29 00:02:03,569 INFO L87 Difference]: Start difference. First operand 183 states and 220 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 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) [2021-10-29 00:02:06,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:02:06,010 INFO L93 Difference]: Finished difference Result 329 states and 395 transitions. [2021-10-29 00:02:06,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-10-29 00:02:06,010 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 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 37 [2021-10-29 00:02:06,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:02:06,012 INFO L225 Difference]: With dead ends: 329 [2021-10-29 00:02:06,012 INFO L226 Difference]: Without dead ends: 223 [2021-10-29 00:02:06,014 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=905, Invalid=6405, Unknown=0, NotChecked=0, Total=7310 [2021-10-29 00:02:06,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-10-29 00:02:06,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 149. [2021-10-29 00:02:06,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.1824324324324325) internal successors, (175), 148 states have internal predecessors, (175), 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) [2021-10-29 00:02:06,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 175 transitions. [2021-10-29 00:02:06,032 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 175 transitions. Word has length 37 [2021-10-29 00:02:06,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:02:06,042 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 175 transitions. [2021-10-29 00:02:06,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 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) [2021-10-29 00:02:06,042 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 175 transitions. [2021-10-29 00:02:06,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-29 00:02:06,043 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:02:06,043 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:02:06,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-29 00:02:06,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-29 00:02:06,245 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:02:06,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:02:06,245 INFO L85 PathProgramCache]: Analyzing trace with hash -336019396, now seen corresponding path program 4 times [2021-10-29 00:02:06,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:02:06,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244790818] [2021-10-29 00:02:06,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:02:06,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:02:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:02:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 00:02:06,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:02:06,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244790818] [2021-10-29 00:02:06,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244790818] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:06,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226127297] [2021-10-29 00:02:06,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-29 00:02:06,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:02:06,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:02:06,503 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:02:06,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-29 00:02:06,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-29 00:02:06,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:02:06,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-29 00:02:06,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:02:06,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-29 00:02:07,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:07,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-10-29 00:02:07,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:07,250 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-10-29 00:02:07,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-10-29 00:02:07,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 00:02:07,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-10-29 00:02:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-29 00:02:07,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226127297] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:07,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:02:07,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-10-29 00:02:07,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935044861] [2021-10-29 00:02:07,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-29 00:02:07,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:02:07,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-29 00:02:07,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-10-29 00:02:07,464 INFO L87 Difference]: Start difference. First operand 149 states and 175 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 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) [2021-10-29 00:02:08,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:02:08,039 INFO L93 Difference]: Finished difference Result 223 states and 266 transitions. [2021-10-29 00:02:08,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-29 00:02:08,040 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 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 39 [2021-10-29 00:02:08,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:02:08,042 INFO L225 Difference]: With dead ends: 223 [2021-10-29 00:02:08,042 INFO L226 Difference]: Without dead ends: 178 [2021-10-29 00:02:08,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-10-29 00:02:08,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-10-29 00:02:08,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 150. [2021-10-29 00:02:08,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.174496644295302) internal successors, (175), 149 states have internal predecessors, (175), 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) [2021-10-29 00:02:08,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 175 transitions. [2021-10-29 00:02:08,061 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 175 transitions. Word has length 39 [2021-10-29 00:02:08,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:02:08,061 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 175 transitions. [2021-10-29 00:02:08,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 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) [2021-10-29 00:02:08,062 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 175 transitions. [2021-10-29 00:02:08,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-29 00:02:08,063 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:02:08,063 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:02:08,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-29 00:02:08,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-29 00:02:08,271 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:02:08,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:02:08,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1292986487, now seen corresponding path program 1 times [2021-10-29 00:02:08,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:02:08,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991173333] [2021-10-29 00:02:08,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:02:08,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:02:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:02:09,386 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:02:09,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:02:09,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991173333] [2021-10-29 00:02:09,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991173333] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:09,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98713353] [2021-10-29 00:02:09,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:02:09,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:02:09,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:02:09,391 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:02:09,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-29 00:02:09,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:02:09,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-29 00:02:09,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:02:09,952 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-29 00:02:09,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-10-29 00:02:10,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:10,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:10,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:10,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 00:02:10,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-10-29 00:02:10,525 INFO L354 Elim1Store]: treesize reduction 80, result has 20.0 percent of original size [2021-10-29 00:02:10,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-10-29 00:02:10,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 00:02:10,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-10-29 00:02:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-29 00:02:10,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98713353] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:10,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:02:10,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 29 [2021-10-29 00:02:10,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030926550] [2021-10-29 00:02:10,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-29 00:02:10,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:02:10,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-29 00:02:10,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-10-29 00:02:10,658 INFO L87 Difference]: Start difference. First operand 150 states and 175 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 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) [2021-10-29 00:02:12,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:02:12,372 INFO L93 Difference]: Finished difference Result 325 states and 387 transitions. [2021-10-29 00:02:12,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-29 00:02:12,372 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 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 40 [2021-10-29 00:02:12,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:02:12,374 INFO L225 Difference]: With dead ends: 325 [2021-10-29 00:02:12,375 INFO L226 Difference]: Without dead ends: 280 [2021-10-29 00:02:12,376 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=647, Invalid=2893, Unknown=0, NotChecked=0, Total=3540 [2021-10-29 00:02:12,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-10-29 00:02:12,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 173. [2021-10-29 00:02:12,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.2093023255813953) internal successors, (208), 172 states have internal predecessors, (208), 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) [2021-10-29 00:02:12,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 208 transitions. [2021-10-29 00:02:12,414 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 208 transitions. Word has length 40 [2021-10-29 00:02:12,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:02:12,414 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 208 transitions. [2021-10-29 00:02:12,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 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) [2021-10-29 00:02:12,415 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 208 transitions. [2021-10-29 00:02:12,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-29 00:02:12,416 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:02:12,416 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:02:12,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-29 00:02:12,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-29 00:02:12,625 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:02:12,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:02:12,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1122199553, now seen corresponding path program 2 times [2021-10-29 