./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 99e5cccea54789cc7c8b01ece41ae38ca7afc8c38f73e2884988b8ff4c6bfc25 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:57:02,924 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:57:02,926 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:57:02,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:57:02,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:57:02,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:57:02,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:57:02,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:57:02,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:57:02,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:57:02,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:57:02,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:57:02,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:57:02,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:57:03,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:57:03,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:57:03,006 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:57:03,007 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:57:03,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:57:03,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:57:03,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:57:03,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:57:03,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:57:03,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:57:03,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:57:03,044 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:57:03,045 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:57:03,047 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:57:03,048 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:57:03,049 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:57:03,050 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:57:03,051 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:57:03,053 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:57:03,054 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:57:03,056 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:57:03,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:57:03,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:57:03,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:57:03,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:57:03,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:57:03,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:57:03,060 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 23:57:03,104 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:57:03,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:57:03,105 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:57:03,105 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:57:03,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:57:03,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:57:03,107 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:57:03,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:57:03,108 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:57:03,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:57:03,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:57:03,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:57:03,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 23:57:03,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:57:03,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 23:57:03,110 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:57:03,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:57:03,111 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:57:03,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 23:57:03,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:57:03,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:57:03,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:57:03,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:57:03,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:57:03,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:57:03,112 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 23:57:03,113 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:57:03,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:57:03,113 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 23:57:03,115 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 23:57:03,115 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 23:57:03,115 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:57:03,116 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_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99e5cccea54789cc7c8b01ece41ae38ca7afc8c38f73e2884988b8ff4c6bfc25 [2021-10-28 23:57:03,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:57:03,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:57:03,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:57:03,421 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:57:03,422 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:57:03,423 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c [2021-10-28 23:57:03,491 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/data/1fdb8e6bc/7974d3a19958479498d81a8a2b7f39bf/FLAG0b6b7739a [2021-10-28 23:57:03,923 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:57:03,924 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c [2021-10-28 23:57:03,933 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/data/1fdb8e6bc/7974d3a19958479498d81a8a2b7f39bf/FLAG0b6b7739a [2021-10-28 23:57:04,312 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/data/1fdb8e6bc/7974d3a19958479498d81a8a2b7f39bf [2021-10-28 23:57:04,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:57:04,316 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:57:04,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:57:04,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:57:04,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:57:04,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:57:04" (1/1) ... [2021-10-28 23:57:04,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b8383f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:57:04, skipping insertion in model container [2021-10-28 23:57:04,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:57:04" (1/1) ... [2021-10-28 23:57:04,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:57:04,364 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:57:04,524 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_74eb38a5-ec0d-4e70-a656-485377aa6a54/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c[458,471] [2021-10-28 23:57:04,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:57:04,570 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:57:04,580 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_74eb38a5-ec0d-4e70-a656-485377aa6a54/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c[458,471] [2021-10-28 23:57:04,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:57:04,600 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:57:04,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:57:04 WrapperNode [2021-10-28 23:57:04,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:57:04,602 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:57:04,602 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:57:04,602 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:57:04,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:57:04" (1/1) ... [2021-10-28 23:57:04,617 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:57:04" (1/1) ... [2021-10-28 23:57:04,637 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:57:04,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:57:04,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:57:04,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:57:04,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:57:04" (1/1) ... [2021-10-28 23:57:04,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:57:04" (1/1) ... [2021-10-28 23:57:04,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:57:04" (1/1) ... [2021-10-28 23:57:04,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:57:04" (1/1) ... [2021-10-28 23:57:04,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:57:04" (1/1) ... [2021-10-28 23:57:04,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:57:04" (1/1) ... [2021-10-28 23:57:04,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:57:04" (1/1) ... [2021-10-28 23:57:04,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:57:04,660 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:57:04,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:57:04,661 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:57:04,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:57:04" (1/1) ... [2021-10-28 23:57:04,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:57:04,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:04,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:57:04,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:57:04,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:57:04,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:57:04,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:57:04,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:57:04,968 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:57:04,968 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-28 23:57:04,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:57:04 BoogieIcfgContainer [2021-10-28 23:57:04,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:57:04,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:57:04,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:57:04,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:57:04,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:57:04" (1/3) ... [2021-10-28 23:57:04,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@558f61b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:57:04, skipping insertion in model container [2021-10-28 23:57:04,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:57:04" (2/3) ... [2021-10-28 23:57:04,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@558f61b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:57:04, skipping insertion in model container [2021-10-28 23:57:04,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:57:04" (3/3) ... [2021-10-28 23:57:04,979 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound20.c [2021-10-28 23:57:04,984 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:57:04,984 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-28 23:57:05,031 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:57:05,037 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 23:57:05,038 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-28 23:57:05,052 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 16 states have (on average 1.5625) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:05,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-28 23:57:05,056 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:05,057 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-28 23:57:05,058 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:05,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:05,063 INFO L85 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-10-28 23:57:05,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:05,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236579204] [2021-10-28 23:57:05,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:05,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:05,183 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:05,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348277805] [2021-10-28 23:57:05,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:05,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:05,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:05,199 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:05,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:57:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:05,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:57:05,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:05,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:05,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236579204] [2021-10-28 23:57:05,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:05,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348277805] [2021-10-28 