./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be --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 9f971bd1a6fba471cdece6d295ca31488341eb806ea8364f7549d05755c7a031 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:28:25,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:28:25,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:28:25,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:28:25,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:28:25,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:28:25,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:28:25,502 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:28:25,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:28:25,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:28:25,506 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:28:25,508 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:28:25,508 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:28:25,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:28:25,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:28:25,513 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:28:25,514 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:28:25,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:28:25,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:28:25,519 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:28:25,521 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:28:25,523 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:28:25,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:28:25,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:28:25,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:28:25,529 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:28:25,530 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:28:25,531 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:28:25,531 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:28:25,533 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:28:25,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:28:25,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:28:25,535 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:28:25,536 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:28:25,537 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:28:25,538 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:28:25,539 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:28:25,539 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:28:25,539 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:28:25,540 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:28:25,541 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:28:25,542 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 19:28:25,568 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:28:25,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:28:25,569 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:28:25,569 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:28:25,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:28:25,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:28:25,571 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:28:25,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:28:25,571 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:28:25,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:28:25,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:28:25,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:28:25,572 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:28:25,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:28:25,572 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:28:25,573 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:28:25,573 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:28:25,573 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:28:25,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:28:25,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:28:25,574 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:28:25,574 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:28:25,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:28:25,574 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:28:25,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:28:25,575 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:28:25,575 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:28:25,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:28:25,575 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:28:25,576 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:28:25,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:28:25,576 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:28:25,576 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_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f971bd1a6fba471cdece6d295ca31488341eb806ea8364f7549d05755c7a031 [2021-10-21 19:28:25,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:28:25,855 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:28:25,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:28:25,859 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:28:25,860 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:28:25,861 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c [2021-10-21 19:28:25,947 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/data/0f0742412/59a8da28bfad4da392cc4fd78d8f8dd7/FLAGcd27553c1 [2021-10-21 19:28:26,392 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:28:26,392 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c [2021-10-21 19:28:26,411 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/data/0f0742412/59a8da28bfad4da392cc4fd78d8f8dd7/FLAGcd27553c1 [2021-10-21 19:28:26,773 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/data/0f0742412/59a8da28bfad4da392cc4fd78d8f8dd7 [2021-10-21 19:28:26,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:28:26,780 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:28:26,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:28:26,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:28:26,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:28:26,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:28:26" (1/1) ... [2021-10-21 19:28:26,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2922175 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:26, skipping insertion in model container [2021-10-21 19:28:26,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:28:26" (1/1) ... [2021-10-21 19:28:26,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:28:26,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:28:27,025 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_ff6d33ee-85af-4226-91cc-acff977b854c/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c[526,539] [2021-10-21 19:28:27,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:28:27,061 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:28:27,078 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_ff6d33ee-85af-4226-91cc-acff977b854c/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c[526,539] [2021-10-21 19:28:27,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:28:27,113 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:28:27,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:27 WrapperNode [2021-10-21 19:28:27,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:28:27,116 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:28:27,116 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:28:27,116 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:28:27,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:27" (1/1) ... [2021-10-21 19:28:27,132 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:27" (1/1) ... [2021-10-21 19:28:27,164 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:28:27,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:28:27,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:28:27,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:28:27,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:27" (1/1) ... [2021-10-21 19:28:27,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:27" (1/1) ... [2021-10-21 19:28:27,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:27" (1/1) ... [2021-10-21 19:28:27,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:27" (1/1) ... [2021-10-21 19:28:27,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:27" (1/1) ... [2021-10-21 19:28:27,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:27" (1/1) ... [2021-10-21 19:28:27,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:27" (1/1) ... [2021-10-21 19:28:27,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:28:27,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:28:27,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:28:27,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:28:27,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:27" (1/1) ... [2021-10-21 19:28:27,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:28:27,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:27,244 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:28:27,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:28:27,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:28:27,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:28:27,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:28:27,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:28:27,636 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:28:27,636 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2021-10-21 19:28:27,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:28:27 BoogieIcfgContainer [2021-10-21 19:28:27,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:28:27,640 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:28:27,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:28:27,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:28:27,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:28:26" (1/3) ... [2021-10-21 19:28:27,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@783817fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:28:27, skipping insertion in model container [2021-10-21 19:28:27,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:27" (2/3) ... [2021-10-21 19:28:27,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@783817fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:28:27, skipping insertion in model container [2021-10-21 19:28:27,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:28:27" (3/3) ... [2021-10-21 19:28:27,660 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound10.c [2021-10-21 19:28:27,665 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:28:27,665 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-21 19:28:27,725 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:28:27,731 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 [2021-10-21 19:28:27,732 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-21 19:28:27,746 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 38 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:27,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-21 19:28:27,751 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:27,751 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:28:27,752 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:27,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:27,757 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-10-21 19:28:27,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:27,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255303406] [2021-10-21 19:28:27,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:27,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:28,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:28,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:28,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255303406] [2021-10-21 19:28:28,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255303406] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:28:28,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:28:28,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:28:28,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362902163] [2021-10-21 19:28:28,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:28:28,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:28,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:28:28,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:28:28,073 INFO L87 Difference]: Start difference. First operand has 39 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 38 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:28,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:28,209 INFO L93 Difference]: Finished difference Result 102 states and 139 transitions. [2021-10-21 19:28:28,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:28:28,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-21 19:28:28,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:28,227 INFO L225 Difference]: With dead ends: 102 [2021-10-21 19:28:28,228 INFO L226 Difference]: Without dead ends: 57 [2021-10-21 19:28:28,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:28:28,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-21 19:28:28,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 33. [2021-10-21 19:28:28,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 32 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) [2021-10-21 19:28:28,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-10-21 19:28:28,261 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2021-10-21 19:28:28,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:28,262 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-10-21 19:28:28,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:28,262 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-10-21 19:28:28,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-21 19:28:28,263 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:28,263 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:28,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:28:28,264 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:28,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:28,265 INFO L82 PathProgramCache]: Analyzing trace with hash 178921133, now seen corresponding path program 1 times [2021-10-21 19:28:28,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:28,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562150677] [2021-10-21 19:28:28,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:28,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:28,280 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:28,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769451906] [2021-10-21 19:28:28,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:28,281 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:28,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:28,286 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:28,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:28:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:28,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:28:28,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:28,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:28,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:28,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562150677] [2021-10-21 19:28:28,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:28,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769451906] [2021-10-21 19:28:28,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769451906] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:28:28,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:28:28,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:28:28,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835587387] [2021-10-21 19:28:28,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:28:28,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:28,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:28:28,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:28:28,406 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:28,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:28,422 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-10-21 19:28:28,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:28:28,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-21 19:28:28,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:28,424 INFO L225 Difference]: With dead ends: 54 [2021-10-21 19:28:28,424 INFO L226 Difference]: Without dead ends: 35 [2021-10-21 19:28:28,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:28:28,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-21 19:28:28,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-10-21 19:28:28,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 34 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) [2021-10-21 19:28:28,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-10-21 19:28:28,433 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 8 [2021-10-21 19:28:28,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:28,433 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-10-21 19:28:28,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:28,434 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-10-21 19:28:28,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-21 19:28:28,434 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:28,434 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:28,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:28,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-21 19:28:28,648 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:28,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:28,649 INFO L82 PathProgramCache]: Analyzing trace with hash 179657965, now seen corresponding