00:02:12,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:02:12,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877784719] [2021-10-29 00:02:12,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:02:12,627 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:02:12,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:02:13,390 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:02:13,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:02:13,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877784719] [2021-10-29 00:02:13,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877784719] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:13,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736270939] [2021-10-29 00:02:13,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-29 00:02:13,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:02:13,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:02:13,392 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:02:13,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-29 00:02:13,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-29 00:02:13,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:02:13,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-29 00:02:13,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:02:14,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:14,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-10-29 00:02:14,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:14,306 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-10-29 00:02:14,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2021-10-29 00:02:14,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 00:02:14,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-10-29 00:02:14,389 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-29 00:02:14,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736270939] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:14,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:02:14,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16] total 31 [2021-10-29 00:02:14,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319331227] [2021-10-29 00:02:14,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-29 00:02:14,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:02:14,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-29 00:02:14,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-10-29 00:02:14,392 INFO L87 Difference]: Start difference. First operand 173 states and 208 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 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) [2021-10-29 00:02:16,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:02:16,020 INFO L93 Difference]: Finished difference Result 293 states and 350 transitions. [2021-10-29 00:02:16,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-29 00:02:16,021 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 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 40 [2021-10-29 00:02:16,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:02:16,022 INFO L225 Difference]: With dead ends: 293 [2021-10-29 00:02:16,022 INFO L226 Difference]: Without dead ends: 249 [2021-10-29 00:02:16,024 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 32 SyntacticMatches, 8 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=859, Invalid=3971, Unknown=0, NotChecked=0, Total=4830 [2021-10-29 00:02:16,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-10-29 00:02:16,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 164. [2021-10-29 00:02:16,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.1901840490797546) internal successors, (194), 163 states have internal predecessors, (194), 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) [2021-10-29 00:02:16,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 194 transitions. [2021-10-29 00:02:16,046 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 194 transitions. Word has length 40 [2021-10-29 00:02:16,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:02:16,047 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 194 transitions. [2021-10-29 00:02:16,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 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) [2021-10-29 00:02:16,047 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 194 transitions. [2021-10-29 00:02:16,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-29 00:02:16,048 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:02:16,048 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:02:16,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-29 00:02:16,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-29 00:02:16,251 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:02:16,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:02:16,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1721163603, now seen corresponding path program 1 times [2021-10-29 00:02:16,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:02:16,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159673079] [2021-10-29 00:02:16,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:02:16,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:02:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:02:17,230 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:02:17,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:02:17,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159673079] [2021-10-29 00:02:17,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159673079] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:17,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447007067] [2021-10-29 00:02:17,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:02:17,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:02:17,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:02:17,235 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:02:17,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-29 00:02:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:02:17,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-29 00:02:17,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:02:17,882 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-29 00:02:17,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-10-29 00:02:17,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 45 [2021-10-29 00:02:17,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:18,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:18,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:18,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:18,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 34 [2021-10-29 00:02:18,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:18,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:18,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:18,188 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-10-29 00:02:18,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 39 [2021-10-29 00:02:18,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:18,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:18,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:18,404 INFO L354 Elim1Store]: treesize reduction 114, result has 25.0 percent of original size [2021-10-29 00:02:18,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 59 [2021-10-29 00:02:18,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 00:02:18,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-10-29 00:02:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-29 00:02:18,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447007067] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:18,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:02:18,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21] total 35 [2021-10-29 00:02:18,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257491662] [2021-10-29 00:02:18,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-29 00:02:18,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:02:18,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-29 00:02:18,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2021-10-29 00:02:18,555 INFO L87 Difference]: Start difference. First operand 164 states and 194 transitions. Second operand has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:02:20,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:02:20,391 INFO L93 Difference]: Finished difference Result 226 states and 262 transitions. [2021-10-29 00:02:20,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-29 00:02:20,392 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-29 00:02:20,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:02:20,393 INFO L225 Difference]: With dead ends: 226 [2021-10-29 00:02:20,393 INFO L226 Difference]: Without dead ends: 198 [2021-10-29 00:02:20,395 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=492, Invalid=3540, Unknown=0, NotChecked=0, Total=4032 [2021-10-29 00:02:20,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-10-29 00:02:20,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 177. [2021-10-29 00:02:20,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.1761363636363635) internal successors, (207), 176 states have internal predecessors, (207), 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) [2021-10-29 00:02:20,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 207 transitions. [2021-10-29 00:02:20,418 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 207 transitions. Word has length 41 [2021-10-29 00:02:20,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:02:20,418 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 207 transitions. [2021-10-29 00:02:20,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:02:20,419 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 207 transitions. [2021-10-29 00:02:20,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-29 00:02:20,419 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:02:20,420 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:02:20,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-29 00:02:20,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-29 00:02:20,643 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:02:20,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:02:20,643 INFO L85 PathProgramCache]: Analyzing trace with hash -840467502, now seen corresponding path program 5 times [2021-10-29 00:02:20,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:02:20,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136247884] [2021-10-29 00:02:20,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:02:20,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:02:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:02:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 00:02:20,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:02:20,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136247884] [2021-10-29 00:02:20,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136247884] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:20,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847176866] [2021-10-29 00:02:20,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-29 00:02:20,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:02:20,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:02:20,996 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:02:21,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-29 00:02:21,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-29 00:02:21,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:02:21,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-29 00:02:21,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:02:21,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-29 00:02:22,046 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-29 00:02:22,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-10-29 00:02:22,260 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 00:02:22,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-10-29 00:02:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 00:02:22,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847176866] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:22,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:02:22,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 