23:57:05,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348277805] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:57:05,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:57:05,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:57:05,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250071536] [2021-10-28 23:57:05,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:57:05,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:05,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:57:05,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:57:05,486 INFO L87 Difference]: Start difference. First operand has 20 states, 16 states have (on average 1.5625) internal successors, (25), 19 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) 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) [2021-10-28 23:57:05,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:05,553 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2021-10-28 23:57:05,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:57:05,555 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 [2021-10-28 23:57:05,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:05,563 INFO L225 Difference]: With dead ends: 54 [2021-10-28 23:57:05,563 INFO L226 Difference]: Without dead ends: 23 [2021-10-28 23:57:05,566 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:57:05,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-28 23:57:05,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-10-28 23:57:05,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:05,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-10-28 23:57:05,597 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 6 [2021-10-28 23:57:05,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:05,597 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-10-28 23:57:05,598 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) [2021-10-28 23:57:05,598 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-10-28 23:57:05,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 23:57:05,598 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:05,599 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:05,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:05,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-28 23:57:05,816 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:05,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:05,817 INFO L85 PathProgramCache]: Analyzing trace with hash 855725686, now seen corresponding path program 1 times [2021-10-28 23:57:05,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:05,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559979082] [2021-10-28 23:57:05,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:05,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:05,835 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:05,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970190248] [2021-10-28 23:57:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:05,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:05,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:05,837 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:05,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:57:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:05,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:57:05,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:06,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:06,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559979082] [2021-10-28 23:57:06,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:06,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970190248] [2021-10-28 23:57:06,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970190248] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:06,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:06,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-28 23:57:06,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765034151] [2021-10-28 23:57:06,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:57:06,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:06,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:57:06,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:57:06,078 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:06,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:06,191 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-10-28 23:57:06,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:57:06,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-28 23:57:06,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:06,194 INFO L225 Difference]: With dead ends: 37 [2021-10-28 23:57:06,194 INFO L226 Difference]: Without dead ends: 31 [2021-10-28 23:57:06,195 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:57:06,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-28 23:57:06,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-10-28 23:57:06,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:06,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-10-28 23:57:06,217 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 10 [2021-10-28 23:57:06,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:06,217 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-10-28 23:57:06,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:06,218 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-10-28 23:57:06,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 23:57:06,219 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:06,219 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:06,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:06,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:06,420 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:06,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:06,421 INFO L85 PathProgramCache]: Analyzing trace with hash 757648847, now seen corresponding path program 1 times [2021-10-28 23:57:06,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:06,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986788507] [2021-10-28 23:57:06,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:06,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:06,434 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:06,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644840741] [2021-10-28 23:57:06,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:06,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:06,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:06,436 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:06,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:57:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:06,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 23:57:06,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:06,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:06,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986788507] [2021-10-28 23:57:06,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:06,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644840741] [2021-10-28 23:57:06,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644840741] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:06,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:06,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-28 23:57:06,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776559806] [2021-10-28 23:57:06,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:57:06,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:06,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:57:06,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:57:06,579 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:06,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:06,615 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-10-28 23:57:06,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:57:06,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-28 23:57:06,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:06,618 INFO L225 Difference]: With dead ends: 30 [2021-10-28 23:57:06,625 INFO L226 Difference]: Without dead ends: 26 [2021-10-28 23:57:06,626 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:57:06,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-28 23:57:06,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-28 23:57:06,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:06,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-10-28 23:57:06,631 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 11 [2021-10-28 23:57:06,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:06,631 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-10-28 23:57:06,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:06,632 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-10-28 23:57:06,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:57:06,633 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:06,633 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:06,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:06,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-28 23:57:06,843 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:06,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:06,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1997070616, now seen corresponding path program 1 times [2021-10-28 23:57:06,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:06,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522726707] [2021-10-28 23:57:06,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:06,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:06,857 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:06,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [339049570] [2021-10-28 23:57:06,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:06,858 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:06,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:06,859 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:06,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:57:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:06,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 23:57:06,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:07,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:07,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:07,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522726707] [2021-10-28 23:57:07,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:07,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339049570] [2021-10-28 23:57:07,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339049570] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:07,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:07,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 23:57:07,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422012309] [2021-10-28 23:57:07,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:57:07,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:07,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:57:07,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:57:07,124 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:07,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:07,178 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-10-28 23:57:07,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:57:07,179 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-28 23:57:07,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:07,180 INFO L225 Difference]: With dead ends: 28 [2021-10-28 23:57:07,180 INFO L226 Difference]: Without dead ends: 24 [2021-10-28 23:57:07,180 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:57:07,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-28 23:57:07,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-28 23:57:07,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:07,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-10-28 23:57:07,185 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 13 [2021-10-28 23:57:07,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:07,185 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-10-28 23:57:07,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:07,186 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-10-28 23:57:07,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 23:57:07,186 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:07,187 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2021-10-28 23:57:07,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:07,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:07,411 