./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.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_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/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_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/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_39b45d18-6041-49d9-b491-4bb1f0039f29/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 2dec1b2e3c1461164aa09bac8cca047a14ba0fda75d53737804411255b62653a ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 [2021-10-28 23:25:07,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:25:07,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:25:07,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:25:07,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:25:07,331 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:25:07,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:25:07,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:25:07,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:25:07,349 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:25:07,350 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:25:07,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:25:07,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:25:07,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:25:07,364 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:25:07,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:25:07,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:25:07,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:25:07,378 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:25:07,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:25:07,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:25:07,390 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:25:07,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:25:07,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:25:07,409 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:25:07,410 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:25:07,410 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:25:07,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:25:07,414 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:25:07,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:25:07,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:25:07,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:25:07,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:25:07,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:25:07,423 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:25:07,424 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:25:07,425 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:25:07,425 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:25:07,425 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:25:07,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:25:07,427 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:25:07,428 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 23:25:07,474 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:25:07,474 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:25:07,475 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:25:07,476 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:25:07,485 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:25:07,486 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:25:07,486 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:25:07,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:25:07,487 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:25:07,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:25:07,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:25:07,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:25:07,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 23:25:07,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:25:07,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 23:25:07,490 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:25:07,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:25:07,491 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:25:07,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 23:25:07,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:25:07,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:25:07,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:25:07,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:25:07,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:25:07,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:25:07,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 23:25:07,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:25:07,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:25:07,495 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 23:25:07,497 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 23:25:07,497 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 23:25:07,497 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:25:07,498 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_39b45d18-6041-49d9-b491-4bb1f0039f29/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2dec1b2e3c1461164aa09bac8cca047a14ba0fda75d53737804411255b62653a [2021-10-28 23:25:07,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:25:07,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:25:07,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:25:07,815 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:25:07,815 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:25:07,817 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.c [2021-10-28 23:25:07,926 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/data/ba9f16358/c4d2ac80fadd425182688868176122a6/FLAGb38d60cbb [2021-10-28 23:25:08,437 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:25:08,438 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.c [2021-10-28 23:25:08,446 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/data/ba9f16358/c4d2ac80fadd425182688868176122a6/FLAGb38d60cbb [2021-10-28 23:25:08,800 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/data/ba9f16358/c4d2ac80fadd425182688868176122a6 [2021-10-28 23:25:08,803 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:25:08,804 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:25:08,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:25:08,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:25:08,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:25:08,813 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:25:08" (1/1) ... [2021-10-28 23:25:08,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@130ea96e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:08, skipping insertion in model container [2021-10-28 23:25:08,817 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:25:08" (1/1) ... [2021-10-28 23:25:08,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:25:08,849 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:25:09,017 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_39b45d18-6041-49d9-b491-4bb1f0039f29/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.c[535,548] [2021-10-28 23:25:09,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:25:09,051 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:25:09,066 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_39b45d18-6041-49d9-b491-4bb1f0039f29/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.c[535,548] [2021-10-28 23:25:09,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:25:09,096 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:25:09,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:09 WrapperNode [2021-10-28 23:25:09,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:25:09,099 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:25:09,099 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:25:09,099 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:25:09,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:09" (1/1) ... [2021-10-28 23:25:09,121 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:09" (1/1) ... [2021-10-28 23:25:09,147 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:25:09,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:25:09,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:25:09,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:25:09,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:09" (1/1) ... [2021-10-28 23:25:09,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:09" (1/1) ... [2021-10-28 23:25:09,161 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:09" (1/1) ... [2021-10-28 23:25:09,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:09" (1/1) ... [2021-10-28 23:25:09,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:09" (1/1) ... [2021-10-28 23:25:09,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:09" (1/1) ... [2021-10-28 23:25:09,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:09" (1/1) ... [2021-10-28 23:25:09,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:25:09,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:25:09,181 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:25:09,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:25:09,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:09" (1/1) ... [2021-10-28 23:25:09,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:25:09,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:09,220 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:25:09,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:25:09,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:25:09,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:25:09,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:25:09,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:25:09,479 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:25:09,479 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-10-28 23:25:09,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:25:09 BoogieIcfgContainer [2021-10-28 23:25:09,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:25:09,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:25:09,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:25:09,488 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:25:09,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:25:08" (1/3) ... [2021-10-28 23:25:09,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e18ee81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:25:09, skipping insertion in model container [2021-10-28 23:25:09,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:09" (2/3) ... [2021-10-28 23:25:09,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e18ee81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:25:09, skipping insertion in model container [2021-10-28 23:25:09,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:25:09" (3/3) ... [2021-10-28 23:25:09,491 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound20.c [2021-10-28 23:25:09,497 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:25:09,497 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-10-28 23:25:09,539 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:25:09,546 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 [2021-10-28 23:25:09,546 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-28 23:25:09,563 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 31 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:09,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 23:25:09,568 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:09,569 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:09,570 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:09,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:09,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1233832305, now seen corresponding path program 1 times [2021-10-28 23:25:09,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:09,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727356296] [2021-10-28 23:25:09,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:09,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:09,665 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:09,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [106799930] [2021-10-28 23:25:09,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:09,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:09,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:09,668 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:09,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:25:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:09,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-28 23:25:09,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:09,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:09,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727356296] [2021-10-28 23:25:09,839 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:09,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106799930] [2021-10-28 23:25:09,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106799930] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:25:09,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:25:09,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 23:25:09,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217542557] [2021-10-28 23:25:09,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 23:25:09,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:09,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 23:25:09,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:25:09,869 INFO L87 Difference]: Start difference. First operand has 32 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 31 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-10-28 23:25:09,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:09,890 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2021-10-28 23:25:09,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 23:25:09,892 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-28 23:25:09,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:09,902 INFO L225 Difference]: With dead ends: 61 [2021-10-28 23:25:09,902 INFO L226 Difference]: Without dead ends: 28 [2021-10-28 23:25:09,905 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:25:09,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-28 23:25:09,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-28 23:25:09,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.375) internal successors, (33), 27 states have internal predecessors, (33), 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) [2021-10-28 23:25:09,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-28 23:25:09,946 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 10 [2021-10-28 23:25:09,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:09,947 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-28 23:25:09,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-10-28 23:25:09,948 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-28 23:25:09,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 23:25:09,949 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:09,949 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:09,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-28 23:25:10,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-28 23:25:10,175 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:10,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:10,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2021-10-28 23:25:10,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:10,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633820897] [2021-10-28 23:25:10,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:10,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:10,198 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:10,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908739536] [2021-10-28 23:25:10,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:10,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:10,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:10,210 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:10,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:25:10,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:10,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 23:25:10,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:10,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:10,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:10,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633820897] [2021-10-28 23:25:10,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:10,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908739536] [2021-10-28 23:25:10,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908739536] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:25:10,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:25:10,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:25:10,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006335433] [2021-10-28 23:25:10,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:25:10,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:10,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:25:10,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:25:10,612 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-28 23:25:14,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:14,490 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2021-10-28 23:25:14,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:25:14,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-28 23:25:14,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:14,493 INFO L225 Difference]: With dead ends: 60 [2021-10-28 23:25:14,493 INFO L226 Difference]: Without dead ends: 54 [2021-10-28 23:25:14,494 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:25:14,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-28 23:25:14,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2021-10-28 23:25:14,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 39 states have internal predecessors, (51), 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) [2021-10-28 23:25:14,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-10-28 23:25:14,519 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 10 [2021-10-28 23:25:14,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:14,520 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-10-28 23:25:14,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-28 23:25:14,521 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-10-28 23:25:14,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 23:25:14,522 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:14,522 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:14,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:14,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:14,750 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:14,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:14,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1507375428, now seen corresponding path program 1 times [2021-10-28 23:25:14,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:14,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398510114] [2021-10-28 23:25:14,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:14,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:14,780 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:14,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203533160] [2021-10-28 23:25:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:14,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:14,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:14,787 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:14,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:25:14,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:14,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 23:25:14,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:14,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:14,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398510114] [2021-10-28 23:25:14,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:14,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203533160] [2021-10-28 23:25:14,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203533160] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:25:14,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:25:14,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:25:14,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715134028] [2021-10-28 23:25:14,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:25:14,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:14,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:25:14,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:25:14,895 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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) [2021-10-28 23:25:14,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:14,914 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2021-10-28 23:25:14,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:25:14,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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 [2021-10-28 23:25:14,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:14,917 INFO L225 Difference]: With dead ends: 46 [2021-10-28 23:25:14,917 INFO L226 Difference]: Without dead ends: 42 [2021-10-28 23:25:14,918 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:25:14,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-28 23:25:14,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-28 23:25:14,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.394736842105263) internal successors, (53), 41 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) [2021-10-28 23:25:14,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2021-10-28 23:25:14,926 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 11 [2021-10-28 23:25:14,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:14,927 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2021-10-28 23:25:14,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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) [2021-10-28 23:25:14,927 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2021-10-28 23:25:14,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:25:14,928 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:14,928 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:14,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:15,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-28 23:25:15,145 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:15,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:15,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1189409771, now seen corresponding path program 1 times [2021-10-28 23:25:15,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:15,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225477118] [2021-10-28 23:25:15,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:15,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:15,158 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:15,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434851563] [2021-10-28 23:25:15,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:15,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:15,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:15,160 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:15,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:25:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:15,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 23:25:15,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:15,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:15,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225477118] [2021-10-28 23:25:15,479 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:15,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434851563] [2021-10-28 23:25:15,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434851563] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:25:15,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:25:15,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 23:25:15,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156565262] [2021-10-28 23:25:15,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:25:15,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:15,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:25:15,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:25:15,487 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-10-28 23:25:15,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:15,744 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2021-10-28 23:25:15,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:25:15,744 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-28 23:25:15,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:15,748 INFO L225 Difference]: With dead ends: 46 [2021-10-28 23:25:15,748 INFO L226 Difference]: Without dead ends: 36 [2021-10-28 23:25:15,749 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:25:15,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-28 23:25:15,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2021-10-28 23:25:15,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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) [2021-10-28 23:25:15,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-10-28 23:25:15,765 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 13 [2021-10-28 23:25:15,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:15,765 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-10-28 23:25:15,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-10-28 23:25:15,766 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-10-28 23:25:15,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 23:25:15,769 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:15,769 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:15,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:15,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:15,989 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:15,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:15,990 INFO L85 PathProgramCache]: Analyzing trace with hash -112841942, now seen corresponding path program 1 times [2021-10-28 23:25:15,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:15,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303805239] [2021-10-28 23:25:15,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:15,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:16,004 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:16,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327085923] [2021-10-28 23:25:16,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:16,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:16,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:16,006 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:16,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 23:25:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:16,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 23:25:16,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:16,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:16,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303805239] [2021-10-28 23:25:16,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:16,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327085923] [2021-10-28 23:25:16,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327085923] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:25:16,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:25:16,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:25:16,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000305476] [2021-10-28 23:25:16,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:25:16,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:16,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:25:16,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:25:16,184 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2021-10-28 23:25:16,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:16,207 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-10-28 23:25:16,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:25:16,207 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 [2021-10-28 23:25:16,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:16,208 INFO L225 Difference]: With dead ends: 44 [2021-10-28 23:25:16,208 INFO L226 Difference]: Without dead ends: 28 [2021-10-28 23:25:16,209 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:25:16,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-28 23:25:16,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-28 23:25:16,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 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) [2021-10-28 23:25:16,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-10-28 23:25:16,216 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2021-10-28 23:25:16,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:16,216 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-10-28 23:25:16,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2021-10-28 23:25:16,217 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-10-28 23:25:16,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 23:25:16,218 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:16,218 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:16,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-28 23:25:16,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:16,446 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:16,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:16,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1045325853, now seen corresponding path program 1 times [2021-10-28 23:25:16,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:16,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727562050] [2021-10-28 23:25:16,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:16,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:16,459 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:16,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37078765] [2021-10-28 23:25:16,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:16,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:16,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:16,461 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:16,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 23:25:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:16,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:25:16,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:16,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:16,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:16,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727562050] [2021-10-28 23:25:16,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:16,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37078765] [2021-10-28 23:25:16,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37078765] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:25:16,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:25:16,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:25:16,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875876195] [2021-10-28 23:25:16,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:25:16,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:16,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:25:16,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:25:16,681 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 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) [2021-10-28 23:25:16,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:16,716 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2021-10-28 23:25:16,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:25:16,717 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 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 21 [2021-10-28 23:25:16,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:16,721 INFO L225 Difference]: With dead ends: 49 [2021-10-28 23:25:16,721 INFO L226 Difference]: Without dead ends: 33 [2021-10-28 23:25:16,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:25:16,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-28 23:25:16,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-10-28 23:25:16,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:16,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-10-28 23:25:16,730 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 21 [2021-10-28 23:25:16,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:16,731 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-10-28 23:25:16,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 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) [2021-10-28 23:25:16,731 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-10-28 23:25:16,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 23:25:16,732 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:16,732 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:16,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:16,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:16,958 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:16,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:16,959 INFO L85 PathProgramCache]: Analyzing trace with hash -944107012, now seen corresponding path program 1 times [2021-10-28 23:25:16,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:16,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114984614] [2021-10-28 23:25:16,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:16,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:16,972 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:16,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508378019] [2021-10-28 23:25:16,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:16,972 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:16,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:16,974 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:16,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 23:25:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:17,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 23:25:17,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:17,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:17,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:17,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114984614] [2021-10-28 23:25:17,169 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:17,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508378019] [2021-10-28 23:25:17,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508378019] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:25:17,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:25:17,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:25:17,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221190272] [2021-10-28 23:25:17,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:25:17,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:17,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:25:17,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:25:17,173 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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) [2021-10-28 23:25:17,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:17,237 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2021-10-28 23:25:17,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:25:17,237 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 [2021-10-28 23:25:17,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:17,239 INFO L225 Difference]: With dead ends: 80 [2021-10-28 23:25:17,239 