17 [2021-10-29 00:02:22,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707480274] [2021-10-29 00:02:22,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-29 00:02:22,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:02:22,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-29 00:02:22,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-10-29 00:02:22,288 INFO L87 Difference]: Start difference. First operand 177 states and 207 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 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) [2021-10-29 00:02:22,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:02:22,983 INFO L93 Difference]: Finished difference Result 344 states and 417 transitions. [2021-10-29 00:02:22,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-29 00:02:22,984 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 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 43 [2021-10-29 00:02:22,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:02:22,986 INFO L225 Difference]: With dead ends: 344 [2021-10-29 00:02:22,986 INFO L226 Difference]: Without dead ends: 300 [2021-10-29 00:02:22,987 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=194, Invalid=798, Unknown=0, NotChecked=0, Total=992 [2021-10-29 00:02:22,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-10-29 00:02:23,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 216. [2021-10-29 00:02:23,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.2) internal successors, (258), 215 states have internal predecessors, (258), 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) [2021-10-29 00:02:23,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 258 transitions. [2021-10-29 00:02:23,026 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 258 transitions. Word has length 43 [2021-10-29 00:02:23,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:02:23,027 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 258 transitions. [2021-10-29 00:02:23,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 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) [2021-10-29 00:02:23,027 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 258 transitions. [2021-10-29 00:02:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-29 00:02:23,029 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:02:23,029 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:02:23,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-10-29 00:02:23,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-29 00:02:23,237 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:02:23,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:02:23,237 INFO L85 PathProgramCache]: Analyzing trace with hash 632000141, now seen corresponding path program 1 times [2021-10-29 00:02:23,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:02:23,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137605428] [2021-10-29 00:02:23,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:02:23,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:02:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:02:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 00:02:23,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:02:23,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137605428] [2021-10-29 00:02:23,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137605428] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:23,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264484843] [2021-10-29 00:02:23,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:02:23,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:02:23,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:02:23,526 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:02:23,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-29 00:02:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:02:24,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-29 00:02:24,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:02:24,264 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-29 00:02:24,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-29 00:02:24,339 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-29 00:02:24,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 28 [2021-10-29 00:02:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-29 00:02:24,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264484843] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:24,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:02:24,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 21 [2021-10-29 00:02:24,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829784994] [2021-10-29 00:02:24,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-29 00:02:24,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:02:24,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-29 00:02:24,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-10-29 00:02:24,372 INFO L87 Difference]: Start difference. First operand 216 states and 258 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 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) [2021-10-29 00:02:25,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:02:25,185 INFO L93 Difference]: Finished difference Result 366 states and 443 transitions. [2021-10-29 00:02:25,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-29 00:02:25,186 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 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 44 [2021-10-29 00:02:25,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:02:25,188 INFO L225 Difference]: With dead ends: 366 [2021-10-29 00:02:25,188 INFO L226 Difference]: Without dead ends: 322 [2021-10-29 00:02:25,189 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=1903, Unknown=0, NotChecked=0, Total=2256 [2021-10-29 00:02:25,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-10-29 00:02:25,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 230. [2021-10-29 00:02:25,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.205240174672489) internal successors, (276), 229 states have internal predecessors, (276), 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) [2021-10-29 00:02:25,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 276 transitions. [2021-10-29 00:02:25,229 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 276 transitions. Word has length 44 [2021-10-29 00:02:25,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:02:25,230 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 276 transitions. [2021-10-29 00:02:25,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 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) [2021-10-29 00:02:25,230 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 276 transitions. [2021-10-29 00:02:25,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-29 00:02:25,231 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:02:25,231 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:02:25,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-29 00:02:25,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:02:25,443 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:02:25,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:02:25,443 INFO L85 PathProgramCache]: Analyzing trace with hash 906213909, now seen corresponding path program 2 times [2021-10-29 00:02:25,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:02:25,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463088283] [2021-10-29 00:02:25,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:02:25,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:02:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:02:25,983 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 00:02:25,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:02:25,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463088283] [2021-10-29 00:02:25,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463088283] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:25,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330743522] [2021-10-29 00:02:25,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-29 00:02:25,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:02:25,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:02:25,986 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:02:26,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-29 00:02:26,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-29 00:02:26,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:02:26,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-29 00:02:26,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:02:26,720 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-29 00:02:26,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 29 [2021-10-29 00:02:26,969 INFO L354 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2021-10-29 00:02:26,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 40 [2021-10-29 00:02:27,113 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-29 00:02:27,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2021-10-29 00:02:27,204 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-29 00:02:27,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 30 [2021-10-29 00:02:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-29 00:02:27,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330743522] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:27,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:02:27,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 29 [2021-10-29 00:02:27,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729835162] [2021-10-29 00:02:27,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-29 00:02:27,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:02:27,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-29 00:02:27,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-10-29 00:02:27,236 INFO L87 Difference]: Start difference. First operand 230 states and 276 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:02:28,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:02:28,286 INFO L93 Difference]: Finished difference Result 289 states and 344 transitions. [2021-10-29 00:02:28,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-29 00:02:28,287 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-10-29 00:02:28,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:02:28,290 INFO L225 Difference]: With dead ends: 289 [2021-10-29 00:02:28,290 INFO L226 Difference]: Without dead ends: 287 [2021-10-29 00:02:28,291 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=272, Invalid=1890, Unknown=0, NotChecked=0, Total=2162 [2021-10-29 00:02:28,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-29 00:02:28,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 234. [2021-10-29 00:02:28,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.2145922746781115) internal successors, (283), 233 states have internal predecessors, (283), 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) [2021-10-29 00:02:28,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 283 transitions. [2021-10-29 00:02:28,328 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 283 transitions. Word has length 44 [2021-10-29 00:02:28,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:02:28,329 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 283 transitions. [2021-10-29 00:02:28,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:02:28,329 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 283 transitions. [2021-10-29 00:02:28,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-29 00:02:28,330 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:02:28,331 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:02:28,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-29 00:02:28,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:02:28,555 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:02:28,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:02:28,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1747430856, now seen corresponding path program 4 times [2021-10-29 00:02:28,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:02:28,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145389063] [2021-10-29 