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:07,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:07,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1778536670, now seen corresponding path program 2 times [2021-10-28 23:57:07,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:07,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836874205] [2021-10-28 23:57:07,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:07,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:07,427 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:07,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964533573] [2021-10-28 23:57:07,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:57:07,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:07,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:07,447 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:07,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 23:57:07,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:57:07,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:07,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 23:57:07,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:07,773 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:07,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:07,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836874205] [2021-10-28 23:57:07,774 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:07,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964533573] [2021-10-28 23:57:07,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964533573] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:07,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:07,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 23:57:07,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912512087] [2021-10-28 23:57:07,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:57:07,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:07,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:57:07,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:57:07,777 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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) [2021-10-28 23:57:07,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:07,851 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-10-28 23:57:07,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:57:07,851 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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 [2021-10-28 23:57:07,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:07,852 INFO L225 Difference]: With dead ends: 41 [2021-10-28 23:57:07,852 INFO L226 Difference]: Without dead ends: 35 [2021-10-28 23:57:07,853 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:57:07,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-28 23:57:07,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2021-10-28 23:57:07,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:07,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-10-28 23:57:07,858 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 14 [2021-10-28 23:57:07,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:07,859 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-10-28 23:57:07,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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) [2021-10-28 23:57:07,859 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-10-28 23:57:07,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 23:57:07,860 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:07,860 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:07,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:08,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:08,065 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:08,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:08,065 INFO L85 PathProgramCache]: Analyzing trace with hash 699894435, now seen corresponding path program 2 times [2021-10-28 23:57:08,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:08,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924943796] [2021-10-28 23:57:08,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:08,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:08,073 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:08,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1321946058] [2021-10-28 23:57:08,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:57:08,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:08,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:08,076 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:08,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 23:57:08,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:57:08,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:08,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:57:08,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:08,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:08,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924943796] [2021-10-28 23:57:08,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:08,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321946058] [2021-10-28 23:57:08,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321946058] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:08,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:08,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-28 23:57:08,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607388156] [2021-10-28 23:57:08,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:57:08,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:08,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:57:08,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:57:08,236 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:08,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:08,320 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-10-28 23:57:08,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:57:08,321 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-10-28 23:57:08,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:08,322 INFO L225 Difference]: With dead ends: 34 [2021-10-28 23:57:08,322 INFO L226 Difference]: Without dead ends: 30 [2021-10-28 23:57:08,323 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:57:08,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-28 23:57:08,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-28 23:57:08,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:08,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-10-28 23:57:08,327 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 15 [2021-10-28 23:57:08,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:08,328 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-10-28 23:57:08,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:08,328 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-10-28 23:57:08,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 23:57:08,329 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:08,329 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:08,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:08,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-28 23:57:08,547 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:08,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:08,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1664485700, now seen corresponding path program 2 times [2021-10-28 23:57:08,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:08,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153107081] [2021-10-28 23:57:08,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:08,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:08,560 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:08,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702900639] [2021-10-28 23:57:08,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:57:08,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:08,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:08,562 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:08,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 23:57:08,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:57:08,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:08,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 23:57:08,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:08,910 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:08,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:08,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153107081] [2021-10-28 23:57:08,914 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:08,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702900639] [2021-10-28 23:57:08,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702900639] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:08,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:08,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 23:57:08,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328962647] [2021-10-28 23:57:08,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:57:08,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:08,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:57:08,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:57:08,920 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:08,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:08,995 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-10-28 23:57:08,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:57:08,996 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-28 23:57:08,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:08,998 INFO L225 Difference]: With dead ends: 32 [2021-10-28 23:57:09,001 INFO L226 Difference]: Without dead ends: 28 [2021-10-28 23:57:09,001 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:57:09,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-28 23:57:09,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-28 23:57:09,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:09,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-28 23:57:09,011 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 17 [2021-10-28 23:57:09,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:09,012 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-28 23:57:09,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:09,012 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-28 23:57:09,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 23:57:09,014 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:09,014 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2021-10-28 23:57:09,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:09,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:09,243 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:09,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:09,243 INFO L85 PathProgramCache]: Analyzing trace with hash -58338866, now seen corresponding path program 3 times [2021-10-28 23:57:09,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:09,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125705530] [2021-10-28 23:57:09,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:09,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:09,255 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:09,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472923615] [2021-10-28 23:57:09,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:57:09,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:09,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:09,256 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:09,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 23:57:09,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 23:57:09,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:09,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 23:57:09,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 23:57:09,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:09,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125705530] [2021-10-28 23:57:09,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:09,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472923615] [2021-10-28 23:57:09,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472923615] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:09,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:09,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-28 23:57:09,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467754093] [2021-10-28 