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 23:25:17,241 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:25:17,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 23:25:17,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2021-10-28 23:25:17,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 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) [2021-10-28 23:25:17,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2021-10-28 23:25:17,270 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 23 [2021-10-28 23:25:17,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:17,271 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2021-10-28 23:25:17,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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) [2021-10-28 23:25:17,271 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2021-10-28 23:25:17,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 23:25:17,272 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:17,272 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:17,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:17,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:17,487 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:17,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:17,488 INFO L85 PathProgramCache]: Analyzing trace with hash 2135520830, now seen corresponding path program 1 times [2021-10-28 23:25:17,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:17,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288702339] [2021-10-28 23:25:17,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:17,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:17,497 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:17,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230127424] [2021-10-28 23:25:17,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:17,498 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:17,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:17,501 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:17,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 23:25:17,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:17,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:25:17,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:17,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:17,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288702339] [2021-10-28 23:25:17,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:17,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230127424] [2021-10-28 23:25:17,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230127424] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:17,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:17,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-28 23:25:17,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992574541] [2021-10-28 23:25:17,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:25:17,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:17,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:25:17,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:25:17,702 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 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) [2021-10-28 23:25:17,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:17,741 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2021-10-28 23:25:17,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:25:17,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 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 [2021-10-28 23:25:17,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:17,742 INFO L225 Difference]: With dead ends: 82 [2021-10-28 23:25:17,742 INFO L226 Difference]: Without dead ends: 50 [2021-10-28 23:25:17,743 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:25:17,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-28 23:25:17,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-10-28 23:25:17,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 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) [2021-10-28 23:25:17,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-10-28 23:25:17,753 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 23 [2021-10-28 23:25:17,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:17,754 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-10-28 23:25:17,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 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) [2021-10-28 23:25:17,754 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-10-28 23:25:17,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-28 23:25:17,755 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:17,755 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:17,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:17,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:17,982 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:17,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:17,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1539131849, now seen corresponding path program 1 times [2021-10-28 23:25:17,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:17,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667387678] [2021-10-28 23:25:17,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:17,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:17,992 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:17,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [595794918] [2021-10-28 23:25:17,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:17,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:17,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:17,993 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:18,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 23:25:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:18,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 23:25:18,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:18,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:18,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:18,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667387678] [2021-10-28 23:25:18,209 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:18,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595794918] [2021-10-28 23:25:18,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595794918] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:18,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:18,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 23:25:18,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691932313] [2021-10-28 23:25:18,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:25:18,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:18,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:25:18,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:25:18,211 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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) [2021-10-28 23:25:18,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:18,266 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2021-10-28 23:25:18,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:25:18,267 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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 25 [2021-10-28 23:25:18,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:18,268 INFO L225 Difference]: With dead ends: 89 [2021-10-28 23:25:18,268 INFO L226 Difference]: Without dead ends: 57 [2021-10-28 23:25:18,269 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:25:18,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-28 23:25:18,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-10-28 23:25:18,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 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) [2021-10-28 23:25:18,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2021-10-28 23:25:18,290 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 25 [2021-10-28 23:25:18,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:18,292 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2021-10-28 23:25:18,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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) [2021-10-28 23:25:18,292 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2021-10-28 23:25:18,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 23:25:18,295 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:18,295 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:18,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:18,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-28 23:25:18,514 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:18,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:18,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1249700688, now seen corresponding path program 1 times [2021-10-28 23:25:18,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:18,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444429264] [2021-10-28 23:25:18,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:18,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:18,524 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:18,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592552077] [2021-10-28 23:25:18,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:18,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:18,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:18,526 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:18,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 23:25:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:18,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:25:18,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:18,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:18,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:18,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444429264] [2021-10-28 23:25:18,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:18,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592552077] [2021-10-28 23:25:18,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592552077] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:18,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:18,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 23:25:18,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058566972] [2021-10-28 23:25:18,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:25:18,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:18,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:25:18,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:25:18,765 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:18,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:18,813 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2021-10-28 23:25:18,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:25:18,814 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-28 23:25:18,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:18,815 INFO L225 Difference]: With dead ends: 70 [2021-10-28 23:25:18,815 INFO L226 Difference]: Without dead ends: 66 [2021-10-28 23:25:18,815 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:25:18,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-28 23:25:18,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-10-28 23:25:18,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 59 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) [2021-10-28 23:25:18,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2021-10-28 23:25:18,828 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 27 [2021-10-28 23:25:18,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:18,828 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2021-10-28 23:25:18,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:18,829 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2021-10-28 23:25:18,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 23:25:18,830 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:18,830 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:18,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:19,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 23:25:19,051 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:19,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:19,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1841895250, now seen corresponding path program 2 times [2021-10-28 23:25:19,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:19,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243240203] [2021-10-28 23:25:19,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:19,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:19,062 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:19,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852726921] [2021-10-28 23:25:19,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:25:19,062 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:19,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:19,064 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:19,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 23:25:19,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:25:19,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:19,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 23:25:19,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:19,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:19,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:19,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243240203] [2021-10-28 23:25:19,441 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:19,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852726921] [2021-10-28 23:25:19,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852726921] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:19,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:19,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 23:25:19,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976900651] [2021-10-28 23:25:19,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:25:19,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:19,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:25:19,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:25:19,443 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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) [2021-10-28 23:25:19,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:19,505 INFO L93 Difference]: Finished difference Result 94 states and 116 transitions. [2021-10-28 23:25:19,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:25:19,506 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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 27 [2021-10-28 23:25:19,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:19,507 INFO L225 Difference]: With dead ends: 94 [2021-10-28 23:25:19,507 INFO L226 Difference]: Without dead ends: 62 [2021-10-28 23:25:19,508 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:25:19,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-28 23:25:19,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-28 23:25:19,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 61 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) [2021-10-28 23:25:19,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2021-10-28 23:25:19,519 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 27 [2021-10-28 23:25:19,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:19,520 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2021-10-28 23:25:19,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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) [2021-10-28 23:25:19,520 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2021-10-28 23:25:19,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 23:25:19,521 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:19,521 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:19,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:19,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-28 23:25:19,727 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:19,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:19,727 INFO L85 PathProgramCache]: Analyzing trace with hash -2118874485, now seen corresponding path program 2 times [2021-10-28 23:25:19,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:19,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550755555] [2021-10-28 23:25:19,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:19,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:19,736 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:19,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [705750434] [2021-10-28 23:25:19,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:25:19,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:19,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:19,737 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:19,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 23:25:19,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:25:19,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:19,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:25:19,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:19,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:19,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:19,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550755555] [2021-10-28 23:25:19,994 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:19,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705750434] [2021-10-28 23:25:19,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705750434] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:19,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:19,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 23:25:19,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781823139] [2021-10-28 23:25:19,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:25:19,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:19,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:25:19,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:25:19,996 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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) [2021-10-28 23:25:20,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:20,053 INFO L93 Difference]: Finished difference Result 99 states and 122 transitions. [2021-10-28 23:25:20,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:25:20,053 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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) Word has length 29 [2021-10-28 23:25:20,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:20,054 INFO L225 Difference]: With dead ends: 99 [2021-10-28 23:25:20,054 INFO L226 Difference]: Without dead ends: 67 [2021-10-28 23:25:20,055 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:25:20,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-28 23:25:20,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2021-10-28 23:25:20,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 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) [2021-10-28 23:25:20,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2021-10-28 23:25:20,066 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 29 [2021-10-28 23:25:20,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:20,066 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2021-10-28 23:25:20,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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) [2021-10-28 23:25:20,066 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2021-10-28 23:25:20,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 23:25:20,067 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:20,067 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:20,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:20,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 23:25:20,292 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:20,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:20,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1832191324, now seen corresponding path program 2 times [2021-10-28 23:25:20,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:20,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690547021] [2021-10-28 23:25:20,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:20,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:20,301 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:20,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203379361] [2021-10-28 23:25:20,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:25:20,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:20,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:20,303 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:20,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 23:25:20,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:25:20,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:20,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 23:25:20,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:20,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:20,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690547021] [2021-10-28 23:25:20,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:20,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203379361] [2021-10-28 23:25:20,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203379361] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:20,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:20,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 23:25:20,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031481341] [2021-10-28 23:25:20,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:25:20,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:20,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:25:20,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:25:20,588 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 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) [2021-10-28 23:25:20,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:20,651 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2021-10-28 23:25:20,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:25:20,652 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 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 [2021-10-28 23:25:20,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:20,653 INFO L225 Difference]: With dead ends: 83 [2021-10-28 23:25:20,653 INFO L226 Difference]: Without dead ends: 79 [2021-10-28 23:25:20,654 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:25:20,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-28 23:25:20,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2021-10-28 23:25:20,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 67 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:20,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2021-10-28 23:25:20,669 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 31 [2021-10-28 23:25:20,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:20,669 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2021-10-28 23:25:20,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 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) [2021-10-28 23:25:20,670 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2021-10-28 23:25:20,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 23:25:20,672 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:20,673 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:20,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:20,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:20,892 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:20,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:20,893 INFO L85 PathProgramCache]: Analyzing trace with hash -492171674, now seen corresponding path program 3 times [2021-10-28 23:25:20,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:20,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801110945] [2021-10-28 23:25:20,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:20,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:20,905 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:20,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606867532] [2021-10-28 23:25:20,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:25:20,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:20,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:20,913 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:20,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 23:25:21,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-28 23:25:21,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:21,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:25:21,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:21,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:21,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801110945] [2021-10-28 23:25:21,461 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:21,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606867532] [2021-10-28 23:25:21,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606867532] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:21,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:21,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 23:25:21,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550097460] [2021-10-28 23:25:21,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:25:21,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:21,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:25:21,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:25:21,462 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 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) [2021-10-28 23:25:21,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:21,539 INFO L93 Difference]: Finished difference Result 103 states and 127 transitions. [2021-10-28 23:25:21,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:25:21,540 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 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 [2021-10-28 23:25:21,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:21,541 INFO L225 Difference]: With dead ends: 103 [2021-10-28 23:25:21,541 INFO L226 Difference]: Without dead ends: 71 [2021-10-28 23:25:21,541 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:25:21,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-28 23:25:21,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-10-28 23:25:21,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 69 states have internal predecessors, (84), 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) [2021-10-28 23:25:21,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2021-10-28 23:25:21,554 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 31 [2021-10-28 23:25:21,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:21,554 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2021-10-28 23:25:21,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 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) [2021-10-28 23:25:21,554 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2021-10-28 23:25:21,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-28 23:25:21,555 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:21,555 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:21,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:21,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:21,766 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:21,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:21,767 INFO L85 PathProgramCache]: Analyzing trace with hash -289663777, now seen corresponding path program 3 times [2021-10-28 23:25:21,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:21,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926473105] [2021-10-28 23:25:21,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:21,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:21,776 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:21,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577046495] [2021-10-28 23:25:21,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:25:21,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:21,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:21,777 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:21,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 23:25:22,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-28 23:25:22,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:22,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 23:25:22,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:22,268 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:22,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:22,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926473105] [2021-10-28 23:25:22,269 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:22,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577046495] [2021-10-28 23:25:22,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577046495] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:22,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:22,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 23:25:22,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230915710] [2021-10-28 23:25:22,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:25:22,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:22,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:25:22,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:25:22,272 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 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) [2021-10-28 23:25:22,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:22,364 INFO L93 Difference]: Finished difference Result 112 states and 137 transitions. [2021-10-28 23:25:22,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:25:22,365 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 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 33 [2021-10-28 23:25:22,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:22,366 INFO L225 Difference]: With dead ends: 112 [2021-10-28 23:25:22,366 INFO L226 Difference]: Without dead ends: 80 [2021-10-28 23:25:22,367 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:25:22,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-28 23:25:22,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2021-10-28 23:25:22,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 73 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) [2021-10-28 23:25:22,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2021-10-28 23:25:22,381 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 33 [2021-10-28 23:25:22,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:22,381 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2021-10-28 23:25:22,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 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) [2021-10-28 23:25:22,382 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2021-10-28 23:25:22,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 23:25:22,382 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:22,383 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:22,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:22,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 23:25:22,588 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:22,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:22,589 INFO L85 PathProgramCache]: Analyzing trace with hash 122158014, now seen corresponding path program 1 times [2021-10-28 23:25:22,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:22,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698193698] [2021-10-28 23:25:22,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:22,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:22,599 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:22,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [612897865] [2021-10-28 23:25:22,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:22,600 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:22,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:22,606 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:22,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 23:25:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:22,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 23:25:22,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:22,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:22,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698193698] [2021-10-28 23:25:22,966 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:22,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612897865] [2021-10-28 23:25:22,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612897865] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:22,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:22,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 23:25:22,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887756160] [2021-10-28 23:25:22,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:25:22,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:22,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:25:22,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:25:22,969 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:23,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:23,062 INFO L93 Difference]: Finished difference Result 114 states and 140 transitions. [2021-10-28 23:25:23,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:25:23,063 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-28 23:25:23,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:23,064 INFO L225 Difference]: With dead ends: 114 [2021-10-28 23:25:23,065 INFO L226 Difference]: Without dead ends: 82 [2021-10-28 23:25:23,065 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:25:23,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-28 23:25:23,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-10-28 23:25:23,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 81 states have internal predecessors, (97), 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) [2021-10-28 23:25:23,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2021-10-28 23:25:23,080 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 35 [2021-10-28 23:25:23,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:23,081 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2021-10-28 23:25:23,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:23,082 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2021-10-28 23:25:23,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 23:25:23,083 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:23,083 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:23,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:23,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 23:25:23,310 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:23,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:23,311 INFO L85 PathProgramCache]: Analyzing trace with hash -602325000, now seen corresponding path program 3 times [2021-10-28 23:25:23,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:23,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986314823] [2021-10-28 23:25:23,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:23,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:23,322 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:23,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480555942] [2021-10-28 23:25:23,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:25:23,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:23,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:23,324 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:23,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 