path program 1 times [2021-10-21 19:28:28,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:28,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964033946] [2021-10-21 19:28:28,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:28,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:28,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:28,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964033946] [2021-10-21 19:28:28,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964033946] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:28:28,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:28:28,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:28:28,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106737950] [2021-10-21 19:28:28,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:28:28,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:28,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:28:28,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:28:28,703 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:28,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:28,761 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-10-21 19:28:28,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:28:28,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-21 19:28:28,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:28,763 INFO L225 Difference]: With dead ends: 54 [2021-10-21 19:28:28,763 INFO L226 Difference]: Without dead ends: 52 [2021-10-21 19:28:28,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:28:28,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-21 19:28:28,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 33. [2021-10-21 19:28:28,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 32 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) [2021-10-21 19:28:28,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-10-21 19:28:28,771 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 8 [2021-10-21 19:28:28,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:28,771 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-10-21 19:28:28,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:28,772 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-10-21 19:28:28,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:28:28,772 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:28,772 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:28,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:28:28,773 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:28,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:28,774 INFO L82 PathProgramCache]: Analyzing trace with hash 852768432, now seen corresponding path program 1 times [2021-10-21 19:28:28,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:28,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781477099] [2021-10-21 19:28:28,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:28,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:28,787 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:28,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317221754] [2021-10-21 19:28:28,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:28,788 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:28,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:28,789 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:28,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:28:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:28,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:28:28,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:29,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:29,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781477099] [2021-10-21 19:28:29,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:29,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317221754] [2021-10-21 19:28:29,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317221754] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:28:29,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:28:29,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:28:29,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163711413] [2021-10-21 19:28:29,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:28:29,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:29,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:28:29,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:28:29,047 INFO L87 Difference]: Start difference. First operand 33 states and 37 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) [2021-10-21 19:28:29,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:29,149 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2021-10-21 19:28:29,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:28:29,149 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 [2021-10-21 19:28:29,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:29,150 INFO L225 Difference]: With dead ends: 79 [2021-10-21 19:28:29,150 INFO L226 Difference]: Without dead ends: 56 [2021-10-21 19:28:29,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:28:29,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-21 19:28:29,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2021-10-21 19:28:29,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:29,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-10-21 19:28:29,159 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 10 [2021-10-21 19:28:29,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:29,169 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-10-21 19:28:29,170 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) [2021-10-21 19:28:29,170 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-10-21 19:28:29,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 19:28:29,170 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:29,171 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:29,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:29,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:29,387 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:29,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:29,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1265846374, now seen corresponding path program 1 times [2021-10-21 19:28:29,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:29,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429153218] [2021-10-21 19:28:29,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:29,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:29,409 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:29,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1985428221] [2021-10-21 19:28:29,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:29,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:29,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:29,412 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:29,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:28:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:29,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:28:29,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:29,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:29,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:29,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429153218] [2021-10-21 19:28:29,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:29,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985428221] [2021-10-21 19:28:29,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985428221] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:28:29,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:28:29,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:28:29,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245985963] [2021-10-21 19:28:29,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:28:29,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:29,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:28:29,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:28:29,657 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:29,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:29,737 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2021-10-21 19:28:29,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:28:29,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-21 19:28:29,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:29,745 INFO L225 Difference]: With dead ends: 66 [2021-10-21 19:28:29,746 INFO L226 Difference]: Without dead ends: 54 [2021-10-21 19:28:29,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:28:29,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-21 19:28:29,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2021-10-21 19:28:29,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.302325581395349) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:29,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-10-21 19:28:29,757 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 14 [2021-10-21 19:28:29,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:29,758 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-10-21 19:28:29,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:29,758 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-10-21 19:28:29,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:28:29,759 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:29,759 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:29,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:29,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:29,976 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:29,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:29,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1486360258, now seen corresponding path program 1 times [2021-10-21 19:28:29,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:29,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174103002] [2021-10-21 19:28:29,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:29,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:29,989 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:29,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015220514] [2021-10-21 19:28:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:29,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:29,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:29,991 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:29,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:28:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:30,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:28:30,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:30,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:30,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174103002] [2021-10-21 19:28:30,130 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:30,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015220514] [2021-10-21 19:28:30,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015220514] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:30,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:30,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-21 19:28:30,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568686941] [2021-10-21 19:28:30,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:28:30,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:30,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:28:30,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:28:30,133 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:30,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:30,155 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2021-10-21 19:28:30,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:28:30,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-21 19:28:30,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:30,157 INFO L225 Difference]: With dead ends: 78 [2021-10-21 19:28:30,157 INFO L226 Difference]: Without dead ends: 50 [2021-10-21 19:28:30,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:28:30,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-21 19:28:30,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-10-21 19:28:30,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.288888888888889) internal successors, (58), 49 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) [2021-10-21 19:28:30,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-10-21 19:28:30,164 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 18 [2021-10-21 19:28:30,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:30,165 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-10-21 19:28:30,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:30,165 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-10-21 19:28:30,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:28:30,166 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:30,166 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:30,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:30,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:30,387 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:30,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:30,387 INFO L82 PathProgramCache]: Analyzing trace with hash -2100512702, now seen corresponding path program 1 times [2021-10-21 19:28:30,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:30,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770433352] [2021-10-21 19:28:30,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:30,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:30,399 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:30,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508763299] [2021-10-21 19:28:30,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:30,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:30,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:30,401 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:30,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:28:30,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:30,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:28:30,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:30,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:30,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770433352] [2021-10-21 19:28:30,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:30,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508763299] [2021-10-21 19:28:30,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508763299] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:30,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:30,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-21 19:28:30,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667511544] [2021-10-21 19:28:30,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:28:30,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:30,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:28:30,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:28:30,691 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:30,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:30,827 INFO L93 Difference]: Finished difference Result 126 states and 152 transitions. [2021-10-21 19:28:30,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:28:30,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-21 19:28:30,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:30,831 INFO L225 Difference]: With dead ends: 126 [2021-10-21 19:28:30,831 INFO L226 Difference]: Without dead ends: 86 [2021-10-21 19:28:30,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:28:30,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-21 19:28:30,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2021-10-21 19:28:30,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 70 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) [2021-10-21 19:28:30,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2021-10-21 19:28:30,855 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 18 [2021-10-21 19:28:30,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:30,855 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2021-10-21 19:28:30,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:30,856 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2021-10-21 19:28:30,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-21 19:28:30,857 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:30,857 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:30,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:31,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:31,058 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:31,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:31,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1057713026, now seen corresponding path program 1 times [2021-10-21 19:28:31,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:31,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365690830] [2021-10-21 19:28:31,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:31,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:31,067 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:31,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549472591] [2021-10-21 19:28:31,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:31,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:31,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:31,068 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:31,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:28:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:31,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:28:31,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:31,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:31,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365690830] [2021-10-21 19:28:31,271 