23:57:09,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:57:09,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:09,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:57:09,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:57:09,507 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:09,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:09,686 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-10-28 23:57:09,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:57:09,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-28 23:57:09,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:09,687 INFO L225 Difference]: With dead ends: 28 [2021-10-28 23:57:09,687 INFO L226 Difference]: Without dead ends: 22 [2021-10-28 23:57:09,688 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:57:09,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-28 23:57:09,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-28 23:57:09,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:09,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-10-28 23:57:09,692 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2021-10-28 23:57:09,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:09,693 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-10-28 23:57:09,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:09,693 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-10-28 23:57:09,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 23:57:09,693 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:09,694 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:09,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:09,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:09,903 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:09,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:09,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1808548489, now seen corresponding path program 3 times [2021-10-28 23:57:09,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:09,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758053014] [2021-10-28 23:57:09,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:09,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:09,912 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:09,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465590557] [2021-10-28 23:57:09,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:57:09,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:09,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:09,920 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:09,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 23:57:10,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 23:57:10,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:10,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 23:57:10,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:10,117 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:10,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:10,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758053014] [2021-10-28 23:57:10,117 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:10,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465590557] [2021-10-28 23:57:10,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465590557] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:10,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:10,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 23:57:10,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832629073] [2021-10-28 23:57:10,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:57:10,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:10,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:57:10,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:57:10,120 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:10,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:10,170 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-10-28 23:57:10,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:57:10,171 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-28 23:57:10,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:10,173 INFO L225 Difference]: With dead ends: 28 [2021-10-28 23:57:10,173 INFO L226 Difference]: Without dead ends: 24 [2021-10-28 23:57:10,174 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:57:10,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-28 23:57:10,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-28 23:57:10,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:10,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-10-28 23:57:10,185 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2021-10-28 23:57:10,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:10,185 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-10-28 23:57:10,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:10,186 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-10-28 23:57:10,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 23:57:10,186 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:10,187 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:10,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:10,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-28 23:57:10,398 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:10,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:10,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1493484688, now seen corresponding path program 3 times [2021-10-28 23:57:10,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:10,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824204464] [2021-10-28 23:57:10,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:10,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:10,409 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:10,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350024771] [2021-10-28 23:57:10,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:57:10,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:10,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:10,415 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:10,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 23:57:10,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 23:57:10,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:10,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 23:57:10,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:10,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:10,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824204464] [2021-10-28 23:57:10,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:10,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350024771] [2021-10-28 23:57:10,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350024771] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:10,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:10,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 23:57:10,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124811716] [2021-10-28 23:57:10,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:57:10,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:10,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:57:10,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:57:10,837 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:10,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:10,922 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-10-28 23:57:10,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:57:10,923 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-28 23:57:10,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:10,924 INFO L225 Difference]: With dead ends: 30 [2021-10-28 23:57:10,924 INFO L226 Difference]: Without dead ends: 26 [2021-10-28 23:57:10,924 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:57:10,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-28 23:57:10,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-28 23:57:10,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:10,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-10-28 23:57:10,935 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2021-10-28 23:57:10,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:10,937 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-10-28 23:57:10,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:10,938 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-10-28 23:57:10,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 23:57:10,938 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:10,939 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:10,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:11,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 23:57:11,151 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:11,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:11,151 INFO L85 PathProgramCache]: Analyzing trace with hash 754083403, now seen corresponding path program 4 times [2021-10-28 23:57:11,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:11,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995849975] [2021-10-28 23:57:11,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:11,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:11,159 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:11,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033186834] [2021-10-28 23:57:11,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:57:11,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:11,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:11,162 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:11,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 23:57:11,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:57:11,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:11,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:57:11,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:11,376 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:11,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:11,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995849975] [2021-10-28 23:57:11,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:11,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033186834] [2021-10-28 23:57:11,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033186834] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:11,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:11,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 23:57:11,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634907186] [2021-10-28 23:57:11,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:57:11,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:11,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:57:11,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:57:11,379 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:11,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:11,428 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-10-28 23:57:11,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:57:11,429 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-28 23:57:11,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:11,430 INFO L225 Difference]: With dead ends: 32 [2021-10-28 23:57:11,430 INFO L226 Difference]: Without dead ends: 28 [2021-10-28 23:57:11,431 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:57:11,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-28 23:57:11,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-28 23:57:11,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:11,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-28 23:57:11,438 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2021-10-28 23:57:11,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:11,439 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-28 23:57:11,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:11,439 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-28 23:57:11,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-28 23:57:11,441 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:11,441 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:11,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:11,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:11,662 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:11,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:11,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1128495004, now seen corresponding path program 4 times [2021-10-28 23:57:11,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:11,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496667894] [2021-10-28 