23:25:23,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-28 23:25:23,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:23,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 23:25:23,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:23,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:23,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986314823] [2021-10-28 23:25:23,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:23,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480555942] [2021-10-28 23:25:23,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480555942] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:23,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:23,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-28 23:25:23,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985342444] [2021-10-28 23:25:23,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:25:23,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:23,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:25:23,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:25:23,757 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:23,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:23,852 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2021-10-28 23:25:23,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:25:23,853 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-28 23:25:23,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:23,854 INFO L225 Difference]: With dead ends: 100 [2021-10-28 23:25:23,854 INFO L226 Difference]: Without dead ends: 96 [2021-10-28 23:25:23,855 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:25:23,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-28 23:25:23,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2021-10-28 23:25:23,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 83 states have internal predecessors, (100), 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) [2021-10-28 23:25:23,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2021-10-28 23:25:23,870 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 35 [2021-10-28 23:25:23,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:23,870 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2021-10-28 23:25:23,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:23,871 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2021-10-28 23:25:23,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-28 23:25:23,872 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:23,873 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:23,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:24,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 23:25:24,098 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:24,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:24,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1451332471, now seen corresponding path program 1 times [2021-10-28 23:25:24,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:24,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508911931] [2021-10-28 23:25:24,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:24,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:24,106 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:24,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800173724] [2021-10-28 23:25:24,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:24,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:24,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:24,108 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:24,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 23:25:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:24,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 23:25:24,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 23:25:24,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:24,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508911931] [2021-10-28 23:25:24,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:24,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800173724] [2021-10-28 23:25:24,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800173724] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:25:24,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:25:24,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:25:24,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092814534] [2021-10-28 23:25:24,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:25:24,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:24,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:25:24,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:25:24,458 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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) [2021-10-28 23:25:24,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:24,507 INFO L93 Difference]: Finished difference Result 140 states and 169 transitions. [2021-10-28 23:25:24,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:25:24,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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) Word has length 37 [2021-10-28 23:25:24,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:24,509 INFO L225 Difference]: With dead ends: 140 [2021-10-28 23:25:24,509 INFO L226 Difference]: Without dead ends: 108 [2021-10-28 23:25:24,509 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:25:24,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-28 23:25:24,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 96. [2021-10-28 23:25:24,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 95 states have internal predecessors, (115), 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) [2021-10-28 23:25:24,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 115 transitions. [2021-10-28 23:25:24,525 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 115 transitions. Word has length 37 [2021-10-28 23:25:24,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:24,525 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 115 transitions. [2021-10-28 23:25:24,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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) [2021-10-28 23:25:24,526 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 115 transitions. [2021-10-28 23:25:24,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-28 23:25:24,527 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:24,527 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:24,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:24,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 23:25:24,746 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:24,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:24,746 INFO L85 PathProgramCache]: Analyzing trace with hash 495867187, now seen corresponding path program 4 times [2021-10-28 23:25:24,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:24,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357862871] [2021-10-28 23:25:24,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:24,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:24,763 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:24,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648429630] [2021-10-28 23:25:24,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:25:24,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:24,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:24,771 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:24,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 23:25:24,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:25:24,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:24,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 23:25:24,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:25,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:25,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357862871] [2021-10-28 23:25:25,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:25,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648429630] [2021-10-28 23:25:25,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648429630] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:25,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:25,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-28 23:25:25,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437802682] [2021-10-28 23:25:25,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:25:25,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:25,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:25:25,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:25:25,180 INFO L87 Difference]: Start difference. First operand 96 states and 115 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:25,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:25,293 INFO L93 Difference]: Finished difference Result 152 states and 185 transitions. [2021-10-28 23:25:25,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 23:25:25,294 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-28 23:25:25,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:25,295 INFO L225 Difference]: With dead ends: 152 [2021-10-28 23:25:25,295 INFO L226 Difference]: Without dead ends: 108 [2021-10-28 23:25:25,296 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:25:25,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-28 23:25:25,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2021-10-28 23:25:25,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 99 states have internal predecessors, (120), 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) [2021-10-28 23:25:25,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 120 transitions. [2021-10-28 23:25:25,313 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 120 transitions. Word has length 37 [2021-10-28 23:25:25,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:25,314 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 120 transitions. [2021-10-28 23:25:25,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:25,314 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 120 transitions. [2021-10-28 23:25:25,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 23:25:25,315 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:25,315 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:25,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:25,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:25,521 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:25,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:25,521 INFO L85 PathProgramCache]: Analyzing trace with hash 537451730, now seen corresponding path program 1 times [2021-10-28 23:25:25,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:25,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972426330] [2021-10-28 23:25:25,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:25,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:25,534 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:25,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585900469] [2021-10-28 23:25:25,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:25,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:25,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:25,537 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:25,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 23:25:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:25,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 23:25:25,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:26,017 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:26,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:26,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972426330] [2021-10-28 23:25:26,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:26,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585900469] [2021-10-28 23:25:26,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585900469] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:26,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:26,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-28 23:25:26,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760558931] [2021-10-28 23:25:26,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:25:26,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:26,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:25:26,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:25:26,020 INFO L87 Difference]: Start difference. First operand 100 states and 120 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 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) [2021-10-28 23:25:26,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:26,153 INFO L93 Difference]: Finished difference Result 154 states and 188 transitions. [2021-10-28 23:25:26,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 23:25:26,154 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 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 [2021-10-28 23:25:26,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:26,155 INFO L225 Difference]: With dead ends: 154 [2021-10-28 23:25:26,155 INFO L226 Difference]: Without dead ends: 110 [2021-10-28 23:25:26,156 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:25:26,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-28 23:25:26,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-10-28 23:25:26,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.1926605504587156) internal successors, (130), 109 states have internal predecessors, (130), 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) [2021-10-28 23:25:26,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 130 transitions. [2021-10-28 23:25:26,174 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 130 transitions. Word has length 39 [2021-10-28 23:25:26,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:26,175 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 130 transitions. [2021-10-28 23:25:26,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 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) [2021-10-28 23:25:26,175 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 130 transitions. [2021-10-28 23:25:26,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 23:25:26,176 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:26,176 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:26,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:26,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:26,391 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:26,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:26,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1621312692, now seen corresponding path program 4 times [2021-10-28 23:25:26,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:26,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754375304] [2021-10-28 23:25:26,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:26,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:26,400 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:26,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474978301] [2021-10-28 23:25:26,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:25:26,401 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:26,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:26,403 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:26,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 23:25:26,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:25:26,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:26,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 23:25:26,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:26,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:26,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754375304] [2021-10-28 23:25:26,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:26,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474978301] [2021-10-28 23:25:26,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474978301] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:26,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:26,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-28 23:25:26,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334876158] [2021-10-28 23:25:26,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 23:25:26,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:26,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 23:25:26,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:25:26,854 INFO L87 Difference]: Start difference. First operand 110 states and 130 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 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) [2021-10-28 23:25:26,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:26,945 INFO L93 Difference]: Finished difference Result 127 states and 149 transitions. [2021-10-28 23:25:26,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 23:25:26,946 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 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 [2021-10-28 23:25:26,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:26,947 INFO L225 Difference]: With dead ends: 127 [2021-10-28 23:25:26,947 INFO L226 Difference]: Without dead ends: 123 [2021-10-28 23:25:26,948 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:25:26,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-28 23:25:26,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2021-10-28 23:25:26,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.1981981981981982) internal successors, (133), 111 states have internal predecessors, (133), 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) [2021-10-28 23:25:26,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2021-10-28 23:25:26,964 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 39 [2021-10-28 23:25:26,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:26,964 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2021-10-28 23:25:26,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 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) [2021-10-28 23:25:26,964 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2021-10-28 23:25:26,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-28 23:25:26,965 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:26,965 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:27,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:27,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-28 23:25:27,190 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:27,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:27,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1116635019, now seen corresponding path program 1 times [2021-10-28 23:25:27,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:27,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192754889] [2021-10-28 23:25:27,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:27,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:27,202 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:27,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1055001680] [2021-10-28 23:25:27,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:27,203 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:27,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:27,204 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:27,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 23:25:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:27,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 23:25:27,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:27,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:27,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192754889] [2021-10-28 23:25:27,722 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:27,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055001680] [2021-10-28 23:25:27,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055001680] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:27,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:27,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-28 23:25:27,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750087464] [2021-10-28 23:25:27,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 23:25:27,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:27,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 23:25:27,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:25:27,724 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:27,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:27,864 INFO L93 Difference]: Finished difference Result 168 states and 203 transitions. [2021-10-28 23:25:27,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 23:25:27,867 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-28 23:25:27,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:27,868 INFO L225 Difference]: With dead ends: 168 [2021-10-28 23:25:27,868 INFO L226 Difference]: Without dead ends: 124 [2021-10-28 23:25:27,869 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:25:27,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-28 23:25:27,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 116. [2021-10-28 23:25:27,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.2) internal successors, (138), 115 states have internal predecessors, (138), 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) [2021-10-28 23:25:27,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 138 transitions. [2021-10-28 23:25:27,886 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 138 transitions. Word has length 41 [2021-10-28 23:25:27,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:27,887 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 138 transitions. [2021-10-28 23:25:27,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:27,887 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 138 transitions. [2021-10-28 23:25:27,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-28 23:25:27,888 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:27,888 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:27,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:28,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:28,114 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:28,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:28,115 INFO L85 PathProgramCache]: Analyzing trace with hash -2063880284, now seen corresponding path program 1 times [2021-10-28 23:25:28,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:28,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719619588] [2021-10-28 23:25:28,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:28,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:28,123 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:28,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381298960] [2021-10-28 23:25:28,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:28,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:28,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:28,125 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:28,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 23:25:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:28,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 23:25:28,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:28,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:28,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719619588] [2021-10-28 23:25:28,660 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:28,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381298960] [2021-10-28 23:25:28,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381298960] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:28,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:28,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-28 23:25:28,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720342145] [2021-10-28 23:25:28,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:25:28,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:28,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:25:28,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:25:28,662 INFO L87 Difference]: Start difference. First operand 116 states and 138 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 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) [2021-10-28 23:25:28,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:28,834 INFO L93 Difference]: Finished difference Result 144 states and 170 transitions. [2021-10-28 23:25:28,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 23:25:28,835 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 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 [2021-10-28 23:25:28,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:28,836 INFO L225 Difference]: With dead ends: 144 [2021-10-28 23:25:28,836 INFO L226 Difference]: Without dead ends: 140 [2021-10-28 23:25:28,837 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:25:28,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-28 23:25:28,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 118. [2021-10-28 23:25:28,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.205128205128205) internal successors, (141), 117 states have internal predecessors, (141), 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) [2021-10-28 23:25:28,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 141 transitions. [2021-10-28 23:25:28,856 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 141 transitions. Word has length 43 [2021-10-28 23:25:28,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:28,857 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 141 transitions. [2021-10-28 23:25:28,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 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) [2021-10-28 23:25:28,857 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 141 transitions. [2021-10-28 23:25:28,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-28 23:25:28,858 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:28,858 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:28,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:29,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-28 23:25:29,082 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:29,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:29,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1015747558, now seen corresponding path program 2 times [2021-10-28 23:25:29,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:29,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065282011] [2021-10-28 23:25:29,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:29,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:29,091 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:29,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153503325] [2021-10-28 23:25:29,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:25:29,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:29,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:29,094 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:29,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 23:25:29,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:25:29,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:29,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 23:25:29,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:29,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:29,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065282011] [2021-10-28 23:25:29,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:29,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153503325] [2021-10-28 23:25:29,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153503325] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:29,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:29,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-28 23:25:29,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648982377] [2021-10-28 23:25:29,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 23:25:29,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:29,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 23:25:29,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:25:29,569 INFO L87 Difference]: Start difference. First operand 118 states and 141 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 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) [2021-10-28 23:25:29,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:29,695 INFO L93 Difference]: Finished difference Result 173 states and 210 transitions. [2021-10-28 23:25:29,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 23:25:29,696 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 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 [2021-10-28 23:25:29,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:29,697 INFO L225 Difference]: With dead ends: 173 [2021-10-28 23:25:29,697 INFO L226 Difference]: Without dead ends: 129 [2021-10-28 23:25:29,697 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:25:29,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-10-28 23:25:29,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2021-10-28 23:25:29,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.188976377952756) internal successors, (151), 127 states have internal predecessors, (151), 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) [2021-10-28 23:25:29,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 151 transitions. [2021-10-28 23:25:29,713 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 151 transitions. Word has length 43 [2021-10-28 23:25:29,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:29,713 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 151 transitions. [2021-10-28 23:25:29,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 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) [2021-10-28 23:25:29,713 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 151 transitions. [2021-10-28 23:25:29,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 23:25:29,714 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:29,714 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:29,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:29,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 23:25:29,930 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:29,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:29,931 INFO L85 PathProgramCache]: Analyzing trace with hash 395545055, now seen corresponding path program 2 times [2021-10-28 23:25:29,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:29,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975855405] [2021-10-28 23:25:29,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:29,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:29,937 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:29,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335702330] [2021-10-28 23:25:29,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:25:29,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:29,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:29,942 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:29,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-28 23:25:30,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:25:30,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:30,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:25:30,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:30,386 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 23:25:30,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:30,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975855405] [2021-10-28 23:25:30,387 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:30,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335702330] [2021-10-28 23:25:30,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335702330] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:30,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:30,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-28 23:25:30,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962250326] [2021-10-28 23:25:30,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:25:30,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:30,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:25:30,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:25:30,389 INFO L87 Difference]: Start difference. First operand 128 states and 151 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:30,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:30,509 INFO L93 Difference]: Finished difference Result 336 states and 400 transitions. [2021-10-28 23:25:30,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:25:30,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-10-28 23:25:30,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:30,512 INFO L225 Difference]: With dead ends: 336 [2021-10-28 23:25:30,512 INFO L226 Difference]: Without dead ends: 256 [2021-10-28 23:25:30,513 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:25:30,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-10-28 23:25:30,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 242. [2021-10-28 23:25:30,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.1991701244813278) internal successors, (289), 241 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) [2021-10-28 23:25:30,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 289 transitions. [2021-10-28 23:25:30,543 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 289 transitions. Word has length 45 [2021-10-28 23:25:30,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:30,544 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 289 transitions. [2021-10-28 23:25:30,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:30,544 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 289 transitions. [2021-10-28 23:25:30,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 23:25:30,545 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:30,545 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:30,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:30,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 23:25:30,770 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:30,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:30,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1197425055, now seen corresponding path program 3 times [2021-10-28 23:25:30,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:30,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649670069] [2021-10-28 23:25:30,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:30,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:30,779 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:30,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589610061] [2021-10-28 23:25:30,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:25:30,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:30,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:30,782 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:30,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-28 23:25:31,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 23:25:31,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:31,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 23:25:31,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:31,341 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:31,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:31,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649670069] [2021-10-28 23:25:31,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:31,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589610061] [2021-10-28 23:25:31,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589610061] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:31,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:31,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-28 