00:02:28,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:02:28,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:02:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:02:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:02:29,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:02:29,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145389063] [2021-10-29 00:02:29,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145389063] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:29,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127058646] [2021-10-29 00:02:29,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-29 00:02:29,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:02:29,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:02:29,407 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:02:29,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-29 00:02:30,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-29 00:02:30,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:02:30,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-29 00:02:30,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:02:30,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:30,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2021-10-29 00:02:30,771 INFO L354 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2021-10-29 00:02:30,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 39 [2021-10-29 00:02:31,110 INFO L354 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2021-10-29 00:02:31,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 51 [2021-10-29 00:02:31,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 00:02:31,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2021-10-29 00:02:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-29 00:02:31,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127058646] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:31,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:02:31,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-10-29 00:02:31,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435088519] [2021-10-29 00:02:31,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-29 00:02:31,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:02:31,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-29 00:02:31,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2021-10-29 00:02:31,263 INFO L87 Difference]: Start difference. First operand 234 states and 283 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 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) [2021-10-29 00:02:35,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:02:35,170 INFO L93 Difference]: Finished difference Result 424 states and 507 transitions. [2021-10-29 00:02:35,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-10-29 00:02:35,170 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 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 45 [2021-10-29 00:02:35,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:02:35,172 INFO L225 Difference]: With dead ends: 424 [2021-10-29 00:02:35,172 INFO L226 Difference]: Without dead ends: 367 [2021-10-29 00:02:35,176 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2997 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1101, Invalid=8211, Unknown=0, NotChecked=0, Total=9312 [2021-10-29 00:02:35,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-10-29 00:02:35,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 240. [2021-10-29 00:02:35,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.209205020920502) internal successors, (289), 239 states have internal predecessors, (289), 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) [2021-10-29 00:02:35,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 289 transitions. [2021-10-29 00:02:35,222 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 289 transitions. Word has length 45 [2021-10-29 00:02:35,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:02:35,223 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 289 transitions. [2021-10-29 00:02:35,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 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) [2021-10-29 00:02:35,223 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 289 transitions. [2021-10-29 00:02:35,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-29 00:02:35,224 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:02:35,225 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:02:35,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-29 00:02:35,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:02:35,447 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:02:35,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:02:35,447 INFO L85 PathProgramCache]: Analyzing trace with hash 994889206, now seen corresponding path program 1 times [2021-10-29 00:02:35,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:02:35,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201443227] [2021-10-29 00:02:35,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:02:35,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:02:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:02:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-29 00:02:36,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:02:36,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201443227] [2021-10-29 00:02:36,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201443227] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:36,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339245716] [2021-10-29 00:02:36,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:02:36,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:02:36,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:02:36,164 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:02:36,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-29 00:02:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:02:36,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-29 00:02:36,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:02:37,044 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-29 00:02:37,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-29 00:02:37,417 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-10-29 00:02:37,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 42 [2021-10-29 00:02:37,879 INFO L354 Elim1Store]: treesize reduction 88, result has 22.1 percent of original size [2021-10-29 00:02:37,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 48 [2021-10-29 00:02:38,413 INFO L354 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2021-10-29 00:02:38,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 54 [2021-10-29 00:02:38,661 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-10-29 00:02:38,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 45 [2021-10-29 00:02:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-29 00:02:38,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339245716] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:38,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:02:38,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 39 [2021-10-29 00:02:38,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132403768] [2021-10-29 00:02:38,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-29 00:02:38,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:02:38,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-29 00:02:38,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1303, Unknown=0, NotChecked=0, Total=1482 [2021-10-29 00:02:38,698 INFO L87 Difference]: Start difference. First operand 240 states and 289 transitions. Second operand has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 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) [2021-10-29 00:02:40,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:02:40,176 INFO L93 Difference]: Finished difference Result 332 states and 396 transitions. [2021-10-29 00:02:40,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-29 00:02:40,177 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 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 45 [2021-10-29 00:02:40,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:02:40,179 INFO L225 Difference]: With dead ends: 332 [2021-10-29 00:02:40,179 INFO L226 Difference]: Without dead ends: 330 [2021-10-29 00:02:40,180 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=415, Invalid=2891, Unknown=0, NotChecked=0, Total=3306 [2021-10-29 00:02:40,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-10-29 00:02:40,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 259. [2021-10-29 00:02:40,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.2209302325581395) internal successors, (315), 258 states have internal predecessors, (315), 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) [2021-10-29 00:02:40,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 315 transitions. [2021-10-29 00:02:40,229 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 315 transitions. Word has length 45 [2021-10-29 00:02:40,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:02:40,230 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 315 transitions. [2021-10-29 00:02:40,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 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) [2021-10-29 00:02:40,230 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 315 transitions. [2021-10-29 00:02:40,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-29 00:02:40,232 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:02:40,232 INFO L513 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:02:40,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-29 00:02:40,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-29 00:02:40,455 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:02:40,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:02:40,455 INFO L85 PathProgramCache]: Analyzing trace with hash -583456118, now seen corresponding path program 2 times [2021-10-29 00:02:40,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:02:40,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696610890] [2021-10-29 00:02:40,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:02:40,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:02:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:02:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:02:41,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:02:41,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696610890] [2021-10-29 00:02:41,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696610890] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:41,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074215403] [2021-10-29 00:02:41,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-29 00:02:41,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:02:41,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:02:41,608 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:02:41,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-29 00:02:42,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-29 00:02:42,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:02:42,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-29 00:02:42,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:02:42,605 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-29 00:02:42,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-29 00:02:42,850 INFO L354 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2021-10-29 00:02:42,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 41 [2021-10-29 00:02:43,110 INFO L354 Elim1Store]: treesize reduction 172, result has 17.3 percent of original size [2021-10-29 00:02:43,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 61 [2021-10-29 00:02:43,544 INFO L354 Elim1Store]: treesize reduction 363, result has 6.9 percent of original size [2021-10-29 00:02:43,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 77 treesize of output 61 [2021-10-29 00:02:43,955 INFO L354 Elim1Store]: treesize reduction 147, result has 22.6 percent of original size [2021-10-29 00:02:43,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 70 [2021-10-29 00:02:44,281 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-10-29 00:02:44,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 37 [2021-10-29 