23:57:11,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:11,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:11,672 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:11,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812454487] [2021-10-28 23:57:11,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:57:11,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:11,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:11,682 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:11,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 23:57:11,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:57:11,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:11,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-28 23:57:11,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:12,203 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:12,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:12,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496667894] [2021-10-28 23:57:12,204 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:12,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812454487] [2021-10-28 23:57:12,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812454487] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:12,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:12,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-28 23:57:12,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019805084] [2021-10-28 23:57:12,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:57:12,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:12,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:57:12,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:57:12,206 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:12,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:12,322 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-10-28 23:57:12,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:57:12,323 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-28 23:57:12,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:12,323 INFO L225 Difference]: With dead ends: 34 [2021-10-28 23:57:12,323 INFO L226 Difference]: Without dead ends: 30 [2021-10-28 23:57:12,323 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:57:12,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-28 23:57:12,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-28 23:57:12,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:12,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-10-28 23:57:12,328 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2021-10-28 23:57:12,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:12,329 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-10-28 23:57:12,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:12,329 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-10-28 23:57:12,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 23:57:12,330 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:12,330 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:12,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:12,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 23:57:12,530 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:12,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:12,531 INFO L85 PathProgramCache]: Analyzing trace with hash -2117565153, now seen corresponding path program 5 times [2021-10-28 23:57:12,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:12,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268512273] [2021-10-28 23:57:12,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:12,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:12,539 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:12,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066302912] [2021-10-28 23:57:12,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:57:12,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:12,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:12,541 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:12,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 23:57:13,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-28 23:57:13,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:13,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 23:57:13,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:13,193 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:13,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:13,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268512273] [2021-10-28 23:57:13,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:13,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066302912] [2021-10-28 23:57:13,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066302912] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:13,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:13,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 23:57:13,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690523763] [2021-10-28 23:57:13,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:57:13,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:13,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:57:13,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:57:13,197 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:13,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:13,276 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-10-28 23:57:13,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 23:57:13,276 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-28 23:57:13,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:13,277 INFO L225 Difference]: With dead ends: 36 [2021-10-28 23:57:13,277 INFO L226 Difference]: Without dead ends: 32 [2021-10-28 23:57:13,277 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:57:13,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-28 23:57:13,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-28 23:57:13,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:13,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-10-28 23:57:13,283 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2021-10-28 23:57:13,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:13,283 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-10-28 23:57:13,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:13,283 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-10-28 23:57:13,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 23:57:13,284 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:13,284 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:13,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:13,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 23:57:13,491 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:13,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:13,491 INFO L85 PathProgramCache]: Analyzing trace with hash 881214008, now seen corresponding path program 5 times [2021-10-28 23:57:13,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:13,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567018475] [2021-10-28 23:57:13,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:13,491 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:13,516 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:13,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103124946] [2021-10-28 23:57:13,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:57:13,527 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:13,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:13,529 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:13,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 23:57:14,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-28 23:57:14,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:14,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 23:57:14,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:14,459 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:14,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:14,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567018475] [2021-10-28 23:57:14,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:14,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103124946] [2021-10-28 23:57:14,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103124946] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:14,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:14,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-28 23:57:14,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284164019] [2021-10-28 23:57:14,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:57:14,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:14,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:57:14,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:57:14,462 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:14,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:14,834 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-10-28 23:57:14,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:57:14,835 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-28 23:57:14,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:14,835 INFO L225 Difference]: With dead ends: 38 [2021-10-28 23:57:14,836 INFO L226 Difference]: Without dead ends: 34 [2021-10-28 23:57:14,836 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:57:14,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-28 23:57:14,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-10-28 23:57:14,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:14,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-10-28 23:57:14,844 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2021-10-28 23:57:14,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:14,844 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-10-28 23:57:14,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:14,844 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-10-28 23:57:14,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 23:57:14,845 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:14,845 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:14,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:15,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 23:57:15,052 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:15,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:15,052 INFO L85 PathProgramCache]: Analyzing trace with hash 772479475, now seen corresponding path program 6 times [2021-10-28 23:57:15,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:15,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253682146] [2021-10-28 23:57:15,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:15,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:15,063 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:15,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901945338] [2021-10-28 23:57:15,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:57:15,064 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:15,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:15,079 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:15,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 23:57:15,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-28 23:57:15,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:15,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 23:57:15,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:15,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:15,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253682146] [2021-10-28 23:57:15,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:15,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901945338] [2021-10-28 23:57:15,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901945338] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:15,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:15,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-28 23:57:15,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16806132] [2021-10-28 23:57:15,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:57:15,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:15,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:57:15,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:57:15,440 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:15,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:15,516 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-10-28 23:57:15,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 