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:31,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549472591] [2021-10-21 19:28:31,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549472591] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:31,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:31,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-21 19:28:31,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192830951] [2021-10-21 19:28:31,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:28:31,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:31,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:28:31,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:28:31,274 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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) [2021-10-21 19:28:31,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:31,294 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2021-10-21 19:28:31,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:28:31,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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 [2021-10-21 19:28:31,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:31,296 INFO L225 Difference]: With dead ends: 78 [2021-10-21 19:28:31,296 INFO L226 Difference]: Without dead ends: 72 [2021-10-21 19:28:31,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:28:31,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-21 19:28:31,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-10-21 19:28:31,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 70 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) [2021-10-21 19:28:31,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2021-10-21 19:28:31,315 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 25 [2021-10-21 19:28:31,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:31,315 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2021-10-21 19:28:31,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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) [2021-10-21 19:28:31,316 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2021-10-21 19:28:31,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 19:28:31,317 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:31,317 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:31,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-21 19:28:31,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:31,518 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:31,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:31,518 INFO L82 PathProgramCache]: Analyzing trace with hash 998694484, now seen corresponding path program 2 times [2021-10-21 19:28:31,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:31,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831961507] [2021-10-21 19:28:31,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:31,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:31,530 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:31,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561421630] [2021-10-21 19:28:31,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:28:31,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:31,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:31,531 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:31,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:28:31,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-21 19:28:31,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:31,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:28:31,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:31,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-21 19:28:31,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:31,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831961507] [2021-10-21 19:28:31,744 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:31,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561421630] [2021-10-21 19:28:31,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561421630] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:28:31,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:28:31,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:28:31,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663747502] [2021-10-21 19:28:31,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:28:31,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:31,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:28:31,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:28:31,746 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:31,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:31,776 INFO L93 Difference]: Finished difference Result 107 states and 124 transitions. [2021-10-21 19:28:31,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:28:31,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-21 19:28:31,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:31,778 INFO L225 Difference]: With dead ends: 107 [2021-10-21 19:28:31,778 INFO L226 Difference]: Without dead ends: 79 [2021-10-21 19:28:31,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:28:31,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-21 19:28:31,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 73. [2021-10-21 19:28:31,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 72 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) [2021-10-21 19:28:31,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2021-10-21 19:28:31,795 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 26 [2021-10-21 19:28:31,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:31,795 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2021-10-21 19:28:31,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:31,795 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2021-10-21 19:28:31,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 19:28:31,801 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:31,801 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2021-10-21 19:28:31,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:32,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:32,027 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:32,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:32,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1706788820, now seen corresponding path program 2 times [2021-10-21 19:28:32,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:32,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304744404] [2021-10-21 19:28:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:32,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:32,045 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:32,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175369238] [2021-10-21 19:28:32,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:28:32,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:32,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:32,047 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:32,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:28:32,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:28:32,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:32,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 19:28:32,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:32,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:32,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304744404] [2021-10-21 19:28:32,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:32,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175369238] [2021-10-21 19:28:32,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175369238] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:32,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:32,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 19:28:32,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970297995] [2021-10-21 19:28:32,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:28:32,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:32,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:28:32,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:28:32,536 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:32,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:32,771 INFO L93 Difference]: Finished difference Result 182 states and 218 transitions. [2021-10-21 19:28:32,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:28:32,772 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-21 19:28:32,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:32,773 INFO L225 Difference]: With dead ends: 182 [2021-10-21 19:28:32,773 INFO L226 Difference]: Without dead ends: 141 [2021-10-21 19:28:32,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:28:32,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-10-21 19:28:32,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 97. [2021-10-21 19:28:32,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.2608695652173914) internal successors, (116), 96 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:32,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 116 transitions. [2021-10-21 19:28:32,803 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 116 transitions. Word has length 26 [2021-10-21 19:28:32,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:32,805 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 116 transitions. [2021-10-21 19:28:32,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:32,805 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 116 transitions. [2021-10-21 19:28:32,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:28:32,806 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:32,807 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:32,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:33,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-21 19:28:33,023 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:33,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:33,023 INFO L82 PathProgramCache]: Analyzing trace with hash 864374201, now seen corresponding path program 1 times [2021-10-21 19:28:33,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:33,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234243960] [2021-10-21 19:28:33,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:33,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:33,034 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:33,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971056896] [2021-10-21 19:28:33,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:33,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:33,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:33,036 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:33,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:28:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:33,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:28:33,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:33,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:33,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234243960] [2021-10-21 19:28:33,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:33,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971056896] [2021-10-21 19:28:33,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971056896] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:33,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:33,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-21 19:28:33,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716876903] [2021-10-21 19:28:33,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:28:33,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:33,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:28:33,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:28:33,258 INFO L87 Difference]: Start difference. First operand 97 states and 116 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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) [2021-10-21 19:28:33,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:33,289 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2021-10-21 19:28:33,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:28:33,289 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 [2021-10-21 19:28:33,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:33,291 INFO L225 Difference]: With dead ends: 105 [2021-10-21 19:28:33,291 INFO L226 Difference]: Without dead ends: 97 [2021-10-21 19:28:33,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:28:33,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-21 19:28:33,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-10-21 19:28:33,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.25) internal successors, (115), 96 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) [2021-10-21 19:28:33,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 115 transitions. [2021-10-21 19:28:33,302 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 115 transitions. Word has length 27 [2021-10-21 19:28:33,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:33,302 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 115 transitions. [2021-10-21 19:28:33,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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) [2021-10-21 19:28:33,302 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 115 transitions. [2021-10-21 19:28:33,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-21 19:28:33,306 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:33,307 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:33,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:33,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-21 19:28:33,526 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:33,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:33,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1388472819, now seen corresponding path program 1 times [2021-10-21 19:28:33,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:33,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268543522] [2021-10-21 19:28:33,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:33,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:33,538 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:33,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804422816] [2021-10-21 19:28:33,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:33,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:33,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:33,540 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:33,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:28:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:33,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-21 19:28:33,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:34,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:34,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268543522] [2021-10-21 19:28:34,231 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:34,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804422816] [2021-10-21 19:28:34,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804422816] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:34,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:34,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 19:28:34,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541925571] [2021-10-21 19:28:34,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:28:34,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:34,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:28:34,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:28:34,233 INFO L87 Difference]: Start difference. First operand 97 states and 115 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 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) [2021-10-21 19:28:34,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:34,362 INFO L93 Difference]: Finished difference Result 115 states and 133 transitions. [2021-10-21 19:28:34,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:28:34,363 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 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 [2021-10-21 19:28:34,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:34,364 INFO L225 Difference]: With dead ends: 115 [2021-10-21 19:28:34,364 INFO L226 Difference]: Without dead ends: 113 [2021-10-21 19:28:34,364 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:28:34,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-21 19:28:34,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 105. [2021-10-21 19:28:34,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.24) internal successors, (124), 104 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:34,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 124 transitions. [2021-10-21 19:28:34,373 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 124 transitions. Word has length 29 [2021-10-21 19:28:34,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:34,373 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 124 transitions. [2021-10-21 19:28:34,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 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) [2021-10-21 19:28:34,374 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 124 transitions. [2021-10-21 19:28:34,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 19:28:34,374 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:34,374 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:34,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:34,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-21 19:28:34,602 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:34,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:34,603 INFO L82 PathProgramCache]: Analyzing trace with hash -93011142, now seen corresponding path