00:02:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-29 00:02:44,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074215403] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:44,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:02:44,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 50 [2021-10-29 00:02:44,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659786452] [2021-10-29 00:02:44,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-10-29 00:02:44,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:02:44,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-10-29 00:02:44,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2200, Unknown=0, NotChecked=0, Total=2450 [2021-10-29 00:02:44,331 INFO L87 Difference]: Start difference. First operand 259 states and 315 transitions. Second operand has 50 states, 50 states have (on average 1.72) internal successors, (86), 50 states have internal predecessors, (86), 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) [2021-10-29 00:02:47,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:02:47,499 INFO L93 Difference]: Finished difference Result 398 states and 486 transitions. [2021-10-29 00:02:47,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-29 00:02:47,499 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 50 states have internal predecessors, (86), 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 46 [2021-10-29 00:02:47,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:02:47,502 INFO L225 Difference]: With dead ends: 398 [2021-10-29 00:02:47,502 INFO L226 Difference]: Without dead ends: 360 [2021-10-29 00:02:47,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2800 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=834, Invalid=7356, Unknown=0, NotChecked=0, Total=8190 [2021-10-29 00:02:47,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-10-29 00:02:47,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 286. [2021-10-29 00:02:47,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.2771929824561403) internal successors, (364), 285 states have internal predecessors, (364), 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) [2021-10-29 00:02:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 364 transitions. [2021-10-29 00:02:47,548 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 364 transitions. Word has length 46 [2021-10-29 00:02:47,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:02:47,548 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 364 transitions. [2021-10-29 00:02:47,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 50 states have internal predecessors, (86), 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) [2021-10-29 00:02:47,549 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 364 transitions. [2021-10-29 00:02:47,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-29 00:02:47,550 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:02:47,550 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:02:47,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-29 00:02:47,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-29 00:02:47,771 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:02:47,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:02:47,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1547861096, now seen corresponding path program 6 times [2021-10-29 00:02:47,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:02:47,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565842724] [2021-10-29 00:02:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:02:47,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:02:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:02:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-29 00:02:47,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:02:47,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565842724] [2021-10-29 00:02:47,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565842724] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:47,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840333719] [2021-10-29 00:02:47,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-29 00:02:47,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:02:47,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:02:47,975 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:02:47,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-29 00:02:48,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-29 00:02:48,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:02:48,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-29 00:02:48,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:02:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-29 00:02:49,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840333719] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:49,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:02:49,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-10-29 00:02:49,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817812996] [2021-10-29 00:02:49,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-29 00:02:49,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:02:49,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-29 00:02:49,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-10-29 00:02:49,186 INFO L87 Difference]: Start difference. First operand 286 states and 364 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-10-29 00:02:49,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:02:49,579 INFO L93 Difference]: Finished difference Result 745 states and 948 transitions. [2021-10-29 00:02:49,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-29 00:02:49,580 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) Word has length 47 [2021-10-29 00:02:49,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:02:49,583 INFO L225 Difference]: With dead ends: 745 [2021-10-29 00:02:49,583 INFO L226 Difference]: Without dead ends: 584 [2021-10-29 00:02:49,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-10-29 00:02:49,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-10-29 00:02:49,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 422. [2021-10-29 00:02:49,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 1.2304038004750595) internal successors, (518), 421 states have internal predecessors, (518), 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) [2021-10-29 00:02:49,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 518 transitions. [2021-10-29 00:02:49,644 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 518 transitions. Word has length 47 [2021-10-29 00:02:49,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:02:49,645 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 518 transitions. [2021-10-29 00:02:49,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-10-29 00:02:49,645 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 518 transitions. [2021-10-29 00:02:49,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-29 00:02:49,646 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:02:49,646 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:02:49,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-29 00:02:49,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:02:49,847 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:02:49,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:02:49,847 INFO L85 PathProgramCache]: Analyzing trace with hash 972601763, now seen corresponding path program 2 times [2021-10-29 00:02:49,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:02:49,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588053569] [2021-10-29 00:02:49,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:02:49,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:02:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:02:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:02:50,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:02:50,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588053569] [2021-10-29 00:02:50,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588053569] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:50,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002696917] [2021-10-29 00:02:50,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-29 00:02:50,308 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:02:50,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:02:50,314 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:02:50,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-29 00:02:51,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-29 00:02:51,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:02:51,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-29 00:02:51,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:02:51,421 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-29 00:02:51,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2021-10-29 00:02:51,679 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-29 00:02:51,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 37 [2021-10-29 00:02:51,708 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-29 00:02:51,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002696917] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:51,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:02:51,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 23 [2021-10-29 00:02:51,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729364966] [2021-10-29 00:02:51,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-29 00:02:51,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:02:51,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-29 00:02:51,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-10-29 00:02:51,710 INFO L87 Difference]: Start difference. First operand 422 states and 518 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 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) [2021-10-29 00:02:52,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:02:52,688 INFO L93 Difference]: Finished difference Result 491 states and 604 transitions. [2021-10-29 00:02:52,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-29 00:02:52,689 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 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 48 [2021-10-29 00:02:52,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:02:52,691 INFO L225 Difference]: With dead ends: 491 [2021-10-29 00:02:52,691 INFO L226 Difference]: Without dead ends: 474 [2021-10-29 00:02:52,691 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=249, Invalid=1233, Unknown=0, NotChecked=0, Total=1482 [2021-10-29 00:02:52,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-10-29 00:02:52,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 411. [2021-10-29 00:02:52,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 1.221951219512195) internal successors, (501), 410 states have internal predecessors, (501), 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) [2021-10-29 00:02:52,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 501 transitions. [2021-10-29 00:02:52,755 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 501 transitions. Word has length 48 [2021-10-29 00:02:52,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:02:52,755 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 501 transitions. [2021-10-29 00:02:52,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 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) [2021-10-29 00:02:52,755 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 501 transitions. [2021-10-29 00:02:52,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-29 00:02:52,757 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:02:52,757 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:02:52,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-29 00:02:52,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-29 00:02:52,978 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:02:52,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:02:52,978 INFO L85 PathProgramCache]: Analyzing trace with hash 2023640862, now seen corresponding path program 1 times [2021-10-29 00:02:52,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:02:52,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429640321] [2021-10-29 