23:57:15,516 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-28 23:57:15,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:15,518 INFO L225 Difference]: With dead ends: 40 [2021-10-28 23:57:15,518 INFO L226 Difference]: Without dead ends: 36 [2021-10-28 23:57:15,521 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:57:15,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-28 23:57:15,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-28 23:57:15,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:15,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-10-28 23:57:15,533 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2021-10-28 23:57:15,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:15,534 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-10-28 23:57:15,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:15,534 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-10-28 23:57:15,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-28 23:57:15,537 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:15,537 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:15,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:15,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 23:57:15,743 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:15,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:15,743 INFO L85 PathProgramCache]: Analyzing trace with hash -629738996, now seen corresponding path program 6 times [2021-10-28 23:57:15,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:15,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243470946] [2021-10-28 23:57:15,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:15,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:15,751 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:15,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929667698] [2021-10-28 23:57:15,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:57:15,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:15,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:15,764 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:15,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 23:57:16,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-28 23:57:16,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:16,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-28 23:57:16,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:16,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:16,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243470946] [2021-10-28 23:57:16,653 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:16,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929667698] [2021-10-28 23:57:16,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929667698] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:16,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:16,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-28 23:57:16,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136781788] [2021-10-28 23:57:16,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 23:57:16,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:16,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 23:57:16,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:57:16,655 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:17,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:17,044 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-10-28 23:57:17,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:57:17,045 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-28 23:57:17,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:17,045 INFO L225 Difference]: With dead ends: 42 [2021-10-28 23:57:17,045 INFO L226 Difference]: Without dead ends: 38 [2021-10-28 23:57:17,045 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:57:17,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-28 23:57:17,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-28 23:57:17,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:17,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-10-28 23:57:17,051 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2021-10-28 23:57:17,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:17,051 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-10-28 23:57:17,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:17,051 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-10-28 23:57:17,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 23:57:17,052 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:17,052 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:17,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:17,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:17,258 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:17,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:17,259 INFO L85 PathProgramCache]: Analyzing trace with hash 445588679, now seen corresponding path program 7 times [2021-10-28 23:57:17,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:17,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552452386] [2021-10-28 23:57:17,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:17,260 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:17,268 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:17,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131737749] [2021-10-28 23:57:17,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:57:17,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:17,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:17,285 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:17,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 23:57:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:17,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 23:57:17,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:17,671 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:17,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:17,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552452386] [2021-10-28 23:57:17,672 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:17,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131737749] [2021-10-28 23:57:17,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131737749] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:17,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:17,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-28 23:57:17,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984612172] [2021-10-28 23:57:17,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 23:57:17,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:17,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 23:57:17,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:57:17,674 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:17,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:17,760 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-10-28 23:57:17,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 23:57:17,761 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-28 23:57:17,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:17,761 INFO L225 Difference]: With dead ends: 44 [2021-10-28 23:57:17,761 INFO L226 Difference]: Without dead ends: 40 [2021-10-28 23:57:17,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:57:17,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-28 23:57:17,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-10-28 23:57:17,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:17,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-10-28 23:57:17,768 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2021-10-28 23:57:17,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:17,768 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-10-28 23:57:17,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:17,768 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-10-28 23:57:17,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-28 23:57:17,769 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:17,769 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:17,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:17,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 23:57:17,990 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:17,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:17,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1239181344, now seen corresponding path program 7 times [2021-10-28 23:57:17,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:17,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210467126] [2021-10-28 23:57:17,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:17,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:17,997 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:17,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529611330] [2021-10-28 23:57:17,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:57:17,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:17,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:17,999 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:18,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 23:57:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:18,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-28 23:57:18,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:18,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:18,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210467126] [2021-10-28 23:57:18,900 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:18,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529611330] [2021-10-28 23:57:18,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529611330] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:18,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:18,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-28 23:57:18,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121614307] [2021-10-28 23:57:18,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:57:18,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:18,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:57:18,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:57:18,903 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:19,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:19,235 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-10-28 23:57:19,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:57:19,235 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-28 23:57:19,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:19,236 INFO L225 Difference]: With dead ends: 46 [2021-10-28 23:57:19,236 INFO L226 Difference]: Without dead ends: 42 [2021-10-28 23:57:19,236 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:57:19,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-28 23:57:19,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-28 23:57:19,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:19,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-10-28 23:57:19,245 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2021-10-28 23:57:19,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:19,245 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-10-28 23:57:19,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:19,246 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-10-28 23:57:19,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 23:57:19,246 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:19,246 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:19,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:19,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 23:57:19,452 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:19,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:19,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1112955493, now seen corresponding path program 8 times [2021-10-28 23:57:19,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:19,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320524305] [2021-10-28 23:57:19,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:19,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:19,460 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:19,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137446430] [2021-10-28 23:57:19,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:57:19,461 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:19,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:19,464 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:19,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 