program 1 times [2021-10-21 19:28:34,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:34,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014264916] [2021-10-21 19:28:34,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:34,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:34,614 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:34,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384502930] [2021-10-21 19:28:34,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:34,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:34,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:34,617 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:34,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:28:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:34,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:28:34,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:34,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:34,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014264916] [2021-10-21 19:28:34,895 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:34,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384502930] [2021-10-21 19:28:34,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384502930] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:34,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:34,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 19:28:34,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794882527] [2021-10-21 19:28:34,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:28:34,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:34,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:28:34,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:28:34,897 INFO L87 Difference]: Start difference. First operand 105 states and 124 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:34,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:34,926 INFO L93 Difference]: Finished difference Result 116 states and 133 transitions. [2021-10-21 19:28:34,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:28:34,927 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-21 19:28:34,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:34,930 INFO L225 Difference]: With dead ends: 116 [2021-10-21 19:28:34,930 INFO L226 Difference]: Without dead ends: 106 [2021-10-21 19:28:34,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:28:34,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-21 19:28:34,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-10-21 19:28:34,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.22) internal successors, (122), 104 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:34,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 122 transitions. [2021-10-21 19:28:34,940 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 122 transitions. Word has length 30 [2021-10-21 19:28:34,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:34,940 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 122 transitions. [2021-10-21 19:28:34,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:34,941 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 122 transitions. [2021-10-21 19:28:34,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-21 19:28:34,942 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:34,942 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2021-10-21 19:28:34,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:35,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:35,158 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:35,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:35,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1601348966, now seen corresponding path program 3 times [2021-10-21 19:28:35,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:35,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293786803] [2021-10-21 19:28:35,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:35,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:35,170 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:35,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863112713] [2021-10-21 19:28:35,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:28:35,171 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:35,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:35,172 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:35,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:28:35,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:28:35,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:35,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-21 19:28:35,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-21 19:28:35,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:35,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293786803] [2021-10-21 19:28:35,637 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:35,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863112713] [2021-10-21 19:28:35,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863112713] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:35,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:35,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 19:28:35,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474124882] [2021-10-21 19:28:35,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:28:35,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:35,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:28:35,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:28:35,640 INFO L87 Difference]: Start difference. First operand 105 states and 122 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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) [2021-10-21 19:28:35,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:35,795 INFO L93 Difference]: Finished difference Result 123 states and 141 transitions. [2021-10-21 19:28:35,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:28:35,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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 34 [2021-10-21 19:28:35,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:35,797 INFO L225 Difference]: With dead ends: 123 [2021-10-21 19:28:35,797 INFO L226 Difference]: Without dead ends: 113 [2021-10-21 19:28:35,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:28:35,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-21 19:28:35,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 107. [2021-10-21 19:28:35,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 104 states have (on average 1.1923076923076923) internal successors, (124), 106 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:35,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 124 transitions. [2021-10-21 19:28:35,808 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 124 transitions. Word has length 34 [2021-10-21 19:28:35,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:35,808 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 124 transitions. [2021-10-21 19:28:35,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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) [2021-10-21 19:28:35,809 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 124 transitions. [2021-10-21 19:28:35,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-21 19:28:35,809 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:35,809 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:35,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:36,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:36,022 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:36,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:36,023 INFO L82 PathProgramCache]: Analyzing trace with hash 894098064, now seen corresponding path program 1 times [2021-10-21 19:28:36,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:36,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030606254] [2021-10-21 19:28:36,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:36,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:36,033 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:36,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [669444647] [2021-10-21 19:28:36,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:36,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:36,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:36,034 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:36,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:28:36,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:36,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-21 19:28:36,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:36,722 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:36,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:36,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030606254] [2021-10-21 19:28:36,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:36,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669444647] [2021-10-21 19:28:36,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669444647] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:36,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:36,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 19:28:36,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389274923] [2021-10-21 19:28:36,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:28:36,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:36,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:28:36,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:28:36,725 INFO L87 Difference]: Start difference. First operand 107 states and 124 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 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) [2021-10-21 19:28:36,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:36,863 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2021-10-21 19:28:36,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:28:36,864 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 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 34 [2021-10-21 19:28:36,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:36,865 INFO L225 Difference]: With dead ends: 114 [2021-10-21 19:28:36,865 INFO L226 Difference]: Without dead ends: 97 [2021-10-21 19:28:36,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:28:36,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-21 19:28:36,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-10-21 19:28:36,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 94 states have (on average 1.202127659574468) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:36,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2021-10-21 19:28:36,875 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 34 [2021-10-21 19:28:36,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:36,876 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2021-10-21 19:28:36,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 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) [2021-10-21 19:28:36,876 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2021-10-21 19:28:36,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-21 19:28:36,876 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:36,877 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:36,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:37,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-21 19:28:37,097 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:37,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:37,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1890706023, now seen corresponding path program 2 times [2021-10-21 19:28:37,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:37,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058503334] [2021-10-21 19:28:37,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:37,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:37,108 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:37,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [292575977] [2021-10-21 19:28:37,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:28:37,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:37,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:37,109 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:37,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 19:28:37,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:28:37,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:37,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:28:37,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:37,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:37,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058503334] [2021-10-21 19:28:37,471 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:37,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292575977] [2021-10-21 19:28:37,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292575977] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:37,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:37,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 19:28:37,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543773907] [2021-10-21 19:28:37,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:28:37,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:37,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:28:37,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:28:37,474 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-10-21 19:28:37,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:37,513 INFO L93 Difference]: Finished difference Result 107 states and 123 transitions. [2021-10-21 19:28:37,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:28:37,514 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 [2021-10-21 19:28:37,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:37,515 INFO L225 Difference]: With dead ends: 107 [2021-10-21 19:28:37,515 INFO L226 Difference]: Without dead ends: 99 [2021-10-21 19:28:37,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:28:37,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-21 19:28:37,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-10-21 19:28:37,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 96 states have (on average 1.1979166666666667) internal successors, (115), 98 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) [2021-10-21 19:28:37,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 115 transitions. [2021-10-21 19:28:37,525 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 115 transitions. Word has length 35 [2021-10-21 19:28:37,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:37,525 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 115 transitions. [2021-10-21 19:28:37,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-10-21 19:28:37,525 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 115 transitions. [2021-10-21 19:28:37,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 19:28:37,526 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:37,526 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:37,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:37,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-21 19:28:37,742 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:37,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:37,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1368897339, now seen corresponding path program 2 times [2021-10-21 19:28:37,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:37,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189426481] [2021-10-21 19:28:37,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:37,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:37,753 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:37,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696634266] [2021-10-21 19:28:37,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:28:37,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:37,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:37,755 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:37,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 19:28:38,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:28:38,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:38,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-21 19:28:38,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:38,728 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:38,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:38,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189426481] [2021-10-21 19:28:38,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:38,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696634266] [2021-10-21 19:28:38,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696634266] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:38,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:38,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 19:28:38,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954306782] [2021-10-21 19:28:38,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:28:38,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:38,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:28:38,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:28:38,731 INFO L87 Difference]: Start difference. First operand 99 states and 115 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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) [2021-10-21 19:28:38,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:38,957 INFO L93 Difference]: Finished difference Result 126 states and 142 transitions. [2021-10-21 19:28:38,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:28:38,958 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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 [2021-10-21 