00:02:52,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:02:52,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:02:53,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:02:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 16 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-29 00:02:53,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:02:53,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429640321] [2021-10-29 00:02:53,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429640321] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:53,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624412475] [2021-10-29 00:02:53,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:02:53,319 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:02:53,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:02:53,320 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:02:53,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-29 00:02:54,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:02:54,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-29 00:02:54,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:02:54,346 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-29 00:02:54,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-29 00:02:54,606 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-10-29 00:02:54,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 42 [2021-10-29 00:02:54,729 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-29 00:02:54,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 30 [2021-10-29 00:02:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-29 00:02:54,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624412475] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:54,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:02:54,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 29 [2021-10-29 00:02:54,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176479272] [2021-10-29 00:02:54,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-29 00:02:54,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:02:54,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-29 00:02:54,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-10-29 00:02:54,756 INFO L87 Difference]: Start difference. First operand 411 states and 501 transitions. Second operand has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 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) [2021-10-29 00:02:56,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:02:56,457 INFO L93 Difference]: Finished difference Result 567 states and 683 transitions. [2021-10-29 00:02:56,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-29 00:02:56,457 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 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 49 [2021-10-29 00:02:56,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:02:56,459 INFO L225 Difference]: With dead ends: 567 [2021-10-29 00:02:56,459 INFO L226 Difference]: Without dead ends: 496 [2021-10-29 00:02:56,460 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=659, Invalid=4891, Unknown=0, NotChecked=0, Total=5550 [2021-10-29 00:02:56,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-10-29 00:02:56,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 414. [2021-10-29 00:02:56,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.2106537530266344) internal successors, (500), 413 states have internal predecessors, (500), 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) [2021-10-29 00:02:56,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 500 transitions. [2021-10-29 00:02:56,527 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 500 transitions. Word has length 49 [2021-10-29 00:02:56,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:02:56,528 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 500 transitions. [2021-10-29 00:02:56,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 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) [2021-10-29 00:02:56,528 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 500 transitions. [2021-10-29 00:02:56,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-29 00:02:56,529 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:02:56,530 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:02:56,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-29 00:02:56,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:02:56,750 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:02:56,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:02:56,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1769159842, now seen corresponding path program 3 times [2021-10-29 00:02:56,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:02:56,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267219506] [2021-10-29 00:02:56,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:02:56,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:02:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:02:57,752 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 00:02:57,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:02:57,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267219506] [2021-10-29 00:02:57,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267219506] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:57,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954690100] [2021-10-29 00:02:57,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-29 00:02:57,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:02:57,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:02:57,753 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:02:57,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-29 00:02:58,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-29 00:02:58,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:02:58,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-29 00:02:58,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:02:58,850 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-29 00:02:58,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-10-29 00:02:58,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 46 [2021-10-29 00:02:58,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:58,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:58,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:58,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:58,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-10-29 00:02:59,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:59,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:59,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:59,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:59,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:59,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:59,184 INFO L354 Elim1Store]: treesize reduction 121, result has 8.3 percent of original size [2021-10-29 00:02:59,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 60 treesize of output 48 [2021-10-29 00:02:59,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:59,507 INFO L354 Elim1Store]: treesize reduction 187, result has 12.6 percent of original size [2021-10-29 00:02:59,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 61 treesize of output 53 [2021-10-29 00:02:59,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 27 [2021-10-29 00:02:59,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:59,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:59,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:59,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:02:59,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 31 [2021-10-29 00:02:59,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 00:02:59,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-10-29 00:02:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-29 00:02:59,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954690100] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:59,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:02:59,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 38 [2021-10-29 00:02:59,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125803148] [2021-10-29 00:02:59,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-29 00:02:59,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:02:59,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-29 00:02:59,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2021-10-29 00:02:59,880 INFO L87 Difference]: Start difference. First operand 414 states and 500 transitions. Second operand has 38 states, 38 states have (on average 1.763157894736842) internal successors, (67), 38 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:03:01,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:03:01,600 INFO L93 Difference]: Finished difference Result 609 states and 742 transitions. [2021-10-29 00:03:01,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-10-29 00:03:01,601 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.763157894736842) internal successors, (67), 38 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-10-29 00:03:01,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:03:01,604 INFO L225 Difference]: With dead ends: 609 [2021-10-29 00:03:01,604 INFO L226 Difference]: Without dead ends: 491 [2021-10-29 00:03:01,605 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 29 SyntacticMatches, 12 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=607, Invalid=4363, Unknown=0, NotChecked=0, Total=4970 [2021-10-29 00:03:01,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-10-29 00:03:01,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 412. [2021-10-29 00:03:01,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.1995133819951338) internal successors, (493), 411 states have internal predecessors, (493), 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) [2021-10-29 00:03:01,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 493 transitions. [2021-10-29 00:03:01,677 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 493 transitions. Word has length 49 [2021-10-29 00:03:01,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:03:01,677 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 493 transitions. [2021-10-29 00:03:01,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.763157894736842) internal successors, (67), 38 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:03:01,677 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 493 transitions. [2021-10-29 00:03:01,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-29 00:03:01,679 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:03:01,679 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:03:01,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-29 00:03:01,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-29 00:03:01,903 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:03:01,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:03:01,903 INFO L85 PathProgramCache]: Analyzing trace with hash -184694379, now seen corresponding path program 2 times [2021-10-29 00:03:01,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:03:01,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795928035] [2021-10-29 00:03:01,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:01,903 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:03:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:02,533 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-29 00:03:02,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:03:02,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795928035] [2021-10-29 00:03:02,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795928035] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:03:02,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758777120] [2021-10-29 00:03:02,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-29 00:03:02,534 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:03:02,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:03:02,536 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:03:02,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-29 00:03:03,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-29 00:03:03,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:03:03,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-29 