23:57:19,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:57:19,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:19,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 23:57:19,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:19,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:19,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320524305] [2021-10-28 23:57:19,853 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:19,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137446430] [2021-10-28 23:57:19,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137446430] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:19,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:19,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-28 23:57:19,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51523605] [2021-10-28 23:57:19,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:57:19,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:19,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:57:19,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:57:19,856 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:19,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:19,949 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-10-28 23:57:19,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 23:57:19,950 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-10-28 23:57:19,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:19,950 INFO L225 Difference]: With dead ends: 48 [2021-10-28 23:57:19,950 INFO L226 Difference]: Without dead ends: 44 [2021-10-28 23:57:19,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-10-28 23:57:19,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-28 23:57:19,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-10-28 23:57:19,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:19,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-10-28 23:57:19,957 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 39 [2021-10-28 23:57:19,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:19,957 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-10-28 23:57:19,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:19,958 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-10-28 23:57:19,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-28 23:57:19,958 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:19,959 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:19,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:20,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:20,171 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:20,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:20,172 INFO L85 PathProgramCache]: Analyzing trace with hash -56544332, now seen corresponding path program 8 times [2021-10-28 23:57:20,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:20,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979336841] [2021-10-28 23:57:20,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:20,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:20,179 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:20,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1477981355] [2021-10-28 23:57:20,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:57:20,180 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:20,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:20,181 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:20,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 23:57:21,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:57:21,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:21,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 23:57:21,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:21,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:21,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979336841] [2021-10-28 23:57:21,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:21,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477981355] [2021-10-28 23:57:21,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477981355] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:21,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:21,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-28 23:57:21,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468851845] [2021-10-28 23:57:21,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 23:57:21,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:21,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 23:57:21,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:57:21,412 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:21,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:21,637 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2021-10-28 23:57:21,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:57:21,638 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-28 23:57:21,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:21,638 INFO L225 Difference]: With dead ends: 50 [2021-10-28 23:57:21,638 INFO L226 Difference]: Without dead ends: 46 [2021-10-28 23:57:21,639 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:57:21,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-28 23:57:21,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-10-28 23:57:21,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:21,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-10-28 23:57:21,653 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2021-10-28 23:57:21,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:21,653 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-10-28 23:57:21,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:21,653 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-10-28 23:57:21,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-28 23:57:21,654 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:21,654 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:21,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:21,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:21,862 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:21,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:21,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1529846895, now seen corresponding path program 9 times [2021-10-28 23:57:21,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:21,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975615184] [2021-10-28 23:57:21,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:21,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:21,871 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:21,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452289319] [2021-10-28 23:57:21,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:57:21,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:21,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:21,874 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:21,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 23:57:22,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-28 23:57:22,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:22,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 23:57:22,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:22,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:22,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975615184] [2021-10-28 23:57:22,506 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:22,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452289319] [2021-10-28 23:57:22,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452289319] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:22,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:22,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-28 23:57:22,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716634603] [2021-10-28 23:57:22,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 23:57:22,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:22,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 23:57:22,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:57:22,508 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:22,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:22,623 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-10-28 23:57:22,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-28 23:57:22,624 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-10-28 23:57:22,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:22,624 INFO L225 Difference]: With dead ends: 52 [2021-10-28 23:57:22,624 INFO L226 Difference]: Without dead ends: 48 [2021-10-28 23:57:22,625 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-10-28 23:57:22,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-28 23:57:22,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-10-28 23:57:22,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:22,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-10-28 23:57:22,630 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 43 [2021-10-28 23:57:22,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:22,630 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-10-28 23:57:22,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:22,631 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-10-28 23:57:22,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 23:57:22,631 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:22,631 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:22,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:22,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-28 23:57:22,832 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:22,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:22,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1350878600, now seen corresponding path program 9 times [2021-10-28 23:57:22,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:22,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469108221] [2021-10-28 23:57:22,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:22,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:22,840 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:22,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469326651] [2021-10-28 23:57:22,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:57:22,841 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:22,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:22,841 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:22,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 23:57:23,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-28 23:57:23,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:23,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-28 23:57:23,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:24,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:24,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469108221] [2021-10-28 23:57:24,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:24,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469326651] [2021-10-28 23:57:24,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469326651] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:24,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:24,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-10-28 23:57:24,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002057272] [2021-10-28 23:57:24,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 23:57:24,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:24,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 23:57:24,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:57:24,127 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:24,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:24,437 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-10-28 23:57:24,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 23:57:24,440 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-10-28 23:57:24,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:24,440 INFO L225 Difference]: With dead ends: 57 [2021-10-28 23:57:24,440 INFO L226 Difference]: Without dead ends: 53 [2021-10-28 23:57:24,441 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:57:24,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-28 23:57:24,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2021-10-28 23:57:24,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:24,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-10-28 23:57:24,446 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2021-10-28 