19:28:38,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:38,959 INFO L225 Difference]: With dead ends: 126 [2021-10-21 19:28:38,959 INFO L226 Difference]: Without dead ends: 124 [2021-10-21 19:28:38,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:28:38,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-21 19:28:38,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 102. [2021-10-21 19:28:38,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 99 states have (on average 1.1919191919191918) internal successors, (118), 101 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:38,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 118 transitions. [2021-10-21 19:28:38,970 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 118 transitions. Word has length 37 [2021-10-21 19:28:38,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:38,970 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 118 transitions. [2021-10-21 19:28:38,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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) [2021-10-21 19:28:38,970 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 118 transitions. [2021-10-21 19:28:38,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-21 19:28:38,971 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:38,971 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:39,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:39,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-21 19:28:39,194 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:39,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:39,195 INFO L82 PathProgramCache]: Analyzing trace with hash -513882164, now seen corresponding path program 2 times [2021-10-21 19:28:39,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:39,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466313534] [2021-10-21 19:28:39,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:39,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:39,205 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:39,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1788246005] [2021-10-21 19:28:39,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:28:39,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:39,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:39,207 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:39,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 19:28:39,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:28:39,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:39,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:28:39,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:39,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:39,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466313534] [2021-10-21 19:28:39,634 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:39,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788246005] [2021-10-21 19:28:39,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788246005] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:39,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:39,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 19:28:39,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283714473] [2021-10-21 19:28:39,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:28:39,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:39,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:28:39,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:28:39,636 INFO L87 Difference]: Start difference. First operand 102 states and 118 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-10-21 19:28:39,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:39,677 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2021-10-21 19:28:39,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:28:39,677 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 38 [2021-10-21 19:28:39,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:39,678 INFO L225 Difference]: With dead ends: 121 [2021-10-21 19:28:39,679 INFO L226 Difference]: Without dead ends: 111 [2021-10-21 19:28:39,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:28:39,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-21 19:28:39,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2021-10-21 19:28:39,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 109 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:39,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2021-10-21 19:28:39,689 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 38 [2021-10-21 19:28:39,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:39,689 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2021-10-21 19:28:39,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-10-21 19:28:39,690 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2021-10-21 19:28:39,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-21 19:28:39,690 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:39,690 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:39,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:39,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-21 19:28:39,914 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:39,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:39,915 INFO L82 PathProgramCache]: Analyzing trace with hash 411953429, now seen corresponding path program 3 times [2021-10-21 19:28:39,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:39,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178944169] [2021-10-21 19:28:39,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:39,915 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:39,924 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:39,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078758723] [2021-10-21 19:28:39,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:28:39,925 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:39,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:39,926 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:39,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 19:28:40,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-21 19:28:40,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:40,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:28:40,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:40,443 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:40,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:40,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178944169] [2021-10-21 19:28:40,444 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:40,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078758723] [2021-10-21 19:28:40,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078758723] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:40,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:40,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 19:28:40,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619937755] [2021-10-21 19:28:40,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:28:40,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:40,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:28:40,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:28:40,448 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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) [2021-10-21 19:28:40,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:40,505 INFO L93 Difference]: Finished difference Result 120 states and 135 transitions. [2021-10-21 19:28:40,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:28:40,505 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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 [2021-10-21 19:28:40,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:40,506 INFO L225 Difference]: With dead ends: 120 [2021-10-21 19:28:40,506 INFO L226 Difference]: Without dead ends: 112 [2021-10-21 19:28:40,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:28:40,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-21 19:28:40,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-10-21 19:28:40,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 109 states have (on average 1.165137614678899) internal successors, (127), 111 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:40,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 127 transitions. [2021-10-21 19:28:40,518 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 127 transitions. Word has length 43 [2021-10-21 19:28:40,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:40,519 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 127 transitions. [2021-10-21 19:28:40,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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) [2021-10-21 19:28:40,519 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 127 transitions. [2021-10-21 19:28:40,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-21 19:28:40,520 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:40,520 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-21 19:28:40,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:40,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:40,742 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:40,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:40,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1687535646, now seen corresponding path program 3 times [2021-10-21 19:28:40,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:40,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92361438] [2021-10-21 19:28:40,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:40,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:40,750 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:40,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657215315] [2021-10-21 19:28:40,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:28:40,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:40,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:40,752 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:40,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 19:28:41,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:28:41,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:41,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 19:28:41,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:41,732 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-21 19:28:41,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:41,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92361438] [2021-10-21 19:28:41,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:41,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657215315] [2021-10-21 19:28:41,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657215315] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:41,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:41,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 19:28:41,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923658129] [2021-10-21 19:28:41,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:28:41,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:41,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:28:41,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:28:41,738 INFO L87 Difference]: Start difference. First operand 112 states and 127 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 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) [2021-10-21 19:28:41,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:41,848 INFO L93 Difference]: Finished difference Result 112 states and 127 transitions. [2021-10-21 19:28:41,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:28:41,848 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 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) Word has length 44 [2021-10-21 19:28:41,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:41,849 INFO L225 Difference]: With dead ends: 112 [2021-10-21 19:28:41,849 INFO L226 Difference]: Without dead ends: 110 [2021-10-21 19:28:41,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:28:41,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-21 19:28:41,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2021-10-21 19:28:41,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 105 states have (on average 1.1428571428571428) internal successors, (120), 106 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) [2021-10-21 19:28:41,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 120 transitions. [2021-10-21 19:28:41,865 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 120 transitions. Word has length 44 [2021-10-21 19:28:41,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:41,865 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 120 transitions. [2021-10-21 19:28:41,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 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) [2021-10-21 19:28:41,866 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 120 transitions. [2021-10-21 19:28:41,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-21 19:28:41,866 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:41,866 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:41,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:42,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:42,094 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:42,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:42,095 INFO L82 PathProgramCache]: Analyzing trace with hash 773970761, now seen corresponding path program 3 times [2021-10-21 19:28:42,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:42,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848523980] [2021-10-21 19:28:42,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:42,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:42,103 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:42,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051621519] [2021-10-21 19:28:42,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:28:42,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:42,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:42,105 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:42,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 19:28:42,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 19:28:42,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:42,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:28:42,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:42,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:42,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848523980] [2021-10-21 19:28:42,637 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:42,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051621519] [2021-10-21 19:28:42,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051621519] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:42,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:42,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 19:28:42,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716606598] [2021-10-21 19:28:42,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:28:42,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:42,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:28:42,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:28:42,640 INFO L87 Difference]: Start difference. First operand 107 states and 120 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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) [2021-10-21 19:28:42,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:42,688 INFO L93 Difference]: Finished difference Result 137 states and 154 transitions. [2021-10-21 19:28:42,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:28:42,688 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 [2021-10-21 19:28:42,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:42,690 INFO L225 Difference]: With dead ends: 137 [2021-10-21 19:28:42,690 INFO L226 Difference]: Without dead ends: 125 [2021-10-21 19:28:42,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:28:42,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-21 19:28:42,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2021-10-21 19:28:42,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 122 states have (on average 1.1311475409836065) internal successors, (138), 123 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) [2021-10-21 19:28:42,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 138 transitions. [2021-10-21 19:28:42,704 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 138 transitions. Word has length 45 [2021-10-21 19:28:42,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:42,705 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 138 transitions. [2021-10-21 19:28:42,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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) [2021-10-21 19:28:42,705 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 138 transitions. [2021-10-21 19:28:42,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-21 19:28:42,706 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:42,706 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:42,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:42,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-21 19:28:42,922 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:42,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:42,923 INFO L82 PathProgramCache]: Analyzing trace with hash 494883615, now seen corresponding path program 2 times [2021-10-21 19:28:42,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:42,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247653232] [2021-10-21 19:28:42,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:42,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:42,941 