23:25:31,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780889841] [2021-10-28 23:25:31,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:25:31,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:31,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:25:31,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:25:31,343 INFO L87 Difference]: Start difference. First operand 242 states and 289 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 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) [2021-10-28 23:25:31,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:31,522 INFO L93 Difference]: Finished difference Result 372 states and 455 transitions. [2021-10-28 23:25:31,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 23:25:31,522 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 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 [2021-10-28 23:25:31,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:31,524 INFO L225 Difference]: With dead ends: 372 [2021-10-28 23:25:31,525 INFO L226 Difference]: Without dead ends: 268 [2021-10-28 23:25:31,525 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:25:31,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-10-28 23:25:31,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 252. [2021-10-28 23:25:31,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.199203187250996) internal successors, (301), 251 states have internal predecessors, (301), 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) [2021-10-28 23:25:31,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 301 transitions. [2021-10-28 23:25:31,566 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 301 transitions. Word has length 45 [2021-10-28 23:25:31,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:31,566 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 301 transitions. [2021-10-28 23:25:31,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 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) [2021-10-28 23:25:31,567 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 301 transitions. [2021-10-28 23:25:31,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 23:25:31,569 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:31,569 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:31,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:31,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-28 23:25:31,776 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:31,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:31,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1734067016, now seen corresponding path program 2 times [2021-10-28 23:25:31,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:31,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081413909] [2021-10-28 23:25:31,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:31,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:31,783 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:31,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [614003200] [2021-10-28 23:25:31,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:25:31,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:31,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:31,786 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:31,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-28 23:25:32,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:25:32,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:32,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 23:25:32,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:32,322 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:32,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:32,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081413909] [2021-10-28 23:25:32,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:32,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614003200] [2021-10-28 23:25:32,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614003200] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:32,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:32,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-28 23:25:32,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152660409] [2021-10-28 23:25:32,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 23:25:32,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:32,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 23:25:32,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:25:32,324 INFO L87 Difference]: Start difference. First operand 252 states and 301 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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) [2021-10-28 23:25:32,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:32,511 INFO L93 Difference]: Finished difference Result 307 states and 365 transitions. [2021-10-28 23:25:32,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 23:25:32,512 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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 [2021-10-28 23:25:32,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:32,515 INFO L225 Difference]: With dead ends: 307 [2021-10-28 23:25:32,515 INFO L226 Difference]: Without dead ends: 303 [2021-10-28 23:25:32,516 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:25:32,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-10-28 23:25:32,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 254. [2021-10-28 23:25:32,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.2055335968379446) internal successors, (305), 253 states have internal predecessors, (305), 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) [2021-10-28 23:25:32,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 305 transitions. [2021-10-28 23:25:32,549 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 305 transitions. Word has length 47 [2021-10-28 23:25:32,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:32,549 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 305 transitions. [2021-10-28 23:25:32,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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) [2021-10-28 23:25:32,549 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 305 transitions. [2021-10-28 23:25:32,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 23:25:32,550 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:32,551 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:32,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-10-28 23:25:32,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:32,766 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:32,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:32,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1345560826, now seen corresponding path program 3 times [2021-10-28 23:25:32,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:32,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101106694] [2021-10-28 23:25:32,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:32,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:32,774 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:32,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117818906] [2021-10-28 23:25:32,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:25:32,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:32,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:32,776 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:32,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-28 23:25:33,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-28 23:25:33,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:33,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 23:25:33,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:33,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:33,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101106694] [2021-10-28 23:25:33,391 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:33,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117818906] [2021-10-28 23:25:33,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117818906] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:33,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:33,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-28 23:25:33,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81542657] [2021-10-28 23:25:33,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:25:33,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:33,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:25:33,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:25:33,392 INFO L87 Difference]: Start difference. First operand 254 states and 305 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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) [2021-10-28 23:25:33,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:33,553 INFO L93 Difference]: Finished difference Result 360 states and 438 transitions. [2021-10-28 23:25:33,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 23:25:33,554 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 [2021-10-28 23:25:33,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:33,556 INFO L225 Difference]: With dead ends: 360 [2021-10-28 23:25:33,556 INFO L226 Difference]: Without dead ends: 280 [2021-10-28 23:25:33,557 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:25:33,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-10-28 23:25:33,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 274. [2021-10-28 23:25:33,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.1904761904761905) internal successors, (325), 273 states have internal predecessors, (325), 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) [2021-10-28 23:25:33,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 325 transitions. [2021-10-28 23:25:33,592 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 325 transitions. Word has length 47 [2021-10-28 23:25:33,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:33,593 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 325 transitions. [2021-10-28 23:25:33,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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) [2021-10-28 23:25:33,593 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 325 transitions. [2021-10-28 23:25:33,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-28 23:25:33,594 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:33,594 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:33,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:33,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 23:25:33,817 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:33,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:33,818 INFO L85 PathProgramCache]: Analyzing trace with hash -481484301, now seen corresponding path program 4 times [2021-10-28 23:25:33,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:33,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142534332] [2021-10-28 23:25:33,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:33,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:33,825 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:33,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1181492118] [2021-10-28 23:25:33,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:25:33,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:33,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:33,829 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:33,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-28 23:25:34,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:25:34,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:34,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 23:25:34,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:34,358 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:34,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:34,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142534332] [2021-10-28 23:25:34,358 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:34,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181492118] [2021-10-28 23:25:34,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181492118] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:34,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:34,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-28 23:25:34,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224339673] [2021-10-28 23:25:34,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 23:25:34,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:34,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 23:25:34,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:25:34,361 INFO L87 Difference]: Start difference. First operand 274 states and 325 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:34,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:34,549 INFO L93 Difference]: Finished difference Result 408 states and 495 transitions. [2021-10-28 23:25:34,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 23:25:34,549 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-10-28 23:25:34,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:34,552 INFO L225 Difference]: With dead ends: 408 [2021-10-28 23:25:34,552 INFO L226 Difference]: Without dead ends: 304 [2021-10-28 23:25:34,554 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-10-28 23:25:34,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-10-28 23:25:34,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 284. [2021-10-28 23:25:34,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.1908127208480566) internal successors, (337), 283 states have internal predecessors, (337), 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) [2021-10-28 23:25:34,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 337 transitions. [2021-10-28 23:25:34,591 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 337 transitions. Word has length 49 [2021-10-28 23:25:34,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:34,592 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 337 transitions. [2021-10-28 23:25:34,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:34,592 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 337 transitions. [2021-10-28 23:25:34,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 23:25:34,597 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:34,597 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:34,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:34,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 23:25:34,822 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:34,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:34,823 INFO L85 PathProgramCache]: Analyzing trace with hash -281596910, now seen corresponding path program 4 times [2021-10-28 23:25:34,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:34,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096561246] [2021-10-28 23:25:34,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:34,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:34,833 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:34,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [957591135] [2021-10-28 23:25:34,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:25:34,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:34,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:34,835 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:34,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-28 23:25:35,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:25:35,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:35,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 23:25:35,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-28 23:25:35,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:35,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096561246] [2021-10-28 23:25:35,312 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:35,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957591135] [2021-10-28 23:25:35,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957591135] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:25:35,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:25:35,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:25:35,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285552706] [2021-10-28 23:25:35,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:25:35,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:35,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:25:35,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:25:35,314 INFO L87 Difference]: Start difference. First operand 284 states and 337 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-10-28 23:25:35,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:35,381 INFO L93 Difference]: Finished difference Result 422 states and 504 transitions. [2021-10-28 23:25:35,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:25:35,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 [2021-10-28 23:25:35,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:35,384 INFO L225 Difference]: With dead ends: 422 [2021-10-28 23:25:35,384 INFO L226 Difference]: Without dead ends: 312 [2021-10-28 23:25:35,386 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:25:35,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-10-28 23:25:35,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 296. [2021-10-28 23:25:35,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.193220338983051) internal successors, (352), 295 states have internal predecessors, (352), 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) [2021-10-28 23:25:35,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 352 transitions. [2021-10-28 23:25:35,425 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 352 transitions. Word has length 51 [2021-10-28 23:25:35,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:35,425 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 352 transitions. [2021-10-28 23:25:35,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-10-28 23:25:35,426 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 352 transitions. [2021-10-28 23:25:35,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 23:25:35,427 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:35,427 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:35,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:35,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:35,642 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:35,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:35,643 INFO L85 PathProgramCache]: Analyzing trace with hash -258254836, now seen corresponding path program 3 times [2021-10-28 23:25:35,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:35,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21216116] [2021-10-28 23:25:35,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:35,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:35,652 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:35,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130993189] [2021-10-28 23:25:35,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:25:35,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:35,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:35,655 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:35,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-28 23:25:36,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 23:25:36,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:36,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 23:25:36,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:36,483 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:36,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:36,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21216116] [2021-10-28 23:25:36,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:36,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130993189] [2021-10-28 23:25:36,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130993189] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:36,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:36,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-28 23:25:36,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743806715] [2021-10-28 23:25:36,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 23:25:36,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:36,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 23:25:36,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:25:36,486 INFO L87 Difference]: Start difference. First operand 296 states and 352 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 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) [2021-10-28 23:25:36,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:36,674 INFO L93 Difference]: Finished difference Result 357 states and 423 transitions. [2021-10-28 23:25:36,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 23:25:36,675 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 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 [2021-10-28 23:25:36,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:36,678 INFO L225 Difference]: With dead ends: 357 [2021-10-28 23:25:36,678 INFO L226 Difference]: Without dead ends: 347 [2021-10-28 23:25:36,679 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:25:36,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-10-28 23:25:36,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 294. [2021-10-28 23:25:36,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 1.1979522184300342) internal successors, (351), 293 states have internal predecessors, (351), 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) [2021-10-28 23:25:36,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 351 transitions. [2021-10-28 23:25:36,719 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 351 transitions. Word has length 51 [2021-10-28 23:25:36,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:36,719 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 351 transitions. [2021-10-28 23:25:36,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 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) [2021-10-28 23:25:36,720 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 351 transitions. [2021-10-28 23:25:36,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 23:25:36,721 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:36,722 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:36,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:36,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-28 23:25:36,930 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:36,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:36,930 INFO L85 PathProgramCache]: Analyzing trace with hash 333939726, now seen corresponding path program 5 times [2021-10-28 23:25:36,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:36,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363511355] [2021-10-28 23:25:36,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:36,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:36,944 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:36,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395483783] [2021-10-28 23:25:36,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:25:36,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:36,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:36,946 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:36,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-28 23:25:37,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-28 23:25:37,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:37,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 23:25:37,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:37,547 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:37,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:37,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363511355] [2021-10-28 23:25:37,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:37,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395483783] [2021-10-28 23:25:37,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395483783] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:37,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:37,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-28 23:25:37,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393984798] [2021-10-28 23:25:37,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 23:25:37,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:37,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 23:25:37,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:25:37,549 INFO L87 Difference]: Start difference. First operand 294 states and 351 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 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) [2021-10-28 23:25:37,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:37,748 INFO L93 Difference]: Finished difference Result 418 states and 509 transitions. [2021-10-28 23:25:37,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 23:25:37,749 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 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 [2021-10-28 23:25:37,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:37,751 INFO L225 Difference]: With dead ends: 418 [2021-10-28 23:25:37,752 INFO L226 Difference]: Without dead ends: 316 [2021-10-28 23:25:37,754 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:25:37,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-10-28 23:25:37,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 314. [2021-10-28 23:25:37,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 1.1853035143769968) internal successors, (371), 313 states have internal predecessors, (371), 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) [2021-10-28 23:25:37,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 371 transitions. [2021-10-28 23:25:37,794 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 371 transitions. Word has length 51 [2021-10-28 23:25:37,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:37,795 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 371 transitions. [2021-10-28 23:25:37,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 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) [2021-10-28 23:25:37,795 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 371 transitions. [2021-10-28 23:25:37,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-28 23:25:37,796 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:37,797 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:37,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:38,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:38,014 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:38,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:38,015 INFO L85 PathProgramCache]: Analyzing trace with hash 434812999, now seen corresponding path program 5 times [2021-10-28 23:25:38,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:38,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40270766] [2021-10-28 23:25:38,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:38,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:38,025 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:38,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939664906] [2021-10-28 23:25:38,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:25:38,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:38,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:38,027 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:38,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-28 23:25:38,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:25:38,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:38,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 23:25:38,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 40 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:38,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:38,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40270766] [2021-10-28 23:25:38,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:38,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939664906] [2021-10-28 23:25:38,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939664906] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:38,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:38,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 23:25:38,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733804608] [2021-10-28 23:25:38,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:25:38,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:38,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:25:38,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:25:38,715 INFO L87 Difference]: Start difference. First operand 314 states and 371 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 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) [2021-10-28 23:25:38,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:38,909 INFO L93 Difference]: Finished difference Result 592 states and 717 transitions. [2021-10-28 23:25:38,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:25:38,909 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 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 53 [2021-10-28 23:25:38,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:38,913 INFO L225 Difference]: With dead ends: 592 [2021-10-28 23:25:38,913 INFO L226 Difference]: Without dead ends: 536 [2021-10-28 23:25:38,914 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:25:38,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-10-28 23:25:38,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 438. [2021-10-28 23:25:38,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 1.2128146453089246) internal successors, (530), 437 states have internal predecessors, (530), 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) [2021-10-28 23:25:38,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 530 transitions. [2021-10-28 23:25:38,976 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 530 transitions. Word has length 53 [2021-10-28 23:25:38,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:38,976 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 530 transitions. [2021-10-28 23:25:38,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 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) [2021-10-28 23:25:38,977 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 530 transitions. [2021-10-28 23:25:38,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-28 23:25:38,978 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:38,978 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:39,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-10-28 23:25:39,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-28 23:25:39,202 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:39,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:39,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1986752505, now seen corresponding path program 6 times [2021-10-28 23:25:39,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:39,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041540384] [2021-10-28 23:25:39,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:39,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:39,208 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:39,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112467] [2021-10-28 23:25:39,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:25:39,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:39,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:39,209 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:39,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-28 23:25:39,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-28 23:25:39,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:39,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 23:25:39,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:39,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:39,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041540384] [2021-10-28 23:25:39,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:39,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112467] [2021-10-28 23:25:39,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112467] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:39,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:39,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-28 23:25:39,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730087548] [2021-10-28 23:25:39,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 23:25:39,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:39,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 23:25:39,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:25:39,885 INFO L87 Difference]: Start difference. First operand 438 states and 530 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) 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) [2021-10-28 23:25:40,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:40,081 INFO L93 Difference]: Finished difference Result 696 states and 868 transitions. [2021-10-28 23:25:40,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-28 23:25:40,082 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) 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 53 [2021-10-28 23:25:40,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:40,085 INFO L225 Difference]: With dead ends: 696 [2021-10-28 23:25:40,085 INFO L226 Difference]: Without dead ends: 480 [2021-10-28 23:25:40,086 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-10-28 23:25:40,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-10-28 23:25:40,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 462. [2021-10-28 23:25:40,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 1.210412147505423) internal successors, (558), 461 states have internal predecessors, (558), 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) [2021-10-28 23:25:40,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 558 transitions. [2021-10-28 23:25:40,143 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 558 transitions. Word has length 53 [2021-10-28 23:25:40,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:40,144 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 558 transitions. [2021-10-28 23:25:40,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) 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) [2021-10-28 23:25:40,144 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 558 transitions. [2021-10-28 23:25:40,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 23:25:40,146 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:40,146 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:40,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:40,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-28 23:25:40,362 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:40,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:40,362 INFO L85 PathProgramCache]: Analyzing trace with hash 582979872, now seen corresponding path program 4 times [2021-10-28 23:25:40,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:40,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722987859] [2021-10-28 23:25:40,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:40,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:40,378 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:40,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223272703] [2021-10-28 23:25:40,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:25:40,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:40,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:40,380 