00:03:03,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:03:03,685 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-29 00:03:03,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-29 00:03:03,898 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-10-29 00:03:03,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 42 [2021-10-29 00:03:04,325 INFO L354 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2021-10-29 00:03:04,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 54 [2021-10-29 00:03:04,540 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-10-29 00:03:04,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 45 [2021-10-29 00:03:04,569 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-29 00:03:04,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758777120] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:03:04,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:03:04,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 38 [2021-10-29 00:03:04,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547201966] [2021-10-29 00:03:04,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-29 00:03:04,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:03:04,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-29 00:03:04,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1216, Unknown=0, NotChecked=0, Total=1406 [2021-10-29 00:03:04,572 INFO L87 Difference]: Start difference. First operand 412 states and 493 transitions. Second operand has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 38 states have internal predecessors, (89), 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) [2021-10-29 00:03:09,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:03:09,149 INFO L93 Difference]: Finished difference Result 976 states and 1177 transitions. [2021-10-29 00:03:09,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-10-29 00:03:09,150 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 38 states have internal predecessors, (89), 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 50 [2021-10-29 00:03:09,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:03:09,153 INFO L225 Difference]: With dead ends: 976 [2021-10-29 00:03:09,153 INFO L226 Difference]: Without dead ends: 813 [2021-10-29 00:03:09,156 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5699 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1971, Invalid=14031, Unknown=0, NotChecked=0, Total=16002 [2021-10-29 00:03:09,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2021-10-29 00:03:09,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 489. [2021-10-29 00:03:09,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 1.2581967213114753) internal successors, (614), 488 states have internal predecessors, (614), 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) [2021-10-29 00:03:09,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 614 transitions. [2021-10-29 00:03:09,249 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 614 transitions. Word has length 50 [2021-10-29 00:03:09,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:03:09,249 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 614 transitions. [2021-10-29 00:03:09,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 38 states have internal predecessors, (89), 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) [2021-10-29 00:03:09,250 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 614 transitions. [2021-10-29 00:03:09,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-29 00:03:09,251 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:03:09,251 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:03:09,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-29 00:03:09,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-29 00:03:09,479 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:03:09,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:03:09,479 INFO L85 PathProgramCache]: Analyzing trace with hash 503230019, now seen corresponding path program 7 times [2021-10-29 00:03:09,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:03:09,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506700783] [2021-10-29 00:03:09,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:09,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:03:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:03:10,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:03:10,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506700783] [2021-10-29 00:03:10,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506700783] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:03:10,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819190738] [2021-10-29 00:03:10,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-29 00:03:10,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:03:10,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:03:10,268 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:03:10,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-29 00:03:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:11,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-29 00:03:11,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:03:11,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-29 00:03:11,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:03:11,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-10-29 00:03:11,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:03:11,775 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-10-29 00:03:11,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-10-29 00:03:11,980 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-29 00:03:11,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 37 [2021-10-29 00:03:12,016 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-29 00:03:12,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819190738] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:03:12,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:03:12,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 28 [2021-10-29 00:03:12,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219765531] [2021-10-29 00:03:12,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-29 00:03:12,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:03:12,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-29 00:03:12,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-10-29 00:03:12,018 INFO L87 Difference]: Start difference. First operand 489 states and 614 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 28 states have internal predecessors, (73), 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) [2021-10-29 00:03:13,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:03:13,019 INFO L93 Difference]: Finished difference Result 746 states and 933 transitions. [2021-10-29 00:03:13,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-29 00:03:13,020 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 28 states have internal predecessors, (73), 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 51 [2021-10-29 00:03:13,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:03:13,022 INFO L225 Difference]: With dead ends: 746 [2021-10-29 00:03:13,023 INFO L226 Difference]: Without dead ends: 744 [2021-10-29 00:03:13,023 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 44 SyntacticMatches, 9 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=279, Invalid=1613, Unknown=0, NotChecked=0, Total=1892 [2021-10-29 00:03:13,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-10-29 00:03:13,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 505. [2021-10-29 00:03:13,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.253968253968254) internal successors, (632), 504 states have internal predecessors, (632), 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) [2021-10-29 00:03:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 632 transitions. [2021-10-29 00:03:13,113 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 632 transitions. Word has length 51 [2021-10-29 00:03:13,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:03:13,114 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 632 transitions. [2021-10-29 00:03:13,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 28 states have internal predecessors, (73), 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) [2021-10-29 00:03:13,114 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 632 transitions. [2021-10-29 00:03:13,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-29 00:03:13,116 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:03:13,116 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:03:13,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-29 00:03:13,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-29 00:03:13,339 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:03:13,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:03:13,339 INFO L85 PathProgramCache]: Analyzing trace with hash -663049668, now seen corresponding path program 3 times [2021-10-29 00:03:13,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:03:13,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805714948] [2021-10-29 00:03:13,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:13,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:03:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-29 00:03:14,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:03:14,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805714948] [2021-10-29 00:03:14,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805714948] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:03:14,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11716852] [2021-10-29 00:03:14,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-29 00:03:14,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:03:14,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:03:14,082 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:03:14,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-29 00:03:15,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-29 00:03:15,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:03:15,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-29 00:03:15,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:03:15,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:03:15,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-10-29 00:03:15,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:03:15,587 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-10-29 00:03:15,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2021-10-29 00:03:15,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:03:15,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:03:15,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:03:15,766 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 00:03:15,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-10-29 00:03:15,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 00:03:15,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-10-29 00:03:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-29 00:03:15,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11716852] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:03:15,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:03:15,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-10-29 00:03:15,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753619294] [2021-10-29 00:03:15,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-29 00:03:15,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:03:15,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-29 00:03:15,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-10-29 00:03:15,969 INFO L87 Difference]: Start difference. First operand 505 states and 632 transitions. Second operand has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 34 states have internal predecessors, (92), 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) [2021-10-29 00:03:17,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:03:17,067 INFO L93 Difference]: Finished difference Result 827 states and 1053 transitions. [2021-10-29 00:03:17,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-29 00:03:17,068 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 