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:42,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [206480598] [2021-10-21 19:28:42,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:28:42,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:42,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:42,944 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:42,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 19:28:43,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-21 19:28:43,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:43,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:28:43,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-21 19:28:43,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:43,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247653232] [2021-10-21 19:28:43,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:43,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206480598] [2021-10-21 19:28:43,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206480598] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:43,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:43,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 19:28:43,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231850965] [2021-10-21 19:28:43,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:28:43,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:43,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:28:43,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:28:43,587 INFO L87 Difference]: Start difference. First operand 124 states and 138 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:43,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:43,765 INFO L93 Difference]: Finished difference Result 134 states and 147 transitions. [2021-10-21 19:28:43,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:28:43,766 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-10-21 19:28:43,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:43,767 INFO L225 Difference]: With dead ends: 134 [2021-10-21 19:28:43,767 INFO L226 Difference]: Without dead ends: 95 [2021-10-21 19:28:43,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:28:43,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-21 19:28:43,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2021-10-21 19:28:43,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 86 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:43,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2021-10-21 19:28:43,777 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 49 [2021-10-21 19:28:43,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:43,778 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2021-10-21 19:28:43,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:43,778 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2021-10-21 19:28:43,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-21 19:28:43,779 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:43,779 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:43,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:44,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:44,002 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:44,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:44,003 INFO L82 PathProgramCache]: Analyzing trace with hash -2054725181, now seen corresponding path program 4 times [2021-10-21 19:28:44,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:44,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91847010] [2021-10-21 19:28:44,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:44,003 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:44,017 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:44,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891278190] [2021-10-21 19:28:44,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:28:44,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:44,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:44,021 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:44,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-21 19:28:44,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:28:44,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:44,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:28:44,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:44,588 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:44,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:44,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91847010] [2021-10-21 19:28:44,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:44,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891278190] [2021-10-21 19:28:44,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891278190] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:44,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:44,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 19:28:44,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709569505] [2021-10-21 19:28:44,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:28:44,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:44,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:28:44,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:28:44,591 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 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) [2021-10-21 19:28:44,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:44,663 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2021-10-21 19:28:44,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:28:44,663 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 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 [2021-10-21 19:28:44,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:44,664 INFO L225 Difference]: With dead ends: 97 [2021-10-21 19:28:44,664 INFO L226 Difference]: Without dead ends: 89 [2021-10-21 19:28:44,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:28:44,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-21 19:28:44,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-10-21 19:28:44,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 87 states have (on average 1.1149425287356323) internal successors, (97), 88 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) [2021-10-21 19:28:44,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2021-10-21 19:28:44,675 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 51 [2021-10-21 19:28:44,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:44,676 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2021-10-21 19:28:44,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 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) [2021-10-21 19:28:44,676 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2021-10-21 19:28:44,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-21 19:28:44,677 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:44,677 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:44,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:44,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:44,902 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:44,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:44,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1117773943, now seen corresponding path program 4 times [2021-10-21 19:28:44,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:44,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552982793] [2021-10-21 19:28:44,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:44,903 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:44,915 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:44,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4740724] [2021-10-21 19:28:44,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:28:44,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:44,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:44,917 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:44,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-21 19:28:45,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:28:45,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:45,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:28:45,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:45,521 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:45,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:45,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552982793] [2021-10-21 19:28:45,521 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:45,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4740724] [2021-10-21 19:28:45,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4740724] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:45,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:45,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 19:28:45,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803089594] [2021-10-21 19:28:45,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:28:45,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:45,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:28:45,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:28:45,523 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 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) [2021-10-21 19:28:45,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:45,579 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2021-10-21 19:28:45,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:28:45,579 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 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 [2021-10-21 19:28:45,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:45,580 INFO L225 Difference]: With dead ends: 120 [2021-10-21 19:28:45,580 INFO L226 Difference]: Without dead ends: 110 [2021-10-21 19:28:45,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:28:45,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-21 19:28:45,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-10-21 19:28:45,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.1214953271028036) internal successors, (120), 108 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) [2021-10-21 19:28:45,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2021-10-21 19:28:45,594 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 53 [2021-10-21 19:28:45,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:45,594 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2021-10-21 19:28:45,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 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) [2021-10-21 19:28:45,595 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2021-10-21 19:28:45,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-21 19:28:45,595 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:45,595 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:45,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:45,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-21 19:28:45,814 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:45,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:45,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1005826959, now seen corresponding path program 5 times [2021-10-21 19:28:45,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:45,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058522566] [2021-10-21 19:28:45,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:45,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:45,831 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:45,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255607660] [2021-10-21 19:28:45,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:28:45,832 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:45,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:45,833 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:45,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-21 19:28:46,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-21 19:28:46,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:46,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:28:46,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:46,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:46,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058522566] [2021-10-21 19:28:46,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:46,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255607660] [2021-10-21 19:28:46,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255607660] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:46,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:46,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 19:28:46,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177629486] [2021-10-21 19:28:46,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:28:46,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:46,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:28:46,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:28:46,486 INFO L87 Difference]: Start difference. First operand 109 states and 120 transitions. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 9 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) [2021-10-21 19:28:46,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:46,583 INFO L93 Difference]: Finished difference Result 119 states and 130 transitions. [2021-10-21 19:28:46,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:28:46,584 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 9 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 [2021-10-21 19:28:46,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:46,585 INFO L225 Difference]: With dead ends: 119 [2021-10-21 19:28:46,585 INFO L226 Difference]: Without dead ends: 111 [2021-10-21 19:28:46,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:28:46,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-21 19:28:46,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-10-21 19:28:46,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 109 states have (on average 1.1192660550458715) internal successors, (122), 110 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:46,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2021-10-21 19:28:46,597 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 59 [2021-10-21 19:28:46,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:46,597 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2021-10-21 19:28:46,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 9 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) [2021-10-21 19:28:46,598 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2021-10-21 19:28:46,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-21 19:28:46,599 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:46,599 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:46,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:46,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-21 19:28:46,814 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:46,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:46,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1856062402, now seen corresponding path program 5 times [2021-10-21 19:28:46,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:46,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230527536] [2021-10-21 19:28:46,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:46,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:46,823 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:46,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170298157] [2021-10-21 19:28:46,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:28:46,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:46,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:46,828 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:46,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-21 19:28:48,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-21 19:28:48,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:48,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:28:48,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:48,293 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:48,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:48,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230527536] [2021-10-21 19:28:48,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:48,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170298157] [2021-10-21 19:28:48,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170298157] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:48,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:48,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-21 19:28:48,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586544384] [2021-10-21 19:28:48,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:28:48,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:48,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:28:48,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:28:48,295 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 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) [2021-10-21 19:28:48,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:48,366 INFO L93 Difference]: Finished difference Result 142 states and 157 transitions. [2021-10-21 19:28:48,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:28:48,367 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 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) Word has length 60 [2021-10-21 19:28:48,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:48,368 INFO L225 Difference]: With dead ends: 142 [2021-10-21 19:28:48,368 INFO L226 Difference]: Without dead ends: 132 [2021-10-21 19:28:48,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:28:48,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-21 19:28:48,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-10-21 