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:40,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-28 23:25:40,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:25:40,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:40,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-28 23:25:40,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:41,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:41,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722987859] [2021-10-28 23:25:41,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:41,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223272703] [2021-10-28 23:25:41,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223272703] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:41,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:41,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-10-28 23:25:41,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965127531] [2021-10-28 23:25:41,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 23:25:41,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:41,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 23:25:41,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:25:41,158 INFO L87 Difference]: Start difference. First operand 462 states and 558 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 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) [2021-10-28 23:25:41,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:41,411 INFO L93 Difference]: Finished difference Result 541 states and 652 transitions. [2021-10-28 23:25:41,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 23:25:41,411 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 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 55 [2021-10-28 23:25:41,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:41,415 INFO L225 Difference]: With dead ends: 541 [2021-10-28 23:25:41,415 INFO L226 Difference]: Without dead ends: 531 [2021-10-28 23:25:41,417 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:25:41,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-10-28 23:25:41,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 456. [2021-10-28 23:25:41,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.2153846153846153) internal successors, (553), 455 states have internal predecessors, (553), 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) [2021-10-28 23:25:41,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 553 transitions. [2021-10-28 23:25:41,505 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 553 transitions. Word has length 55 [2021-10-28 23:25:41,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:41,505 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 553 transitions. [2021-10-28 23:25:41,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 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) [2021-10-28 23:25:41,506 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 553 transitions. [2021-10-28 23:25:41,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 23:25:41,507 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:41,507 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:41,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:41,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:41,710 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:41,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:41,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1175174434, now seen corresponding path program 6 times [2021-10-28 23:25:41,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:41,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689489800] [2021-10-28 23:25:41,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:41,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:41,719 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:41,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1021741290] [2021-10-28 23:25:41,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:25:41,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:41,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:41,720 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:41,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-28 23:25:42,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-28 23:25:42,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:42,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 23:25:42,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 8 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:42,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:42,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689489800] [2021-10-28 23:25:42,445 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:42,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021741290] [2021-10-28 23:25:42,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021741290] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:42,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:42,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-28 23:25:42,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280802748] [2021-10-28 23:25:42,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 23:25:42,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:42,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 23:25:42,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:25:42,458 INFO L87 Difference]: Start difference. First operand 456 states and 553 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 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) [2021-10-28 23:25:42,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:42,634 INFO L93 Difference]: Finished difference Result 684 states and 849 transitions. [2021-10-28 23:25:42,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 23:25:42,634 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 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 55 [2021-10-28 23:25:42,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:42,637 INFO L225 Difference]: With dead ends: 684 [2021-10-28 23:25:42,637 INFO L226 Difference]: Without dead ends: 492 [2021-10-28 23:25:42,637 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=188, Invalid=318, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:25:42,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-10-28 23:25:42,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 482. [2021-10-28 23:25:42,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.2037422037422036) internal successors, (579), 481 states have internal predecessors, (579), 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) [2021-10-28 23:25:42,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 579 transitions. [2021-10-28 23:25:42,701 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 579 transitions. Word has length 55 [2021-10-28 23:25:42,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:42,701 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 579 transitions. [2021-10-28 23:25:42,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 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) [2021-10-28 23:25:42,702 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 579 transitions. [2021-10-28 23:25:42,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-28 23:25:42,703 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:42,703 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:42,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:42,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:42,930 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:42,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:42,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1407515739, now seen corresponding path program 7 times [2021-10-28 23:25:42,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:42,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467997437] [2021-10-28 23:25:42,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:42,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:42,938 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:42,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852747439] [2021-10-28 23:25:42,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:25:42,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:42,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:42,939 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:42,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-28 23:25:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:43,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:25:43,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:43,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:43,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467997437] [2021-10-28 23:25:43,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:43,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852747439] [2021-10-28 23:25:43,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852747439] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:43,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:43,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 23:25:43,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263722878] [2021-10-28 23:25:43,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:25:43,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:43,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:25:43,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:25:43,567 INFO L87 Difference]: Start difference. First operand 482 states and 579 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 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) [2021-10-28 23:25:44,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:44,058 INFO L93 Difference]: Finished difference Result 794 states and 971 transitions. [2021-10-28 23:25:44,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:25:44,059 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 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 57 [2021-10-28 23:25:44,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:44,062 INFO L225 Difference]: With dead ends: 794 [2021-10-28 23:25:44,063 INFO L226 Difference]: Without dead ends: 648 [2021-10-28 23:25:44,063 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:25:44,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-10-28 23:25:44,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 482. [2021-10-28 23:25:44,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.2037422037422036) internal successors, (579), 481 states have internal predecessors, (579), 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) [2021-10-28 23:25:44,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 579 transitions. [2021-10-28 23:25:44,131 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 579 transitions. Word has length 57 [2021-10-28 23:25:44,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:44,131 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 579 transitions. [2021-10-28 23:25:44,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 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) [2021-10-28 23:25:44,131 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 579 transitions. [2021-10-28 23:25:44,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-28 23:25:44,133 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:44,133 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:44,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-10-28 23:25:44,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-28 23:25:44,340 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:44,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:44,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1014049765, now seen corresponding path program 8 times [2021-10-28 23:25:44,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:44,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127147847] [2021-10-28 23:25:44,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:44,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:44,353 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:44,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841137816] [2021-10-28 23:25:44,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:25:44,353 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:44,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:44,355 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:44,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-28 23:25:44,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:25:44,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:44,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-28 23:25:44,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 4 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:45,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:45,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127147847] [2021-10-28 23:25:45,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:45,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841137816] [2021-10-28 23:25:45,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841137816] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:45,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:45,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-10-28 23:25:45,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256993568] [2021-10-28 23:25:45,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 23:25:45,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:45,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 23:25:45,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:25:45,231 INFO L87 Difference]: Start difference. First operand 482 states and 579 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 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) [2021-10-28 23:25:45,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:45,458 INFO L93 Difference]: Finished difference Result 720 states and 887 transitions. [2021-10-28 23:25:45,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 23:25:45,459 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 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 57 [2021-10-28 23:25:45,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:45,462 INFO L225 Difference]: With dead ends: 720 [2021-10-28 23:25:45,463 INFO L226 Difference]: Without dead ends: 532 [2021-10-28 23:25:45,463 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=201, Invalid=351, Unknown=0, NotChecked=0, Total=552 [2021-10-28 23:25:45,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-10-28 23:25:45,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 506. [2021-10-28 23:25:45,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 1.201980198019802) internal successors, (607), 505 states have internal predecessors, (607), 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) [2021-10-28 23:25:45,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 607 transitions. [2021-10-28 23:25:45,560 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 607 transitions. Word has length 57 [2021-10-28 23:25:45,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:45,560 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 607 transitions. [2021-10-28 23:25:45,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 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) [2021-10-28 23:25:45,561 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 607 transitions. [2021-10-28 23:25:45,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-28 23:25:45,563 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:45,563 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:45,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-10-28 23:25:45,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-28 23:25:45,782 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:45,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:45,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1887169658, now seen corresponding path program 7 times [2021-10-28 23:25:45,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:45,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138654519] [2021-10-28 23:25:45,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:45,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:45,796 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:45,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174370323] [2021-10-28 23:25:45,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:25:45,796 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:45,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:45,797 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:45,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-28 23:25:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:46,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-28 23:25:46,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 14 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:46,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:46,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138654519] [2021-10-28 23:25:46,568 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:46,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174370323] [2021-10-28 23:25:46,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174370323] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:46,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:46,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-10-28 23:25:46,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115314913] [2021-10-28 23:25:46,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 23:25:46,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:46,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 23:25:46,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:25:46,570 INFO L87 Difference]: Start difference. First operand 506 states and 607 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 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) [2021-10-28 23:25:46,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:46,810 INFO L93 Difference]: Finished difference Result 730 states and 899 transitions. [2021-10-28 23:25:46,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-28 23:25:46,811 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 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 59 [2021-10-28 23:25:46,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:46,814 INFO L225 Difference]: With dead ends: 730 [2021-10-28 23:25:46,814 INFO L226 Difference]: Without dead ends: 538 [2021-10-28 23:25:46,815 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2021-10-28 23:25:46,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-10-28 23:25:46,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2021-10-28 23:25:46,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 1.1899441340782122) internal successors, (639), 537 states have internal predecessors, (639), 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) [2021-10-28 23:25:46,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 639 transitions. [2021-10-28 23:25:46,895 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 639 transitions. Word has length 59 [2021-10-28 23:25:46,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:46,896 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 639 transitions. [2021-10-28 23:25:46,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 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) [2021-10-28 23:25:46,896 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 639 transitions. [2021-10-28 23:25:46,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-28 23:25:46,897 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:46,898 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:46,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:47,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-28 23:25:47,114 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:47,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:47,115 INFO L85 PathProgramCache]: Analyzing trace with hash -952557516, now seen corresponding path program 5 times [2021-10-28 23:25:47,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:47,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387575662] [2021-10-28 23:25:47,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:47,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:47,126 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:47,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354589190] [2021-10-28 23:25:47,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:25:47,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:47,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:47,128 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:47,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-28 23:25:47,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-28 23:25:47,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:47,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 23:25:47,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:47,972 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:47,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:47,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387575662] [2021-10-28 23:25:47,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:47,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354589190] [2021-10-28 23:25:47,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354589190] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:47,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:47,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-10-28 23:25:47,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898514833] [2021-10-28 23:25:47,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 23:25:47,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:47,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 23:25:47,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:25:47,974 INFO L87 Difference]: Start difference. First operand 538 states and 639 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 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) [2021-10-28 23:25:48,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:48,216 INFO L93 Difference]: Finished difference Result 588 states and 698 transitions. [2021-10-28 23:25:48,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-28 23:25:48,217 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 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 59 [2021-10-28 23:25:48,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:48,219 INFO L225 Difference]: With dead ends: 588 [2021-10-28 23:25:48,219 INFO L226 Difference]: Without dead ends: 578 [2021-10-28 23:25:48,220 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-10-28 23:25:48,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-10-28 23:25:48,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 534. [2021-10-28 23:25:48,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 1.1932457786116322) internal successors, (636), 533 states have internal predecessors, (636), 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) [2021-10-28 23:25:48,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 636 transitions. [2021-10-28 23:25:48,315 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 636 transitions. Word has length 59 [2021-10-28 23:25:48,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:48,315 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 636 transitions. [2021-10-28 23:25:48,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 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) [2021-10-28 23:25:48,316 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 636 transitions. [2021-10-28 23:25:48,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-28 23:25:48,317 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:48,317 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:48,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:48,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-28 23:25:48,546 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:48,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:48,546 INFO L85 PathProgramCache]: Analyzing trace with hash 803270191, now seen corresponding path program 9 times [2021-10-28 23:25:48,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:48,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328434139] [2021-10-28 23:25:48,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:48,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:48,558 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:48,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812910246] [2021-10-28 23:25:48,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:25:48,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:48,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:48,560 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:48,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-28 23:25:49,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-28 23:25:49,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:49,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 23:25:49,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:49,593 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 4 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:49,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:49,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328434139] [2021-10-28 23:25:49,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:49,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812910246] [2021-10-28 23:25:49,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812910246] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:49,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:49,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-10-28 23:25:49,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247660393] [2021-10-28 23:25:49,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 23:25:49,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:49,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 23:25:49,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:25:49,595 INFO L87 Difference]: Start difference. First operand 534 states and 636 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 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) [2021-10-28 23:25:49,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:49,807 INFO L93 Difference]: Finished difference Result 772 states and 944 transitions. [2021-10-28 23:25:49,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 23:25:49,808 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 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 61 [2021-10-28 23:25:49,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:49,810 INFO L225 Difference]: With dead ends: 772 [2021-10-28 23:25:49,810 INFO L226 Difference]: Without dead ends: 584 [2021-10-28 23:25:49,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-10-28 23:25:49,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-10-28 23:25:49,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 558. [2021-10-28 23:25:49,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 1.1921005385996408) internal successors, (664), 557 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) [2021-10-28 23:25:49,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 664 transitions. [2021-10-28 23:25:49,897 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 664 transitions. Word has length 61 [2021-10-28 23:25:49,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:49,898 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 664 transitions. [2021-10-28 23:25:49,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 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) [2021-10-28 23:25:49,898 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 664 transitions. [2021-10-28 23:25:49,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-28 23:25:49,900 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:49,900 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:49,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:50,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-10-28 23:25:50,109 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:50,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:50,109 INFO L85 PathProgramCache]: Analyzing trace with hash -132247666, now seen corresponding path program 8 times [2021-10-28 23:25:50,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:50,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647436854] [2021-10-28 23:25:50,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:50,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:50,118 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:50,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11609282] [2021-10-28 23:25:50,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:25:50,119 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:50,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:50,120 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:50,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-28 23:25:50,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:25:50,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:50,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 23:25:50,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:50,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:50,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647436854] [2021-10-28 23:25:50,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:50,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11609282] [2021-10-28 23:25:50,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11609282] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:50,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:50,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-10-28 23:25:50,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367111336] [2021-10-28 23:25:50,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 23:25:50,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:50,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 23:25:50,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:25:50,905 INFO L87 Difference]: Start difference. First operand 558 states and 664 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 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) [2021-10-28 23:25:51,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:51,188 INFO L93 Difference]: Finished difference Result 782 states and 956 transitions. [2021-10-28 23:25:51,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 23:25:51,188 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 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 63 [2021-10-28 23:25:51,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:51,191 INFO L225 Difference]: With dead ends: 782 [2021-10-28 23:25:51,191 INFO L226 Difference]: Without dead ends: 590 [2021-10-28 23:25:51,192 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=261, Invalid=441, Unknown=0, NotChecked=0, Total=702 [2021-10-28 23:25:51,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-10-28 23:25:51,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2021-10-28 23:25:51,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 1.1816638370118846) internal successors, (696), 589 states have internal predecessors, (696), 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) [2021-10-28 23:25:51,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 696 transitions. [2021-10-28 23:25:51,269 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 696 transitions. Word has length 63 [2021-10-28 23:25:51,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:51,269 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 696 transitions. [2021-10-28 23:25:51,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 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) [2021-10-28 23:25:51,270 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 696 transitions. [2021-10-28 23:25:51,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-28 23:25:51,271 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:51,272 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:51,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-10-28 23:25:51,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:51,486 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:51,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:51,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1735198024, now seen corresponding path program 6 times [2021-10-28 23:25:51,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:51,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061654016] [2021-10-28 23:25:51,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:51,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:51,498 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:51,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1331805688] [2021-10-28 23:25:51,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:25:51,499 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:51,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:51,500 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:51,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-28 23:25:52,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-28 23:25:52,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:52,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-28 23:25:52,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:52,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:52,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061654016] [2021-10-28 23:25:52,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:52,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331805688] [2021-10-28 23:25:52,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331805688] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:52,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:52,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-10-28 23:25:52,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479877707] [2021-10-28 23:25:52,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 23:25:52,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:52,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 23:25:52,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:25:52,558 INFO L87 Difference]: Start difference. First operand 590 states and 696 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 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) [2021-10-28 23:25:52,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:52,794 INFO L93 Difference]: Finished difference Result 640 states and 755 transitions. [2021-10-28 23:25:52,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 23:25:52,795 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 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 63 [2021-10-28 23:25:52,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:52,798 INFO L225 Difference]: With dead ends: 640 [2021-10-28 23:25:52,798 INFO L226 Difference]: Without dead ends: 630 [2021-10-28 23:25:52,799 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=255, Invalid=447, Unknown=0, NotChecked=0, Total=702 [2021-10-28 23:25:52,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-10-28 23:25:52,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 586. [2021-10-28 23:25:52,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 1.1846153846153846) internal successors, (693), 585 states have internal predecessors, (693), 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) [2021-10-28 23:25:52,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 693 transitions. [2021-10-28 23:25:52,870 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 693 transitions. Word has length 63 [2021-10-28 23:25:52,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:52,871 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 693 transitions. [2021-10-28 23:25:52,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 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) [2021-10-28 23:25:52,871 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 693 transitions. [2021-10-28 23:25:52,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-28 23:25:52,873 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:52,873 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:52,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:53,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-10-28 23:25:53,081 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:25:53,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:53,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1780609863, now seen corresponding path program 10 times [2021-10-28 23:25:53,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:53,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084781246] [2021-10-28 23:25:53,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:53,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:53,090 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:53,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44861605] [2021-10-28 23:25:53,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:25:53,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:53,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:53,091 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:53,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-28 23:25:53,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:25:53,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:53,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-28 23:25:53,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:26:02,215 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 8 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:02,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:02,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084781246] [2021-10-28 23:26:02,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:26:02,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44861605] [2021-10-28 23:26:02,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44861605] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:26:02,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:26:02,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-28 23:26:02,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155463392] [2021-10-28 23:26:02,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:26:02,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:02,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:26:02,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=102, Unknown=1, NotChecked=0, Total=132 [2021-10-28 23:26:02,217 INFO L87 Difference]: Start difference. First operand 586 states and 693 transitions. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 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) [2021-10-28 23:26:24,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:24,730 INFO L93 Difference]: Finished difference Result 915 states and 1101 transitions. [2021-10-28 23:26:24,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 23:26:24,731 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 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 65 [2021-10-28 23:26:24,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:24,735 INFO L225 Difference]: With dead ends: 915 [2021-10-28 23:26:24,735 INFO L226 Difference]: Without dead ends: 771 [2021-10-28 23:26:24,736 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=128, Invalid=469, Unknown=3, NotChecked=0, Total=600 [2021-10-28 23:26:24,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-10-28 23:26:24,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 702. [2021-10-28 23:26:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 1.18830242510699) internal successors, (833), 701 states have internal predecessors, (833), 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) [2021-10-28 23:26:24,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 833 transitions. [2021-10-28 23:26:24,891 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 833 transitions. Word has length 65 [2021-10-28 23:26:24,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:24,891 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 833 transitions. [2021-10-28 23:26:24,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 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) [2021-10-28 23:26:24,891 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 833 transitions. [2021-10-28 23:26:24,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-28 23:26:24,893 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:24,893 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:24,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-28 23:26:25,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:26:25,106 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:26:25,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:25,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1833968061, now seen corresponding path program 11 times [2021-10-28 23:26:25,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:25,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989306958] [2021-10-28 23:26:25,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:25,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:25,114 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:26:25,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735132203] [2021-10-28 23:26:25,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:26:25,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:26:25,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:26:25,121 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:26:25,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-28 23:26:25,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-10-28 23:26:25,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:26:25,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-28 23:26:25,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:26:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:26,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:26,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989306958] [2021-10-28 23:26:26,139 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:26:26,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735132203] [2021-10-28 23:26:26,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735132203] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:26:26,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:26:26,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-10-28 23:26:26,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059776257] [2021-10-28 23:26:26,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 23:26:26,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:26,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 23:26:26,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:26:26,141 INFO L87 Difference]: Start difference. First operand 702 states and 833 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 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) [2021-10-28 23:26:26,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:26,519 INFO L93 Difference]: Finished difference Result 1029 states and 1253 transitions. [2021-10-28 23:26:26,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-28 23:26:26,520 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 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 65 [2021-10-28 23:26:26,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:26,524 INFO L225 Difference]: With dead ends: 1029 [2021-10-28 23:26:26,524 INFO L226 Difference]: Without dead ends: 779 [2021-10-28 23:26:26,526 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=480, Unknown=0, NotChecked=0, Total=756 [2021-10-28 23:26:26,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-10-28 23:26:26,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 734. [2021-10-28 23:26:26,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 1.1869031377899044) internal successors, (870), 733 states have internal predecessors, (870), 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) [2021-10-28 23:26:26,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 870 transitions. [2021-10-28 23:26:26,647 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 870 transitions. Word has length 65 [2021-10-28 23:26:26,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:26,648 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 870 transitions. [2021-10-28 23:26:26,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 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) [2021-10-28 23:26:26,648 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 870 transitions. [2021-10-28 23:26:26,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-28 23:26:26,650 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:26,650 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:26,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-10-28 23:26:26,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:26:26,863 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:26:26,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:26,864 INFO L85 PathProgramCache]: Analyzing trace with hash -854554462, now seen corresponding path program 9 times [2021-10-28 23:26:26,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:26,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128947453] [2021-10-28 23:26:26,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:26,864 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:26,871 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:26:26,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034649419] [2021-10-28 23:26:26,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:26:26,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:26:26,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:26:26,873 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:26:26,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-28 23:26:27,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-28 23:26:27,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:26:27,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-28 23:26:27,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:26:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 14 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:28,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:28,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128947453] [2021-10-28 23:26:28,030 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:26:28,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034649419] [2021-10-28 23:26:28,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034649419] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:26:28,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:26:28,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-10-28 23:26:28,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691653165] [2021-10-28 23:26:28,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 23:26:28,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:28,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 23:26:28,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:26:28,031 INFO L87 Difference]: Start difference. First operand 734 states and 870 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 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) [2021-10-28 23:26:28,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:28,322 INFO L93 Difference]: Finished difference Result 1042 states and 1269 transitions. [2021-10-28 23:26:28,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 23:26:28,322 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 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 67 [2021-10-28 23:26:28,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:28,326 INFO L225 Difference]: With dead ends: 1042 [2021-10-28 23:26:28,326 INFO L226 Difference]: Without dead ends: 788 [2021-10-28 23:26:28,327 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=302, Invalid=510, Unknown=0, NotChecked=0, Total=812 [2021-10-28 23:26:28,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-10-28 23:26:28,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 788. [2021-10-28 23:26:28,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 1.1740787801778907) internal successors, (924), 787 states have internal predecessors, (924), 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) [2021-10-28 23:26:28,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 924 transitions. [2021-10-28 23:26:28,485 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 924 transitions. Word has length 67 [2021-10-28 23:26:28,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:28,485 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 924 transitions. [2021-10-28 23:26:28,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 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) [2021-10-28 23:26:28,486 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 924 transitions. [2021-10-28 23:26:28,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-28 23:26:28,487 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:28,487 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:28,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-28 23:26:28,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-10-28 23:26:28,688 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:26:28,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:28,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1379942492, now seen corresponding path program 7 times [2021-10-28 23:26:28,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:28,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043155991] [2021-10-28 23:26:28,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:28,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:28,696 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:26:28,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841609086] [2021-10-28 23:26:28,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:26:28,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:26:28,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:26:28,698 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:26:28,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-28 23:26:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:29,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-28 23:26:29,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:26:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:29,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:29,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043155991] [2021-10-28 23:26:29,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:26:29,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841609086] [2021-10-28 23:26:29,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841609086] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:26:29,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:26:29,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-10-28 23:26:29,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100404457] [2021-10-28 23:26:29,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 23:26:29,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:29,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 23:26:29,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:26:29,710 INFO L87 Difference]: Start difference. First operand 788 states and 924 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 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) [2021-10-28 23:26:30,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:30,029 INFO L93 Difference]: Finished difference Result 857 states and 1005 transitions. [2021-10-28 23:26:30,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 23:26:30,030 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 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 67 [2021-10-28 23:26:30,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:30,034 INFO L225 Difference]: With dead ends: 857 [2021-10-28 23:26:30,034 INFO L226 Difference]: Without dead ends: 847 [2021-10-28 23:26:30,035 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=295, Invalid=517, Unknown=0, NotChecked=0, Total=812 [2021-10-28 23:26:30,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-10-28 23:26:30,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 778. [2021-10-28 23:26:30,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 1.1776061776061777) internal successors, (915), 777 states have internal predecessors, (915), 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) [2021-10-28 23:26:30,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 915 transitions. [2021-10-28 23:26:30,158 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 915 transitions. Word has length 67 [2021-10-28 23:26:30,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:30,158 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 915 transitions. [2021-10-28 23:26:30,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 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) [2021-10-28 23:26:30,159 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 915 transitions. [2021-10-28 23:26:30,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-10-28 23:26:30,160 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:30,161 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:30,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-10-28 23:26:30,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-28 23:26:30,374 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:26:30,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:30,374 INFO L85 PathProgramCache]: Analyzing trace with hash -866486437, now seen corresponding path program 12 times [2021-10-28 23:26:30,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:30,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471683916] [2021-10-28 23:26:30,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:30,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:30,386 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:26:30,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950505913] [2021-10-28 23:26:30,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:26:30,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:26:30,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:26:30,388 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:26:30,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-28 23:26:31,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-28 23:26:31,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:26:31,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-28 23:26:31,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:26:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 6 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:31,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:31,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471683916] [2021-10-28 23:26:31,440 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:26:31,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950505913] [2021-10-28 23:26:31,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950505913] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:26:31,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:26:31,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-10-28 23:26:31,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524403053] [2021-10-28 23:26:31,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 23:26:31,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:31,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 23:26:31,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:26:31,442 INFO L87 Difference]: Start difference. First operand 778 states and 915 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:26:31,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:31,785 INFO L93 Difference]: Finished difference Result 1105 states and 1335 transitions. [2021-10-28 23:26:31,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 23:26:31,790 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-10-28 23:26:31,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:31,795 INFO L225 Difference]: With dead ends: 1105 [2021-10-28 23:26:31,795 INFO L226 Difference]: Without dead ends: 855 [2021-10-28 23:26:31,797 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=318, Invalid=552, Unknown=0, NotChecked=0, Total=870 [2021-10-28 23:26:31,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-10-28 23:26:31,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 810. [2021-10-28 23:26:31,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 1.176761433868974) internal successors, (952), 809 states have internal predecessors, (952), 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) [2021-10-28 23:26:31,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 952 transitions. [2021-10-28 23:26:31,936 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 952 transitions. Word has length 69 [2021-10-28 23:26:31,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:31,936 INFO L470 AbstractCegarLoop]: Abstraction has 810 states and 952 transitions. [2021-10-28 23:26:31,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:26:31,937 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 952 transitions. [2021-10-28 23:26:31,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-28 23:26:31,938 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:31,938 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:31,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-10-28 23:26:32,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-10-28 23:26:32,145 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:26:32,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:32,146 INFO L85 PathProgramCache]: Analyzing trace with hash -878120076, now seen corresponding path program 8 times [2021-10-28 23:26:32,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:32,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580959057] [2021-10-28 23:26:32,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:32,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:32,156 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:26:32,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [84089950] [2021-10-28 23:26:32,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:26:32,157 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:26:32,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:26:32,158 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:26:32,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-28 23:26:32,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:26:32,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:26:32,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-28 23:26:32,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:26:33,262 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:33,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:33,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580959057] [2021-10-28 23:26:33,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:26:33,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84089950] [2021-10-28 23:26:33,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84089950] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:26:33,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:26:33,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-10-28 23:26:33,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131285219] [2021-10-28 23:26:33,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 23:26:33,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:33,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 23:26:33,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:26:33,264 INFO L87 Difference]: Start difference. First operand 810 states and 952 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 states have internal predecessors, (71), 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) [2021-10-28 23:26:33,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:33,718 INFO L93 Difference]: Finished difference Result 940 states and 1103 transitions. [2021-10-28 23:26:33,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-28 23:26:33,718 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 states have internal predecessors, (71), 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 71 [2021-10-28 23:26:33,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:33,723 INFO L225 Difference]: With dead ends: 940 [2021-10-28 23:26:33,723 INFO L226 Difference]: Without dead ends: 930 [2021-10-28 23:26:33,725 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=338, Invalid=592, Unknown=0, NotChecked=0, Total=930 [2021-10-28 23:26:33,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-10-28 23:26:33,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 798. [2021-10-28 23:26:33,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 1.180677540777917) internal successors, (941), 797 states have internal predecessors, (941), 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) [2021-10-28 23:26:33,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 941 transitions. [2021-10-28 23:26:33,844 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 941 transitions. Word has length 71 [2021-10-28 23:26:33,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:33,844 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 941 transitions. [2021-10-28 23:26:33,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 states have internal predecessors, (71), 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) [2021-10-28 23:26:33,844 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 941 transitions. [2021-10-28 23:26:33,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-28 23:26:33,845 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:33,846 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:33,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-10-28 23:26:34,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-28 23:26:34,050 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:26:34,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:34,051 INFO L85 PathProgramCache]: Analyzing trace with hash -2093459530, now seen corresponding path program 10 times [2021-10-28 23:26:34,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:34,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033374390] [2021-10-28 23:26:34,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:34,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:34,073 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:26:34,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37980557] [2021-10-28 23:26:34,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:26:34,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:26:34,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:26:34,078 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:26:34,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-28 23:26:34,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:26:34,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:26:34,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-28 23:26:34,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:26:35,316 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 14 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:35,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:35,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033374390] [2021-10-28 23:26:35,316 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:26:35,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37980557] [2021-10-28 23:26:35,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37980557] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:26:35,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:26:35,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-10-28 23:26:35,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160119517] [2021-10-28 23:26:35,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 23:26:35,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:35,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 23:26:35,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:26:35,318 INFO L87 Difference]: Start difference. First operand 798 states and 941 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 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) [2021-10-28 23:26:35,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:35,667 INFO L93 Difference]: Finished difference Result 1127 states and 1361 transitions. [2021-10-28 23:26:35,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-28 23:26:35,668 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 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 71 [2021-10-28 23:26:35,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:35,671 INFO L225 Difference]: With dead ends: 1127 [2021-10-28 23:26:35,671 INFO L226 Difference]: Without dead ends: 873 [2021-10-28 23:26:35,672 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=346, Invalid=584, Unknown=0, NotChecked=0, Total=930 [2021-10-28 23:26:35,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-10-28 23:26:35,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 854. [2021-10-28 23:26:35,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 1.1688159437280188) internal successors, (997), 853 states have internal predecessors, (997), 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) [2021-10-28 23:26:35,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 997 transitions. [2021-10-28 23:26:35,784 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 997 transitions. Word has length 71 [2021-10-28 23:26:35,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:35,785 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 997 transitions. [2021-10-28 23:26:35,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 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) [2021-10-28 23:26:35,785 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 997 transitions. [2021-10-28 23:26:35,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-28 23:26:35,787 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:35,787 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:35,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-10-28 23:26:35,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-28 23:26:35,991 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:26:35,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:35,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1744771503, now seen corresponding path program 13 times [2021-10-28 23:26:35,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:35,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30101037] [2021-10-28 23:26:35,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:35,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:36,012 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:26:36,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122655832] [2021-10-28 23:26:36,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:26:36,013 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:26:36,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:26:36,014 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:26:36,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-10-28 23:26:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:36,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-28 23:26:36,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:26:37,124 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 6 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:37,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:37,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30101037] [2021-10-28 23:26:37,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:26:37,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122655832] [2021-10-28 23:26:37,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122655832] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:26:37,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:26:37,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-10-28 23:26:37,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037351748] [2021-10-28 23:26:37,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 23:26:37,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:37,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 23:26:37,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:26:37,126 INFO L87 Difference]: Start difference. First operand 854 states and 997 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 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) [2021-10-28 23:26:37,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:37,581 INFO L93 Difference]: Finished difference Result 1181 states and 1417 transitions. [2021-10-28 23:26:37,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-28 23:26:37,582 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 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 73 [2021-10-28 23:26:37,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:37,588 INFO L225 Difference]: With dead ends: 1181 [2021-10-28 23:26:37,588 INFO L226 Difference]: Without dead ends: 931 [2021-10-28 23:26:37,589 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=363, Invalid=629, Unknown=0, NotChecked=0, Total=992 [2021-10-28 23:26:37,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-10-28 23:26:37,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 886. [2021-10-28 23:26:37,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 1.168361581920904) internal successors, (1034), 885 states have internal predecessors, (1034), 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) [2021-10-28 23:26:37,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1034 transitions. [2021-10-28 23:26:37,796 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1034 transitions. Word has length 73 [2021-10-28 23:26:37,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:37,796 INFO L470 AbstractCegarLoop]: Abstraction has 886 states and 1034 transitions. [2021-10-28 23:26:37,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 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) [2021-10-28 23:26:37,797 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1034 transitions. [2021-10-28 23:26:37,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-28 23:26:37,799 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:37,800 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:37,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-10-28 23:26:38,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:26:38,010 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:26:38,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:38,010 INFO L85 PathProgramCache]: Analyzing trace with hash 279859400, now seen corresponding path program 9 times [2021-10-28 23:26:38,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:38,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805994726] [2021-10-28 23:26:38,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:38,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:38,028 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:26:38,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552991785] [2021-10-28 23:26:38,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:26:38,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:26:38,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:26:38,030 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:26:38,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-10-28 