34 states have internal predecessors, (92), 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 52 [2021-10-29 00:03:17,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:03:17,071 INFO L225 Difference]: With dead ends: 827 [2021-10-29 00:03:17,072 INFO L226 Difference]: Without dead ends: 664 [2021-10-29 00:03:17,073 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=385, Invalid=2807, Unknown=0, NotChecked=0, Total=3192 [2021-10-29 00:03:17,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-10-29 00:03:17,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 531. [2021-10-29 00:03:17,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.2528301886792452) internal successors, (664), 530 states have internal predecessors, (664), 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) [2021-10-29 00:03:17,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 664 transitions. [2021-10-29 00:03:17,211 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 664 transitions. Word has length 52 [2021-10-29 00:03:17,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:03:17,211 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 664 transitions. [2021-10-29 00:03:17,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 34 states have internal predecessors, (92), 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) [2021-10-29 00:03:17,212 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 664 transitions. [2021-10-29 00:03:17,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-29 00:03:17,214 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:03:17,214 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:03:17,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-29 00:03:17,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:03:17,427 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:03:17,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:03:17,427 INFO L85 PathProgramCache]: Analyzing trace with hash -169981182, now seen corresponding path program 4 times [2021-10-29 00:03:17,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:03:17,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126859773] [2021-10-29 00:03:17,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:17,428 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:03:17,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:17,860 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-29 00:03:17,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:03:17,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126859773] [2021-10-29 00:03:17,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126859773] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:03:17,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921478904] [2021-10-29 00:03:17,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-29 00:03:17,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:03:17,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:03:17,867 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:03:17,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-29 00:03:18,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-29 00:03:18,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:03:18,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-29 00:03:18,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:03:19,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:03:19,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-10-29 00:03:19,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:03:19,478 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-10-29 00:03:19,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-10-29 00:03:19,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 00:03:19,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-10-29 00:03:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-29 00:03:19,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921478904] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:03:19,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:03:19,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-10-29 00:03:19,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673895433] [2021-10-29 00:03:19,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-29 00:03:19,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:03:19,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-29 00:03:19,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2021-10-29 00:03:19,669 INFO L87 Difference]: Start difference. First operand 531 states and 664 transitions. Second operand has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 34 states have internal predecessors, (92), 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) [2021-10-29 00:03:20,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:03:20,852 INFO L93 Difference]: Finished difference Result 918 states and 1180 transitions. [2021-10-29 00:03:20,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-29 00:03:20,852 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 34 states have internal predecessors, (92), 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 52 [2021-10-29 00:03:20,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:03:20,855 INFO L225 Difference]: With dead ends: 918 [2021-10-29 00:03:20,856 INFO L226 Difference]: Without dead ends: 800 [2021-10-29 00:03:20,857 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=499, Invalid=3161, Unknown=0, NotChecked=0, Total=3660 [2021-10-29 00:03:20,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-10-29 00:03:20,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 648. [2021-10-29 00:03:20,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 1.276661514683153) internal successors, (826), 647 states have internal predecessors, (826), 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) [2021-10-29 00:03:20,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 826 transitions. [2021-10-29 00:03:20,958 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 826 transitions. Word has length 52 [2021-10-29 00:03:20,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:03:20,958 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 826 transitions. [2021-10-29 00:03:20,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 34 states have internal predecessors, (92), 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) [2021-10-29 00:03:20,959 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 826 transitions. [2021-10-29 00:03:20,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-29 00:03:20,960 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:03:20,961 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:03:20,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-29 00:03:21,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:03:21,179 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 00:03:21,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:03:21,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1569114548, now seen corresponding path program 2 times [2021-10-29 00:03:21,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:03:21,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127615313] [2021-10-29 00:03:21,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:21,180 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:03:21,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:03:21,238 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 00:03:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:03:21,311 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-29 00:03:21,311 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 00:03:21,312 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 00:03:21,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-10-29 00:03:21,320 INFO L731 BasicCegarLoop]: Path program histogram: [7, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1] [2021-10-29 00:03:21,325 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 00:03:21,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 12:03:21 BoogieIcfgContainer [2021-10-29 00:03:21,409 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 00:03:21,410 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 00:03:21,410 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 00:03:21,410 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 00:03:21,411 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:01:40" (3/4) ... [2021-10-29 00:03:21,417 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-29 00:03:21,517 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ee45f3-c002-45eb-bafc-80824074e644/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-29 00:03:21,518 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 00:03:21,519 INFO L168 Benchmark]: Toolchain (without parser) took 101928.96 ms. Allocated memory was 121.6 MB in the beginning and 446.7 MB in the end (delta: 325.1 MB). Free memory was 92.1 MB in the beginning and 263.4 MB in the end (delta: -171.4 MB). Peak memory consumption was 154.2 MB. Max. memory is 16.1 GB. [2021-10-29 00:03:21,519 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 88.1 MB. Free memory was 44.8 MB in the beginning and 44.7 MB in the end (delta: 52.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 00:03:21,519 INFO L168 Benchmark]: CACSL2BoogieTranslator took 459.86 ms. Allocated memory is still 121.6 MB. Free memory was 92.1 MB in the beginning and 97.3 MB in the end (delta: -5.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-29 00:03:21,520 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.48 ms. Allocated memory is still 121.6 MB. Free memory was 97.3 MB in the beginning and 95.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 00:03:21,520 INFO L168 Benchmark]: Boogie Preprocessor took 25.36 ms. Allocated memory is still 121.6 MB. Free memory was 95.6 MB in the beginning and 94.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 00:03:21,521 INFO L168 Benchmark]: RCFGBuilder took 446.91 ms. Allocated memory is still 121.6 MB. Free memory was 94.4 MB in the beginning and 83.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-29 00:03:21,522 INFO L168 Benchmark]: TraceAbstraction took 100834.01 ms. Allocated memory was 121.6 MB in the beginning and 446.7 MB in the end (delta: 325.1 MB). Free memory was 83.1 MB in the beginning and 267.6 MB in the end (delta: -184.5 MB). Peak memory consumption was 142.8 MB. Max. memory is 16.1 GB. [2021-10-29 00:03:21,522 INFO L168 Benchmark]: Witness Printer took 108.17 ms. Allocated memory is still 446.7 MB. Free memory was 266.6 MB in the beginning and 263.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-29 00:03:21,527 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 88.1 MB. Free memory was 44.8 MB in the beginning and 44.7 MB in the end (delta: 52.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 459.86 ms. Allocated memory is still 121.6 MB. Free memory was 92.1 MB in the beginning and 97.3 MB in the end (delta: -5.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.48 ms. Allocated memory is still 121.6 MB. Free memory was 97.3 MB in the beginning and 95.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.36 ms. Allocated memory is still 121.6 MB. Free memory was 95.6 MB in the beginning and 94.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 446.91 ms. Allocated memory is still 121.6 MB. Free memory was 94.4 MB in the beginning and 83.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 100834.01 ms. Allocated memory was 121.6 MB in the beginning and 446.7 MB in the end (delta: 325.1 MB). Free memory was 83.1 MB in the beginning and 267.6 MB in the end (delta: -184.5 MB). Peak memory consumption was 142.8 MB. Max. memory is 16.1 GB. * Witness Printer took 108.17 ms. Allocated memory is still 446.7 MB. Free memory was 266.6 MB in the beginning and 263.4 MB in the end (delta: 3.1 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int SIZE=__VERIFIER_nondet_uint(); [L15] int i, j, k, key; [L16] int v[SIZE]; [L17] j=0 [L17] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND TRUE (i>=0) && (v[i]>key) [L23] COND FALSE !(i<2) [L25] i = i - 1 [L22] (i>=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND TRUE (i>=0) && (v[i]>key) [L23] COND TRUE i<2 [L24] EXPR v[i] [L24] v[i+1] = v[i] [L25] i = i - 1 [L22] (i>=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND FALSE !(j