19:28:48,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 129 states have (on average 1.124031007751938) internal successors, (145), 130 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:48,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2021-10-21 19:28:48,389 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 60 [2021-10-21 19:28:48,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:48,389 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2021-10-21 19:28:48,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 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) [2021-10-21 19:28:48,390 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2021-10-21 19:28:48,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-21 19:28:48,390 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:48,391 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:48,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:48,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-21 19:28:48,598 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:48,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:48,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1836406497, now seen corresponding path program 6 times [2021-10-21 19:28:48,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:48,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947488351] [2021-10-21 19:28:48,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:48,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:48,607 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:48,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [631818882] [2021-10-21 19:28:48,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:28:48,607 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:48,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:48,615 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:48,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-21 19:28:49,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-10-21 19:28:49,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:49,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:28:49,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:49,290 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:49,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:49,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947488351] [2021-10-21 19:28:49,290 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:49,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631818882] [2021-10-21 19:28:49,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631818882] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:49,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:49,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-21 19:28:49,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209125624] [2021-10-21 19:28:49,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:28:49,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:49,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:28:49,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:28:49,293 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 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) [2021-10-21 19:28:49,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:49,392 INFO L93 Difference]: Finished difference Result 141 states and 155 transitions. [2021-10-21 19:28:49,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 19:28:49,393 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 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 [2021-10-21 19:28:49,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:49,394 INFO L225 Difference]: With dead ends: 141 [2021-10-21 19:28:49,394 INFO L226 Difference]: Without dead ends: 133 [2021-10-21 19:28:49,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:28:49,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-21 19:28:49,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-10-21 19:28:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 131 states have (on average 1.1221374045801527) internal successors, (147), 132 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:49,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 147 transitions. [2021-10-21 19:28:49,407 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 147 transitions. Word has length 67 [2021-10-21 19:28:49,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:49,408 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 147 transitions. [2021-10-21 19:28:49,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 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) [2021-10-21 19:28:49,408 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 147 transitions. [2021-10-21 19:28:49,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-21 19:28:49,409 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:49,409 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:49,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:49,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-21 19:28:49,630 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:49,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:49,631 INFO L82 PathProgramCache]: Analyzing trace with hash 843932311, now seen corresponding path program 6 times [2021-10-21 19:28:49,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:49,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253709716] [2021-10-21 19:28:49,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:49,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:49,640 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:49,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405027050] [2021-10-21 19:28:49,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:28:49,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:49,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:49,642 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:49,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-21 19:28:50,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-21 19:28:50,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:50,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:28:50,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:50,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:50,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253709716] [2021-10-21 19:28:50,387 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:50,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405027050] [2021-10-21 19:28:50,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405027050] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:50,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:50,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-21 19:28:50,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203236710] [2021-10-21 19:28:50,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:28:50,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:50,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:28:50,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:28:50,389 INFO L87 Difference]: Start difference. First operand 133 states and 147 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 11 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) [2021-10-21 19:28:50,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:50,492 INFO L93 Difference]: Finished difference Result 164 states and 182 transitions. [2021-10-21 19:28:50,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:28:50,492 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 11 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 [2021-10-21 19:28:50,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:50,494 INFO L225 Difference]: With dead ends: 164 [2021-10-21 19:28:50,494 INFO L226 Difference]: Without dead ends: 154 [2021-10-21 19:28:50,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:28:50,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-21 19:28:50,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2021-10-21 19:28:50,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 151 states have (on average 1.1258278145695364) internal successors, (170), 152 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:50,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 170 transitions. [2021-10-21 19:28:50,509 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 170 transitions. Word has length 67 [2021-10-21 19:28:50,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:50,509 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 170 transitions. [2021-10-21 19:28:50,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 11 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) [2021-10-21 19:28:50,510 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 170 transitions. [2021-10-21 19:28:50,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-10-21 19:28:50,510 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:50,511 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:50,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-10-21 19:28:50,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:50,718 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:50,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:50,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1778423326, now seen corresponding path program 7 times [2021-10-21 19:28:50,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:50,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017405984] [2021-10-21 19:28:50,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:50,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:50,729 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:50,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1000121351] [2021-10-21 19:28:50,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:28:50,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:50,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:50,731 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:50,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-21 19:28:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:51,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 19:28:51,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:51,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:51,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017405984] [2021-10-21 19:28:51,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:51,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000121351] [2021-10-21 19:28:51,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000121351] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:51,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:51,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-21 19:28:51,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926467853] [2021-10-21 19:28:51,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:28:51,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:51,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:28:51,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:28:51,487 INFO L87 Difference]: Start difference. First operand 153 states and 170 transitions. Second operand has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 12 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) [2021-10-21 19:28:51,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:51,593 INFO L93 Difference]: Finished difference Result 188 states and 210 transitions. [2021-10-21 19:28:51,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 19:28:51,594 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 12 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-10-21 19:28:51,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:51,595 INFO L225 Difference]: With dead ends: 188 [2021-10-21 19:28:51,596 INFO L226 Difference]: Without dead ends: 176 [2021-10-21 19:28:51,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 94.3ms TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:28:51,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-10-21 19:28:51,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2021-10-21 19:28:51,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 173 states have (on average 1.1271676300578035) internal successors, (195), 174 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:51,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 195 transitions. [2021-10-21 19:28:51,614 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 195 transitions. Word has length 74 [2021-10-21 19:28:51,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:51,615 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 195 transitions. [2021-10-21 19:28:51,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 12 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) [2021-10-21 19:28:51,615 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 195 transitions. [2021-10-21 19:28:51,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-10-21 19:28:51,617 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:51,618 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:51,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:51,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-21 19:28:51,832 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:51,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:51,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1453108407, now seen corresponding path program 8 times [2021-10-21 19:28:51,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:51,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196615913] [2021-10-21 19:28:51,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:51,832 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:51,848 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:51,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277172663] [2021-10-21 19:28:51,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:28:51,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:51,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:51,850 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:51,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-21 19:28:52,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:28:52,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:52,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-21 19:28:52,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:53,053 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 65 proven. 87 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-21 19:28:53,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:53,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196615913] [2021-10-21 19:28:53,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:53,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277172663] [2021-10-21 19:28:53,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277172663] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:53,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:53,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-21 19:28:53,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575592803] [2021-10-21 19:28:53,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:28:53,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:53,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:28:53,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:28:53,058 INFO L87 Difference]: Start difference. First operand 175 states and 195 transitions. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 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) [2021-10-21 19:28:53,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:53,255 INFO L93 Difference]: Finished difference Result 252 states and 282 transitions. [2021-10-21 19:28:53,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:28:53,256 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-10-21 19:28:53,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:53,257 INFO L225 Difference]: With dead ends: 252 [2021-10-21 19:28:53,257 INFO L226 Difference]: Without dead ends: 161 [2021-10-21 19:28:53,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 147.4ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:28:53,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-10-21 19:28:53,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-10-21 19:28:53,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 159 states have (on average 1.119496855345912) internal successors, (178), 160 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:53,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 178 transitions. [2021-10-21 19:28:53,307 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 178 transitions. Word has length 81 [2021-10-21 19:28:53,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:53,308 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 178 transitions. [2021-10-21 19:28:53,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 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) [2021-10-21 19:28:53,308 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 178 transitions. [2021-10-21 19:28:53,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-21 19:28:53,309 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:53,309 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:53,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:53,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:53,510 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:53,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:53,510 INFO L82 PathProgramCache]: Analyzing trace with hash -861698128, now seen corresponding path program 9 times [2021-10-21 19:28:53,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:53,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809341559] [2021-10-21 19:28:53,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:53,511 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:53,526 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:53,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2126405916] [2021-10-21 19:28:53,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:28:53,527 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:53,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:53,528 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:53,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-21 19:28:54,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-21 19:28:54,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:54,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:28:54,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 14 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:54,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:54,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809341559] [2021-10-21 19:28:54,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:54,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126405916] [2021-10-21 19:28:54,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126405916] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:54,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:54,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 19:28:54,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262983304] [2021-10-21 19:28:54,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:28:54,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:54,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:28:54,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:28:54,398 INFO L87 Difference]: Start difference. First operand 161 states and 178 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 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) [2021-10-21 19:28:54,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:54,511 INFO L93 Difference]: Finished difference Result 232 states and 257 transitions. [2021-10-21 19:28:54,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:28:54,512 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 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) Word has length 82 [2021-10-21 19:28:54,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:54,513 INFO L225 Difference]: With dead ends: 232 [2021-10-21 19:28:54,513 INFO L226 Difference]: Without dead ends: 147 [2021-10-21 19:28:54,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:28:54,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-21 19:28:54,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-10-21 19:28:54,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 145 states have (on average 1.110344827586207) internal successors, (161), 146 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:54,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 161 transitions. [2021-10-21 19:28:54,530 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 161 transitions. Word has length 82 [2021-10-21 19:28:54,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:54,530 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 161 transitions. [2021-10-21 19:28:54,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 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) [2021-10-21 19:28:54,530 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 161 transitions. [2021-10-21 19:28:54,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-10-21 19:28:54,531 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:54,532 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:54,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:54,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-21 19:28:54,752 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:54,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:54,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1395374203, now seen corresponding path program 7 times [2021-10-21 19:28:54,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:54,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398520427] [2021-10-21 19:28:54,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:54,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:54,775 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:54,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073085158] [2021-10-21 19:28:54,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:28:54,783 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:54,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:54,786 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:54,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-21 19:28:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:55,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 19:28:55,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:55,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:55,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398520427] [2021-10-21 19:28:55,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:55,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073085158] [2021-10-21 19:28:55,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073085158] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:55,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:55,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-21 19:28:55,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277593157] [2021-10-21 19:28:55,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:28:55,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:55,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:28:55,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:28:55,700 INFO L87 Difference]: Start difference. First operand 147 states and 161 transitions. Second operand has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 12 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) [2021-10-21 19:28:55,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:55,831 INFO L93 Difference]: Finished difference Result 157 states and 171 transitions. [2021-10-21 19:28:55,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-21 19:28:55,832 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 12 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 [2021-10-21 19:28:55,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:55,833 INFO L225 Difference]: With dead ends: 157 [2021-10-21 19:28:55,833 INFO L226 Difference]: Without dead ends: 149 [2021-10-21 19:28:55,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:28:55,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-10-21 19:28:55,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-10-21 19:28:55,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 147 states have (on average 1.1088435374149659) internal successors, (163), 148 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:55,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 163 transitions. [2021-10-21 19:28:55,852 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 163 transitions. Word has length 83 [2021-10-21 19:28:55,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:55,852 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 163 transitions. [2021-10-21 19:28:55,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 12 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) [2021-10-21 19:28:55,853 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 163 transitions. [2021-10-21 19:28:55,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-10-21 19:28:55,854 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:55,854 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:55,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:56,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:56,082 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 19:28:56,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:56,083 INFO L82 PathProgramCache]: Analyzing trace with hash -219254285, now seen corresponding path program 10 times [2021-10-21 19:28:56,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:56,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139971004] [2021-10-21 19:28:56,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:56,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:56,103 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:56,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216971684] [2021-10-21 19:28:56,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:28:56,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:56,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:56,107 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:56,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-21 19:28:56,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:28:56,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-21 19:28:56,735 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:28:56,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:56,866 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:28:56,866 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:28:56,867 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:28:56,869 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:28:56,869 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:28:56,869 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:28:56,870 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:28:56,870 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:28:56,870 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:28:56,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:57,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-21 19:28:57,104 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:28:57,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:28:57 BoogieIcfgContainer [2021-10-21 19:28:57,198 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:28:57,199 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:28:57,199 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:28:57,199 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:28:57,199 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:28:27" (3/4) ... [2021-10-21 19:28:57,201 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 19:28:57,268 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:28:57,268 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:28:57,270 INFO L168 Benchmark]: Toolchain (without parser) took 30488.98 ms. Allocated memory was 92.3 MB in the beginning and 167.8 MB in the end (delta: 75.5 MB). Free memory was 57.7 MB in the beginning and 89.6 MB in the end (delta: -31.9 MB). Peak memory consumption was 43.8 MB. Max. memory is 16.1 GB. [2021-10-21 19:28:57,270 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 92.3 MB. Free memory was 64.2 MB in the beginning and 64.1 MB in the end (delta: 29.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:28:57,271 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.10 ms. Allocated memory is still 92.3 MB. Free memory was 57.5 MB in the beginning and 68.6 MB in the end (delta: -11.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:28:57,271 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.48 ms. Allocated memory is still 92.3 MB. Free memory was 68.6 MB in the beginning and 66.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:28:57,272 INFO L168 Benchmark]: Boogie Preprocessor took 34.87 ms. Allocated memory is still 92.3 MB. Free memory was 66.9 MB in the beginning and 65.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:28:57,272 INFO L168 Benchmark]: RCFGBuilder took 437.56 ms. Allocated memory is still 92.3 MB. Free memory was 65.5 MB in the beginning and 55.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:28:57,272 INFO L168 Benchmark]: TraceAbstraction took 29558.88 ms. Allocated memory was 92.3 MB in the beginning and 167.8 MB in the end (delta: 75.5 MB). Free memory was 54.4 MB in the beginning and 95.9 MB in the end (delta: -41.5 MB). Peak memory consumption was 36.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:28:57,273 INFO L168 Benchmark]: Witness Printer took 69.71 ms. Allocated memory is still 167.8 MB. Free memory was 95.9 MB in the beginning and 89.6 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:28:57,275 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 92.3 MB. Free memory was 64.2 MB in the beginning and 64.1 MB in the end (delta: 29.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 331.10 ms. Allocated memory is still 92.3 MB. Free memory was 57.5 MB in the beginning and 68.6 MB in the end (delta: -11.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.48 ms. Allocated memory is still 92.3 MB. Free memory was 68.6 MB in the beginning and 66.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.87 ms. Allocated memory is still 92.3 MB. Free memory was 66.9 MB in the beginning and 65.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 437.56 ms. Allocated memory is still 92.3 MB. Free memory was 65.5 MB in the beginning and 55.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 29558.88 ms. Allocated memory was 92.3 MB in the beginning and 167.8 MB in the end (delta: 75.5 MB). Free memory was 54.4 MB in the beginning and 95.9 MB in the end (delta: -41.5 MB). Peak memory consumption was 36.2 MB. Max. memory is 16.1 GB. * Witness Printer took 69.71 ms. Allocated memory is still 167.8 MB. Free memory was 95.9 MB in the beginning and 89.6 MB in the end (delta: 6.3 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] int A, B; [L25] int r, d, p, q; [L26] A = __VERIFIER_nondet_int() [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<10 [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [counter=1] [L34] EXPR counter++ VAL [counter=2] [L34] COND TRUE counter++<10 [L15] COND FALSE !(!(cond)) VAL [counter=2] [L15] COND FALSE !(!(cond)) VAL [counter=2] [L15] COND FALSE !(!(cond)) VAL [counter=2] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [counter=2] [L34] EXPR counter++ VAL [counter=3] [L34] COND TRUE counter++<10 [L15] COND FALSE !(!(cond)) VAL [counter=3] [L15] COND FALSE !(!(cond)) VAL [counter=3] [L15] COND FALSE !(!(cond)) VAL [counter=3] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [counter=3] [L34] EXPR counter++ VAL [counter=4] [L34] COND TRUE counter++<10 [L15] COND FALSE !(!(cond)) VAL [counter=4] [L15] COND FALSE !(!(cond)) VAL [counter=4] [L15] COND FALSE !(!(cond)) VAL [counter=4] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [counter=4] [L34] EXPR counter++ VAL [counter=5] [L34] COND TRUE counter++<10 [L15] COND FALSE !(!(cond)) VAL [counter=5] [L15] COND FALSE !(!(cond)) VAL [counter=5] [L15] COND FALSE !(!(cond)) VAL [counter=5] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [counter=5] [L34] EXPR counter++ VAL [counter=6] [L34] COND TRUE counter++<10 [L15] COND FALSE !(!(cond)) VAL [counter=6] [L15] COND FALSE !(!(cond)) VAL [counter=6] [L15] COND FALSE !(!(cond)) VAL [counter=6] [L38] COND TRUE !(r >= d) VAL [counter=6] [L44] EXPR counter++ VAL [counter=7] [L44] COND TRUE counter++<10 [L15] COND FALSE !(!(cond)) VAL [counter=7] [L15] COND FALSE !(!(cond)) VAL [counter=7] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [counter=7] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [counter=7] [L44] EXPR counter++ VAL [counter=8] [L44] COND TRUE counter++<10 [L15] COND FALSE !(!(cond)) VAL [counter=8] [L15] COND FALSE !(!(cond)) VAL [counter=8] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [counter=8] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [counter=8] [L44] EXPR counter++ VAL [counter=9] [L44] COND TRUE counter++<10 [L15] COND FALSE !(!(cond)) VAL [counter=9] [L15] COND FALSE !(!(cond)) VAL [counter=9] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [counter=9] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [counter=9] [L44] EXPR counter++ VAL [counter=10] [L44] COND TRUE counter++<10 [L15] COND FALSE !(!(cond)) VAL [counter=10] [L15] COND FALSE !(!(cond)) VAL [counter=10] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [counter=10] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [counter=10] [L44] EXPR counter++ VAL [counter=11] [L44] COND FALSE !(counter++<10) [L15] COND TRUE !(cond) VAL [counter=11] [L17] reach_error() VAL [counter=11] - UnprovableResult [Line: 17]: 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: 17]: 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: 17]: 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: 17]: 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: 17]: 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: 17]: 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, 39 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 29379.2ms, OverallIterations: 33, TraceHistogramMax: 10, EmptinessCheckTime: 42.0ms, AutomataDifference: 3223.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 934 SDtfs, 1332 SDslu, 3265 SDs, 0 SdLazy, 1700 SolverSat, 363 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1270.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1333 GetRequests, 1061 SyntacticMatches, 1 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1801.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=175occurred in iteration=29, InterpolantAutomatonStates: 306, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 441.1ms AutomataMinimizationTime, 32 MinimizatonAttempts, 178 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 256.2ms SsaConstructionTime, 1826.3ms SatisfiabilityAnalysisTime, 7920.7ms InterpolantComputationTime, 1364 NumberOfCodeBlocks, 1287 NumberOfCodeBlocksAsserted, 74 NumberOfCheckSat, 1249 ConstructedInterpolants, 0 QuantifiedInterpolants, 5587 SizeOfPredicates, 151 NumberOfNonLiveVariables, 4870 ConjunctsInSsa, 456 ConjunctsInUnsatCore, 32 InterpolantComputations, 6 PerfectInterpolantSequences, 220/1792 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! [2021-10-21 19:28:57,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff6d33ee-85af-4226-91cc-acff977b854c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...