23:29:34,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-28 23:29:34,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:29:34,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 23:29:34,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:29:34,823 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:29:34,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:29:34,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805994726] [2021-10-28 23:29:34,823 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:29:34,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552991785] [2021-10-28 23:29:34,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552991785] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:34,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:29:34,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-10-28 23:29:34,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143157183] [2021-10-28 23:29:34,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 23:29:34,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:29:34,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 23:29:34,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-10-28 23:29:34,824 INFO L87 Difference]: Start difference. First operand 886 states and 1034 transitions. Second operand has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 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) [2021-10-28 23:29:35,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:29:35,205 INFO L93 Difference]: Finished difference Result 1016 states and 1185 transitions. [2021-10-28 23:29:35,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-28 23:29:35,205 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 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 75 [2021-10-28 23:29:35,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:29:35,209 INFO L225 Difference]: With dead ends: 1016 [2021-10-28 23:29:35,209 INFO L226 Difference]: Without dead ends: 1006 [2021-10-28 23:29:35,210 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=384, Invalid=672, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 23:29:35,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-10-28 23:29:35,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 874. [2021-10-28 23:29:35,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 1.1718213058419245) internal successors, (1023), 873 states have internal predecessors, (1023), 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) [2021-10-28 23:29:35,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1023 transitions. [2021-10-28 23:29:35,332 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1023 transitions. Word has length 75 [2021-10-28 23:29:35,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:29:35,332 INFO L470 AbstractCegarLoop]: Abstraction has 874 states and 1023 transitions. [2021-10-28 23:29:35,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 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) [2021-10-28 23:29:35,332 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1023 transitions. [2021-10-28 23:29:35,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-28 23:29:35,333 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:35,333 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:35,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-10-28 23:29:35,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:35,534 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:29:35,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:35,534 INFO L85 PathProgramCache]: Analyzing trace with hash 872053962, now seen corresponding path program 11 times [2021-10-28 23:29:35,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:29:35,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453654628] [2021-10-28 23:29:35,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:35,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:29:35,544 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:29:35,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831472275] [2021-10-28 23:29:35,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:29:35,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:35,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:29:35,546 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:29:35,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-10-28 23:29:36,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-28 23:29:36,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:29:36,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-28 23:29:36,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:29:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 14 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:29:36,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:29:36,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453654628] [2021-10-28 23:29:36,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:29:36,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831472275] [2021-10-28 23:29:36,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831472275] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:36,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:29:36,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-10-28 23:29:36,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818623151] [2021-10-28 23:29:36,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 23:29:36,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:29:36,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 23:29:36,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:29:36,936 INFO L87 Difference]: Start difference. First operand 874 states and 1023 transitions. Second operand has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 states have internal predecessors, (75), 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) [2021-10-28 23:29:37,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:29:37,408 INFO L93 Difference]: Finished difference Result 1203 states and 1443 transitions. [2021-10-28 23:29:37,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-28 23:29:37,409 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 states have internal predecessors, (75), 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 75 [2021-10-28 23:29:37,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:29:37,414 INFO L225 Difference]: With dead ends: 1203 [2021-10-28 23:29:37,414 INFO L226 Difference]: Without dead ends: 949 [2021-10-28 23:29:37,415 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=393, Invalid=663, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 23:29:37,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-10-28 23:29:37,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 930. [2021-10-28 23:29:37,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 929 states have (on average 1.1614639397201292) internal successors, (1079), 929 states have internal predecessors, (1079), 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) [2021-10-28 23:29:37,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1079 transitions. [2021-10-28 23:29:37,556 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1079 transitions. Word has length 75 [2021-10-28 23:29:37,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:29:37,556 INFO L470 AbstractCegarLoop]: Abstraction has 930 states and 1079 transitions. [2021-10-28 23:29:37,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 states have internal predecessors, (75), 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) [2021-10-28 23:29:37,557 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1079 transitions. [2021-10-28 23:29:37,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-28 23:29:37,558 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:37,558 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:37,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-10-28 23:29:37,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-10-28 23:29:37,759 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:29:37,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:37,759 INFO L85 PathProgramCache]: Analyzing trace with hash -255047229, now seen corresponding path program 14 times [2021-10-28 23:29:37,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:29:37,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556586562] [2021-10-28 23:29:37,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:37,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:29:37,772 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:29:37,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335249782] [2021-10-28 23:29:37,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:29:37,773 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:37,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:29:37,774 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:29:37,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-10-28 23:29:38,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:29:38,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:29:38,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 23:29:38,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:29:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 6 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:29:39,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:29:39,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556586562] [2021-10-28 23:29:39,004 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:29:39,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335249782] [2021-10-28 23:29:39,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335249782] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:39,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:29:39,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-10-28 23:29:39,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357660988] [2021-10-28 23:29:39,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 23:29:39,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:29:39,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 23:29:39,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-10-28 23:29:39,005 INFO L87 Difference]: Start difference. First operand 930 states and 1079 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 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) [2021-10-28 23:29:39,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:29:39,409 INFO L93 Difference]: Finished difference Result 1257 states and 1499 transitions. [2021-10-28 23:29:39,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-28 23:29:39,410 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 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 77 [2021-10-28 23:29:39,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:29:39,414 INFO L225 Difference]: With dead ends: 1257 [2021-10-28 23:29:39,414 INFO L226 Difference]: Without dead ends: 1007 [2021-10-28 23:29:39,415 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=411, Invalid=711, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 23:29:39,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2021-10-28 23:29:39,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 962. [2021-10-28 23:29:39,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 961 states have (on average 1.1612903225806452) internal successors, (1116), 961 states have internal predecessors, (1116), 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) [2021-10-28 23:29:39,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1116 transitions. [2021-10-28 23:29:39,570 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1116 transitions. Word has length 77 [2021-10-28 23:29:39,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:29:39,570 INFO L470 AbstractCegarLoop]: Abstraction has 962 states and 1116 transitions. [2021-10-28 23:29:39,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 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) [2021-10-28 23:29:39,570 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1116 transitions. [2021-10-28 23:29:39,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-28 23:29:39,572 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:39,572 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:39,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-10-28 23:29:39,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:39,772 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:29:39,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:39,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1695560740, now seen corresponding path program 10 times [2021-10-28 23:29:39,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:29:39,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709023663] [2021-10-28 23:29:39,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:39,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:29:39,784 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:29:39,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291902879] [2021-10-28 23:29:39,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:29:39,785 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:39,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:29:39,790 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:29:39,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-10-28 23:29:40,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:29:40,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:29:40,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-28 23:29:40,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:29:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:29:41,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:29:41,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709023663] [2021-10-28 23:29:41,106 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:29:41,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291902879] [2021-10-28 23:29:41,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291902879] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:41,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:29:41,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-10-28 23:29:41,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352386356] [2021-10-28 23:29:41,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 23:29:41,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:29:41,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 23:29:41,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:29:41,108 INFO L87 Difference]: Start difference. First operand 962 states and 1116 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 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) [2021-10-28 23:29:41,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:29:41,534 INFO L93 Difference]: Finished difference Result 1092 states and 1267 transitions. [2021-10-28 23:29:41,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-28 23:29:41,534 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 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 79 [2021-10-28 23:29:41,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:29:41,538 INFO L225 Difference]: With dead ends: 1092 [2021-10-28 23:29:41,538 INFO L226 Difference]: Without dead ends: 1082 [2021-10-28 23:29:41,539 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=433, Invalid=757, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 23:29:41,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-10-28 23:29:41,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 950. [2021-10-28 23:29:41,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 1.1643835616438356) internal successors, (1105), 949 states have internal predecessors, (1105), 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) [2021-10-28 23:29:41,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1105 transitions. [2021-10-28 23:29:41,721 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1105 transitions. Word has length 79 [2021-10-28 23:29:41,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:29:41,721 INFO L470 AbstractCegarLoop]: Abstraction has 950 states and 1105 transitions. [2021-10-28 23:29:41,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 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) [2021-10-28 23:29:41,721 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1105 transitions. [2021-10-28 23:29:41,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-28 23:29:41,723 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:41,724 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 9, 7, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:41,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-10-28 23:29:41,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-10-28 23:29:41,938 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:29:41,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:41,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1103366178, now seen corresponding path program 12 times [2021-10-28 23:29:41,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:29:41,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548941920] [2021-10-28 23:29:41,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:41,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:29:41,965 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:29:41,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126019935] [2021-10-28 23:29:41,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:29:41,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:41,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:29:41,966 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:29:41,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-10-28 23:29:47,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-28 23:29:47,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:29:47,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 23:29:47,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:29:47,697 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 14 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:29:47,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:29:47,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548941920] [2021-10-28 23:29:47,697 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:29:47,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126019935] [2021-10-28 23:29:47,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126019935] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:47,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:29:47,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-10-28 23:29:47,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408317816] [2021-10-28 23:29:47,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 23:29:47,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:29:47,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 23:29:47,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-10-28 23:29:47,700 INFO L87 Difference]: Start difference. First operand 950 states and 1105 transitions. Second operand has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 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) [2021-10-28 23:29:48,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:29:48,133 INFO L93 Difference]: Finished difference Result 1279 states and 1525 transitions. [2021-10-28 23:29:48,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-28 23:29:48,133 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 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 79 [2021-10-28 23:29:48,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:29:48,137 INFO L225 Difference]: With dead ends: 1279 [2021-10-28 23:29:48,137 INFO L226 Difference]: Without dead ends: 1025 [2021-10-28 23:29:48,138 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=443, Invalid=747, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 23:29:48,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-10-28 23:29:48,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 1006. [2021-10-28 23:29:48,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 1.155223880597015) internal successors, (1161), 1005 states have internal predecessors, (1161), 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) [2021-10-28 23:29:48,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1161 transitions. [2021-10-28 23:29:48,312 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1161 transitions. Word has length 79 [2021-10-28 23:29:48,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:29:48,312 INFO L470 AbstractCegarLoop]: Abstraction has 1006 states and 1161 transitions. [2021-10-28 23:29:48,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 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) [2021-10-28 23:29:48,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1161 transitions. [2021-10-28 23:29:48,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-10-28 23:29:48,314 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:48,314 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:48,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-10-28 23:29:48,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-10-28 23:29:48,514 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:29:48,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:48,515 INFO L85 PathProgramCache]: Analyzing trace with hash -258256937, now seen corresponding path program 15 times [2021-10-28 23:29:48,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:29:48,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060180306] [2021-10-28 23:29:48,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:48,516 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:29:48,527 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:29:48,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1726719783] [2021-10-28 23:29:48,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:29:48,528 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:48,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:29:48,532 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:29:48,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-10-28 23:29:49,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-28 23:29:49,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:29:49,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-28 23:29:49,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:29:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 6 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:29:50,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:29:50,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060180306] [2021-10-28 23:29:50,163 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:29:50,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726719783] [2021-10-28 23:29:50,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726719783] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:50,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:29:50,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-10-28 23:29:50,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048860225] [2021-10-28 23:29:50,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 23:29:50,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:29:50,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 23:29:50,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:29:50,164 INFO L87 Difference]: Start difference. First operand 1006 states and 1161 transitions. Second operand has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 20 states have internal predecessors, (81), 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) [2021-10-28 23:29:50,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:29:50,804 INFO L93 Difference]: Finished difference Result 1333 states and 1581 transitions. [2021-10-28 23:29:50,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-28 23:29:50,805 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 20 states have internal predecessors, (81), 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 81 [2021-10-28 23:29:50,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:29:50,811 INFO L225 Difference]: With dead ends: 1333 [2021-10-28 23:29:50,812 INFO L226 Difference]: Without dead ends: 1083 [2021-10-28 23:29:50,813 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=462, Invalid=798, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 23:29:50,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-10-28 23:29:50,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1038. [2021-10-28 23:29:50,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1037 states have (on average 1.1552555448408872) internal successors, (1198), 1037 states have internal predecessors, (1198), 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) [2021-10-28 23:29:50,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1198 transitions. [2021-10-28 23:29:50,997 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1198 transitions. Word has length 81 [2021-10-28 23:29:50,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:29:50,997 INFO L470 AbstractCegarLoop]: Abstraction has 1038 states and 1198 transitions. [2021-10-28 23:29:50,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 20 states have internal predecessors, (81), 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) [2021-10-28 23:29:50,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1198 transitions. [2021-10-28 23:29:50,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-10-28 23:29:50,998 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:50,999 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:51,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-10-28 23:29:51,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-10-28 23:29:51,199 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:29:51,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:51,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1940362954, now seen corresponding path program 13 times [2021-10-28 23:29:51,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:29:51,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46519694] [2021-10-28 23:29:51,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:51,200 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:29:51,226 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:29:51,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296570844] [2021-10-28 23:29:51,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:29:51,227 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:51,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:29:51,234 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:29:51,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-10-28 23:29:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:29:52,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-28 23:29:52,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:29:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 20 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:29:52,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:29:52,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46519694] [2021-10-28 23:29:52,653 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:29:52,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296570844] [2021-10-28 23:29:52,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296570844] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:52,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:29:52,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-10-28 23:29:52,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436090475] [2021-10-28 23:29:52,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 23:29:52,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:29:52,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 23:29:52,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:29:52,655 INFO L87 Difference]: Start difference. First operand 1038 states and 1198 transitions. Second operand has 21 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 20 states have internal predecessors, (83), 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) [2021-10-28 23:29:53,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:29:53,176 INFO L93 Difference]: Finished difference Result 1346 states and 1597 transitions. [2021-10-28 23:29:53,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-28 23:29:53,177 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 20 states have internal predecessors, (83), 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 83 [2021-10-28 23:29:53,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:29:53,181 INFO L225 Difference]: With dead ends: 1346 [2021-10-28 23:29:53,181 INFO L226 Difference]: Without dead ends: 1092 [2021-10-28 23:29:53,182 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=836, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 23:29:53,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2021-10-28 23:29:53,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 1092. [2021-10-28 23:29:53,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 1.147571035747021) internal successors, (1252), 1091 states have internal predecessors, (1252), 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) [2021-10-28 23:29:53,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1252 transitions. [2021-10-28 23:29:53,390 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1252 transitions. Word has length 83 [2021-10-28 23:29:53,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:29:53,390 INFO L470 AbstractCegarLoop]: Abstraction has 1092 states and 1252 transitions. [2021-10-28 23:29:53,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 20 states have internal predecessors, (83), 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) [2021-10-28 23:29:53,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1252 transitions. [2021-10-28 23:29:53,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-10-28 23:29:53,393 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:53,393 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:53,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-10-28 23:29:53,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-10-28 23:29:53,606 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:29:53,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:53,606 INFO L85 PathProgramCache]: Analyzing trace with hash -485122832, now seen corresponding path program 11 times [2021-10-28 23:29:53,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:29:53,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78195358] [2021-10-28 23:29:53,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:53,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:29:53,658 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:29:53,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154194118] [2021-10-28 23:29:53,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:29:53,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:53,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:29:53,660 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:29:53,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-10-28 23:29:54,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-28 23:29:54,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:29:54,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-28 23:29:54,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:29:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:29:55,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:29:55,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78195358] [2021-10-28 23:29:55,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:29:55,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154194118] [2021-10-28 23:29:55,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154194118] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:55,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:29:55,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-10-28 23:29:55,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167851645] [2021-10-28 23:29:55,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 23:29:55,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:29:55,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 23:29:55,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-10-28 23:29:55,300 INFO L87 Difference]: Start difference. First operand 1092 states and 1252 transitions. Second operand has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 21 states have internal predecessors, (83), 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) [2021-10-28 23:29:55,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:29:55,852 INFO L93 Difference]: Finished difference Result 1161 states and 1333 transitions. [2021-10-28 23:29:55,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-28 23:29:55,853 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 21 states have internal predecessors, (83), 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 83 [2021-10-28 23:29:55,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:29:55,857 INFO L225 Difference]: With dead ends: 1161 [2021-10-28 23:29:55,858 INFO L226 Difference]: Without dead ends: 1151 [2021-10-28 23:29:55,858 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=485, Invalid=847, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 23:29:55,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-10-28 23:29:56,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 1082. [2021-10-28 23:29:56,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 1081 states have (on average 1.1498612395929695) internal successors, (1243), 1081 states have internal predecessors, (1243), 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) [2021-10-28 23:29:56,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 1243 transitions. [2021-10-28 23:29:56,052 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 1243 transitions. Word has length 83 [2021-10-28 23:29:56,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:29:56,052 INFO L470 AbstractCegarLoop]: Abstraction has 1082 states and 1243 transitions. [2021-10-28 23:29:56,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 21 states have internal predecessors, (83), 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) [2021-10-28 23:29:56,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 1243 transitions. [2021-10-28 23:29:56,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-28 23:29:56,054 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:56,054 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:56,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-10-28 23:29:56,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-10-28 23:29:56,255 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:29:56,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:56,255 INFO L85 PathProgramCache]: Analyzing trace with hash -963564565, now seen corresponding path program 16 times [2021-10-28 23:29:56,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:29:56,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800456676] [2021-10-28 23:29:56,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:56,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:29:56,267 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:29:56,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456293034] [2021-10-28 23:29:56,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:29:56,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:56,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:29:56,269 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:29:56,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-10-28 23:29:57,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:29:57,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:29:57,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-28 23:29:57,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:29:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 6 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:29:58,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:29:58,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800456676] [2021-10-28 23:29:58,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:29:58,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456293034] [2021-10-28 23:29:58,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456293034] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:58,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:29:58,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-10-28 23:29:58,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274201962] [2021-10-28 23:29:58,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 23:29:58,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:29:58,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 23:29:58,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-10-28 23:29:58,025 INFO L87 Difference]: Start difference. First operand 1082 states and 1243 transitions. Second operand has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:29:58,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:29:58,594 INFO L93 Difference]: Finished difference Result 1409 states and 1663 transitions. [2021-10-28 23:29:58,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-28 23:29:58,595 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-10-28 23:29:58,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:29:58,600 INFO L225 Difference]: With dead ends: 1409 [2021-10-28 23:29:58,600 INFO L226 Difference]: Without dead ends: 1159 [2021-10-28 23:29:58,601 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=516, Invalid=890, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 23:29:58,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-10-28 23:29:58,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1114. [2021-10-28 23:29:58,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 1.1500449236298294) internal successors, (1280), 1113 states have internal predecessors, (1280), 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) [2021-10-28 23:29:58,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1280 transitions. [2021-10-28 23:29:58,829 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1280 transitions. Word has length 85 [2021-10-28 23:29:58,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:29:58,829 INFO L470 AbstractCegarLoop]: Abstraction has 1114 states and 1280 transitions. [2021-10-28 23:29:58,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:29:58,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1280 transitions. [2021-10-28 23:29:58,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-10-28 23:29:58,831 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:58,831 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:58,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-10-28 23:29:59,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:59,032 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:29:59,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:59,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1548366262, now seen corresponding path program 14 times [2021-10-28 23:29:59,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:29:59,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299878358] [2021-10-28 23:29:59,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:59,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:29:59,048 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:29:59,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442597594] [2021-10-28 23:29:59,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:29:59,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:59,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:29:59,049 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:29:59,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-10-28 23:30:00,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:30:00,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:30:00,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-28 23:30:00,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:30:00,692 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 20 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:30:00,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:30:00,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299878358] [2021-10-28 23:30:00,693 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:30:00,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442597594] [2021-10-28 23:30:00,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442597594] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:30:00,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:30:00,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-10-28 23:30:00,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034606450] [2021-10-28 23:30:00,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 23:30:00,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:30:00,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 23:30:00,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-10-28 23:30:00,694 INFO L87 Difference]: Start difference. First operand 1114 states and 1280 transitions. Second operand has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 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) [2021-10-28 23:30:01,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:30:01,245 INFO L93 Difference]: Finished difference Result 1422 states and 1679 transitions. [2021-10-28 23:30:01,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-28 23:30:01,245 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 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 87 [2021-10-28 23:30:01,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:30:01,252 INFO L225 Difference]: With dead ends: 1422 [2021-10-28 23:30:01,252 INFO L226 Difference]: Without dead ends: 1168 [2021-10-28 23:30:01,254 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=552, Invalid=930, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 23:30:01,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-10-28 23:30:01,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 1168. [2021-10-28 23:30:01,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 1.143101970865467) internal successors, (1334), 1167 states have internal predecessors, (1334), 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) [2021-10-28 23:30:01,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1334 transitions. [2021-10-28 23:30:01,456 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1334 transitions. Word has length 87 [2021-10-28 23:30:01,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:30:01,456 INFO L470 AbstractCegarLoop]: Abstraction has 1168 states and 1334 transitions. [2021-10-28 23:30:01,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 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) [2021-10-28 23:30:01,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1334 transitions. [2021-10-28 23:30:01,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-10-28 23:30:01,458 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:30:01,458 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:30:01,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-10-28 23:30:01,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:30:01,659 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:30:01,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:30:01,659 INFO L85 PathProgramCache]: Analyzing trace with hash 319079428, now seen corresponding path program 12 times [2021-10-28 23:30:01,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:30:01,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285915734] [2021-10-28 23:30:01,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:30:01,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:30:01,672 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:30:01,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120552949] [2021-10-28 23:30:01,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:30:01,672 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:30:01,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:30:01,673 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:30:01,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-10-28 23:30:03,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-28 23:30:03,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:30:03,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-28 23:30:03,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:30:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:30:04,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:30:04,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285915734] [2021-10-28 23:30:04,217 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:30:04,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120552949] [2021-10-28 23:30:04,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120552949] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:30:04,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:30:04,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-10-28 23:30:04,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53027244] [2021-10-28 23:30:04,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 23:30:04,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:30:04,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 23:30:04,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:30:04,218 INFO L87 Difference]: Start difference. First operand 1168 states and 1334 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 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) [2021-10-28 23:30:04,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:30:04,830 INFO L93 Difference]: Finished difference Result 1237 states and 1415 transitions. [2021-10-28 23:30:04,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-28 23:30:04,830 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 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 87 [2021-10-28 23:30:04,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:30:04,835 INFO L225 Difference]: With dead ends: 1237 [2021-10-28 23:30:04,835 INFO L226 Difference]: Without dead ends: 1227 [2021-10-28 23:30:04,836 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=540, Invalid=942, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 23:30:04,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-10-28 23:30:05,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1158. [2021-10-28 23:30:05,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 1.1452031114952463) internal successors, (1325), 1157 states have internal predecessors, (1325), 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) [2021-10-28 23:30:05,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1325 transitions. [2021-10-28 23:30:05,029 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1325 transitions. Word has length 87 [2021-10-28 23:30:05,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:30:05,029 INFO L470 AbstractCegarLoop]: Abstraction has 1158 states and 1325 transitions. [2021-10-28 23:30:05,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 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) [2021-10-28 23:30:05,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1325 transitions. [2021-10-28 23:30:05,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-28 23:30:05,031 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:30:05,031 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:30:05,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-10-28 23:30:05,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-10-28 23:30:05,232 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:30:05,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:30:05,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1899695357, now seen corresponding path program 17 times [2021-10-28 23:30:05,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:30:05,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229551699] [2021-10-28 23:30:05,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:30:05,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:30:05,245 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:30:05,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342027285] [2021-10-28 23:30:05,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:30:05,245 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:30:05,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:30:05,247 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:30:05,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-10-28 23:30:06,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-28 23:30:06,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:30:06,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-28 23:30:06,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:30:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 8 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:30:06,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:30:06,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229551699] [2021-10-28 23:30:06,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:30:06,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342027285] [2021-10-28 23:30:06,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342027285] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:30:06,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:30:06,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-10-28 23:30:06,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269553819] [2021-10-28 23:30:06,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 23:30:06,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:30:06,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 23:30:06,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:30:06,915 INFO L87 Difference]: Start difference. First operand 1158 states and 1325 transitions. Second operand has 23 states, 23 states have (on average 3.869565217391304) internal successors, (89), 22 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) [2021-10-28 23:30:07,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:30:07,513 INFO L93 Difference]: Finished difference Result 1485 states and 1745 transitions. [2021-10-28 23:30:07,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-28 23:30:07,513 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.869565217391304) internal successors, (89), 22 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 89 [2021-10-28 23:30:07,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:30:07,516 INFO L225 Difference]: With dead ends: 1485 [2021-10-28 23:30:07,517 INFO L226 Difference]: Without dead ends: 1235 [2021-10-28 23:30:07,518 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=573, Invalid=987, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 23:30:07,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2021-10-28 23:30:07,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 1190. [2021-10-28 23:30:07,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 1.1455004205214465) internal successors, (1362), 1189 states have internal predecessors, (1362), 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) [2021-10-28 23:30:07,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1362 transitions. [2021-10-28 23:30:07,713 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1362 transitions. Word has length 89 [2021-10-28 23:30:07,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:30:07,713 INFO L470 AbstractCegarLoop]: Abstraction has 1190 states and 1362 transitions. [2021-10-28 23:30:07,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.869565217391304) internal successors, (89), 22 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) [2021-10-28 23:30:07,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1362 transitions. [2021-10-28 23:30:07,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-10-28 23:30:07,715 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:30:07,715 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:30:07,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-10-28 23:30:07,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:30:07,916 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:30:07,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:30:07,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1654446820, now seen corresponding path program 13 times [2021-10-28 23:30:07,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:30:07,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176674921] [2021-10-28 23:30:07,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:30:07,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:30:07,930 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:30:07,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849886871] [2021-10-28 23:30:07,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:30:07,931 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:30:07,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:30:07,938 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:30:07,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-10-28 23:30:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:30:09,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 23:30:09,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:30:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-10-28 23:30:09,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:30:09,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176674921] [2021-10-28 23:30:09,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:30:09,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849886871] [2021-10-28 23:30:09,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849886871] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:30:09,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:30:09,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 23:30:09,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745780809] [2021-10-28 23:30:09,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:30:09,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:30:09,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:30:09,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:30:09,498 INFO L87 Difference]: Start difference. First operand 1190 states and 1362 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 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) [2021-10-28 23:30:12,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:30:12,043 INFO L93 Difference]: Finished difference Result 1198 states and 1368 transitions. [2021-10-28 23:30:12,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:30:12,044 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 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 91 [2021-10-28 23:30:12,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:30:12,047 INFO L225 Difference]: With dead ends: 1198 [2021-10-28 23:30:12,047 INFO L226 Difference]: Without dead ends: 1188 [2021-10-28 23:30:12,048 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:30:12,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2021-10-28 23:30:12,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1124. [2021-10-28 23:30:12,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1123 states have (on average 1.130899376669635) internal successors, (1270), 1123 states have internal predecessors, (1270), 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) [2021-10-28 23:30:12,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1270 transitions. [2021-10-28 23:30:12,246 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1270 transitions. Word has length 91 [2021-10-28 23:30:12,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:30:12,246 INFO L470 AbstractCegarLoop]: Abstraction has 1124 states and 1270 transitions. [2021-10-28 23:30:12,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 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) [2021-10-28 23:30:12,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1270 transitions. [2021-10-28 23:30:12,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-10-28 23:30:12,248 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:30:12,248 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 9, 7, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:30:12,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-10-28 23:30:12,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:30:12,449 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:30:12,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:30:12,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1425181022, now seen corresponding path program 15 times [2021-10-28 23:30:12,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:30:12,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065142530] [2021-10-28 23:30:12,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:30:12,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:30:12,460 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:30:12,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430766821] [2021-10-28 23:30:12,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:30:12,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:30:12,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:30:12,461 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:30:12,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-10-28 23:30:14,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-28 23:30:14,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:30:14,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-28 23:30:14,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:30:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 20 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:30:14,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:30:14,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065142530] [2021-10-28 23:30:14,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:30:14,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430766821] [2021-10-28 23:30:14,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430766821] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:30:14,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:30:14,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-10-28 23:30:14,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563561620] [2021-10-28 23:30:14,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 23:30:14,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:30:14,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 23:30:14,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:30:14,673 INFO L87 Difference]: Start difference. First operand 1124 states and 1270 transitions. Second operand has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 22 states have internal predecessors, (91), 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) [2021-10-28 23:30:15,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:30:15,412 INFO L93 Difference]: Finished difference Result 1372 states and 1584 transitions. [2021-10-28 23:30:15,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-28 23:30:15,413 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 22 states have internal predecessors, (91), 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 91 [2021-10-28 23:30:15,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:30:15,415 INFO L225 Difference]: With dead ends: 1372 [2021-10-28 23:30:15,415 INFO L226 Difference]: Without dead ends: 1180 [2021-10-28 23:30:15,416 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=611, Invalid=1029, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 23:30:15,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-10-28 23:30:15,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1180. [2021-10-28 23:30:15,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 1.1246819338422391) internal successors, (1326), 1179 states have internal predecessors, (1326), 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) [2021-10-28 23:30:15,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1326 transitions. [2021-10-28 23:30:15,643 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1326 transitions. Word has length 91 [2021-10-28 23:30:15,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:30:15,643 INFO L470 AbstractCegarLoop]: Abstraction has 1180 states and 1326 transitions. [2021-10-28 23:30:15,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 22 states have internal predecessors, (91), 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) [2021-10-28 23:30:15,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1326 transitions. [2021-10-28 23:30:15,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-10-28 23:30:15,645 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:30:15,645 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:30:15,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-10-28 23:30:15,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-10-28 23:30:15,850 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:30:15,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:30:15,850 INFO L85 PathProgramCache]: Analyzing trace with hash -635289320, now seen corresponding path program 14 times [2021-10-28 23:30:15,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:30:15,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792491233] [2021-10-28 23:30:15,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:30:15,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:30:15,863 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:30:15,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834734810] [2021-10-28 23:30:15,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:30:15,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:30:15,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:30:15,865 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:30:15,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-10-28 23:30:17,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:30:17,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-28 23:30:17,133 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:30:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:30:17,274 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:30:17,274 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 23:30:17,275 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:30:17,278 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:30:17,278 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:30:17,279 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:30:17,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-10-28 23:30:17,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-10-28 23:30:17,493 INFO L731 BasicCegarLoop]: Path program histogram: [17, 15, 14, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:30:17,496 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:30:17,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:30:17 BoogieIcfgContainer [2021-10-28 23:30:17,624 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:30:17,624 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:30:17,624 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:30:17,625 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:30:17,625 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:25:09" (3/4) ... [2021-10-28 23:30:17,628 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 23:30:17,718 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:30:17,719 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:30:17,721 INFO L168 Benchmark]: Toolchain (without parser) took 308915.14 ms. Allocated memory was 102.8 MB in the beginning and 708.8 MB in the end (delta: 606.1 MB). Free memory was 69.2 MB in the beginning and 285.6 MB in the end (delta: -216.3 MB). Peak memory consumption was 389.6 MB. Max. memory is 16.1 GB. [2021-10-28 23:30:17,721 INFO L168 Benchmark]: CDTParser took 0.60 ms. Allocated memory is still 102.8 MB. Free memory is still 56.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:30:17,721 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.62 ms. Allocated memory is still 102.8 MB. Free memory was 69.0 MB in the beginning and 77.4 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:30:17,722 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.47 ms. Allocated memory is still 102.8 MB. Free memory was 77.4 MB in the beginning and 75.6 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:30:17,722 INFO L168 Benchmark]: Boogie Preprocessor took 30.16 ms. Allocated memory is still 102.8 MB. Free memory was 75.6 MB in the beginning and 74.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:30:17,723 INFO L168 Benchmark]: RCFGBuilder took 301.48 ms. Allocated memory is still 102.8 MB. Free memory was 74.5 MB in the beginning and 63.7 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:30:17,723 INFO L168 Benchmark]: TraceAbstraction took 308140.19 ms. Allocated memory was 102.8 MB in the beginning and 708.8 MB in the end (delta: 606.1 MB). Free memory was 63.0 MB in the beginning and 292.9 MB in the end (delta: -229.9 MB). Peak memory consumption was 380.0 MB. Max. memory is 16.1 GB. [2021-10-28 23:30:17,724 INFO L168 Benchmark]: Witness Printer took 94.72 ms. Allocated memory is still 708.8 MB. Free memory was 292.9 MB in the beginning and 285.6 MB in the end (delta: 7.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-28 23:30:17,727 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.60 ms. Allocated memory is still 102.8 MB. Free memory is still 56.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 289.62 ms. Allocated memory is still 102.8 MB. Free memory was 69.0 MB in the beginning and 77.4 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.47 ms. Allocated memory is still 102.8 MB. Free memory was 77.4 MB in the beginning and 75.6 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.16 ms. Allocated memory is still 102.8 MB. Free memory was 75.6 MB in the beginning and 74.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 301.48 ms. Allocated memory is still 102.8 MB. Free memory was 74.5 MB in the beginning and 63.7 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 308140.19 ms. Allocated memory was 102.8 MB in the beginning and 708.8 MB in the end (delta: 606.1 MB). Free memory was 63.0 MB in the beginning and 292.9 MB in the end (delta: -229.9 MB). Peak memory consumption was 380.0 MB. Max. memory is 16.1 GB. * Witness Printer took 94.72 ms. Allocated memory is still 708.8 MB. Free memory was 292.9 MB in the beginning and 285.6 MB in the end (delta: 7.3 MB). Peak memory consumption was 6.3 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: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) VAL [counter=0] [L9] COND FALSE !(!cond) VAL [counter=0] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<20 [L12] COND FALSE !(!(cond)) VAL [counter=1] [L36] COND FALSE !(!(r != 0)) VAL [counter=1] [L39] EXPR counter++ VAL [counter=2] [L39] COND TRUE counter++<20 [L12] COND FALSE !(!(cond)) VAL [counter=2] [L41] COND TRUE !(r > 0) VAL [counter=2] [L47] EXPR counter++ VAL [counter=3] [L47] COND TRUE counter++<20 [L12] COND FALSE !(!(cond)) VAL [counter=3] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [counter=3] [L47] EXPR counter++ VAL [counter=4] [L47] COND TRUE counter++<20 [L12] COND FALSE !(!(cond)) VAL [counter=4] [L49] COND TRUE !(r < 0) VAL [counter=4] [L34] EXPR counter++ VAL [counter=5] [L34] COND TRUE counter++<20 [L12] COND FALSE !(!(cond)) VAL [counter=5] [L36] COND FALSE !(!(r != 0)) VAL [counter=5] [L39] EXPR counter++ VAL [counter=6] [L39] COND TRUE counter++<20 [L12] COND FALSE !(!(cond)) VAL [counter=6] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [counter=6] [L39] EXPR counter++ VAL [counter=7] [L39] COND TRUE counter++<20 [L12] COND FALSE !(!(cond)) VAL [counter=7] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [counter=7] [L39] EXPR counter++ VAL [counter=8] [L39] COND TRUE counter++<20 [L12] COND FALSE !(!(cond)) VAL [counter=8] [L41] COND TRUE !(r > 0) VAL [counter=8] [L47] EXPR counter++ VAL [counter=9] [L47] COND TRUE counter++<20 [L12] COND FALSE !(!(cond)) VAL [counter=9] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [counter=9] [L47] EXPR counter++ VAL [counter=10] [L47] COND TRUE counter++<20 [L12] COND FALSE !(!(cond)) VAL [counter=10] [L49] COND TRUE !(r < 0) VAL [counter=10] [L34] EXPR counter++ VAL [counter=11] [L34] COND TRUE counter++<20 [L12] COND FALSE !(!(cond)) VAL [counter=11] [L36] COND FALSE !(!(r != 0)) VAL [counter=11] [L39] EXPR counter++ VAL [counter=12] [L39] COND TRUE counter++<20 [L12] COND FALSE !(!(cond)) VAL [counter=12] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [counter=12] [L39] EXPR counter++ VAL [counter=13] [L39] COND TRUE counter++<20 [L12] COND FALSE !(!(cond)) VAL [counter=13] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [counter=13] [L39] EXPR counter++ VAL [counter=14] [L39] COND TRUE counter++<20 [L12] COND FALSE !(!(cond)) VAL [counter=14] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [counter=14] [L39] EXPR counter++ VAL [counter=15] [L39] COND TRUE counter++<20 [L12] COND FALSE !(!(cond)) VAL [counter=15] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [counter=15] [L39] EXPR counter++ VAL [counter=16] [L39] COND TRUE counter++<20 [L12] COND FALSE !(!(cond)) VAL [counter=16] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [counter=16] [L39] EXPR counter++ VAL [counter=17] [L39] COND TRUE counter++<20 [L12] COND FALSE !(!(cond)) VAL [counter=17] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [counter=17] [L39] EXPR counter++ VAL [counter=18] [L39] COND TRUE counter++<20 [L12] COND FALSE !(!(cond)) VAL [counter=18] [L41] COND TRUE !(r > 0) VAL [counter=18] [L47] EXPR counter++ VAL [counter=19] [L47] COND TRUE counter++<20 [L12] COND FALSE !(!(cond)) VAL [counter=19] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [counter=19] [L47] EXPR counter++ VAL [counter=20] [L47] COND TRUE counter++<20 [L12] COND FALSE !(!(cond)) VAL [counter=20] [L49] COND TRUE !(r < 0) VAL [counter=20] [L34] EXPR counter++ VAL [counter=21] [L34] COND FALSE !(counter++<20) [L12] COND TRUE !(cond) VAL [counter=21] [L14] reach_error() VAL [counter=21] - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 307.9s, OverallIterations: 66, TraceHistogramMax: 11, PathProgramHistogramMax: 17, EmptinessCheckTime: 0.1s, AutomataDifference: 44.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1621 SDtfs, 9904 SDslu, 8622 SDs, 0 SdLazy, 3789 SolverSat, 3492 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 23.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3841 GetRequests, 2644 SyntacticMatches, 0 SemanticMatches, 1197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3116 ImplicationChecksByTransitivity, 20.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1190occurred in iteration=63, InterpolantAutomatonStates: 1307, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.2s AutomataMinimizationTime, 65 MinimizatonAttempts, 1934 StatesRemovedByMinimization, 52 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 185.8s SatisfiabilityAnalysisTime, 24.7s InterpolantComputationTime, 3504 NumberOfCodeBlocks, 3452 NumberOfCodeBlocksAsserted, 196 NumberOfCheckSat, 3348 ConstructedInterpolants, 45 QuantifiedInterpolants, 13506 SizeOfPredicates, 594 NumberOfNonLiveVariables, 12773 ConjunctsInSsa, 1389 ConjunctsInUnsatCore, 65 InterpolantComputations, 10 PerfectInterpolantSequences, 706/5864 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-28 23:30:17,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39b45d18-6041-49d9-b491-4bb1f0039f29/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...