23:57:24,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:24,446 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-10-28 23:57:24,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:24,446 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-10-28 23:57:24,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 23:57:24,447 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:24,447 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:24,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:24,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-28 23:57:24,647 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:24,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:24,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1148586307, now seen corresponding path program 10 times [2021-10-28 23:57:24,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:24,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994059917] [2021-10-28 23:57:24,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:24,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:24,653 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:24,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763781153] [2021-10-28 23:57:24,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:57:24,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:24,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:24,657 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:24,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 23:57:24,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:57:24,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:24,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 23:57:24,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:25,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:25,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994059917] [2021-10-28 23:57:25,199 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:25,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763781153] [2021-10-28 23:57:25,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763781153] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:25,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:25,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-28 23:57:25,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698776626] [2021-10-28 23:57:25,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 23:57:25,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:25,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 23:57:25,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:57:25,202 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:25,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:25,315 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-10-28 23:57:25,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 23:57:25,315 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-10-28 23:57:25,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:25,316 INFO L225 Difference]: With dead ends: 56 [2021-10-28 23:57:25,316 INFO L226 Difference]: Without dead ends: 52 [2021-10-28 23:57:25,316 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-10-28 23:57:25,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-28 23:57:25,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-10-28 23:57:25,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:25,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-10-28 23:57:25,322 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2021-10-28 23:57:25,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:25,322 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-10-28 23:57:25,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:25,323 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-10-28 23:57:25,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-28 23:57:25,323 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:25,323 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:25,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-10-28 23:57:25,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:25,536 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:25,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:25,537 INFO L85 PathProgramCache]: Analyzing trace with hash 31673692, now seen corresponding path program 10 times [2021-10-28 23:57:25,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:25,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282477700] [2021-10-28 23:57:25,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:25,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:25,552 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:25,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [196389733] [2021-10-28 23:57:25,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:57:25,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:25,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:25,554 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:25,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 23:57:26,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:57:26,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:26,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-28 23:57:26,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:27,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:27,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282477700] [2021-10-28 23:57:27,441 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:27,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196389733] [2021-10-28 23:57:27,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196389733] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:27,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:27,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-10-28 23:57:27,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504454675] [2021-10-28 23:57:27,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 23:57:27,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:27,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 23:57:27,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:57:27,443 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:27,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:27,721 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-10-28 23:57:27,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 23:57:27,722 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-10-28 23:57:27,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:27,722 INFO L225 Difference]: With dead ends: 58 [2021-10-28 23:57:27,722 INFO L226 Difference]: Without dead ends: 54 [2021-10-28 23:57:27,723 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:57:27,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-28 23:57:27,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-28 23:57:27,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:27,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-10-28 23:57:27,728 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 49 [2021-10-28 23:57:27,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:27,729 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-10-28 23:57:27,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:27,729 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-10-28 23:57:27,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 23:57:27,729 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:27,730 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:27,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:27,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:27,930 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:27,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:27,931 INFO L85 PathProgramCache]: Analyzing trace with hash 408022039, now seen corresponding path program 11 times [2021-10-28 23:57:27,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:27,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435800680] [2021-10-28 23:57:27,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:27,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:27,938 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:27,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367768044] [2021-10-28 23:57:27,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:57:27,939 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:27,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:27,940 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:27,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-28 23:57:28,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-10-28 23:57:28,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:28,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-28 23:57:28,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:28,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:28,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435800680] [2021-10-28 23:57:28,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:28,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367768044] [2021-10-28 23:57:28,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367768044] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:28,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:28,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-10-28 23:57:28,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440782563] [2021-10-28 23:57:28,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 23:57:28,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:28,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 23:57:28,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:57:28,693 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:28,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:28,829 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2021-10-28 23:57:28,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 23:57:28,830 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-10-28 23:57:28,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:28,830 INFO L225 Difference]: With dead ends: 60 [2021-10-28 23:57:28,830 INFO L226 Difference]: Without dead ends: 56 [2021-10-28 23:57:28,831 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-10-28 23:57:28,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-28 23:57:28,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-10-28 23:57:28,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:28,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-10-28 23:57:28,837 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 51 [2021-10-28 23:57:28,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:28,837 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-10-28 23:57:28,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:28,838 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-10-28 23:57:28,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-28 23:57:28,838 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:28,839 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:28,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:29,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:29,046 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:29,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:29,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1313983280, now seen corresponding path program 11 times [2021-10-28 23:57:29,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:29,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899196070] [2021-10-28 23:57:29,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:29,047 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:29,054 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:29,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034632382] [2021-10-28 23:57:29,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:57:29,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:29,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:29,056 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:29,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-28 23:57:29,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-10-28 23:57:29,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:29,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-28 23:57:29,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:30,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:30,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899196070] [2021-10-28 23:57:30,129 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:30,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034632382] [2021-10-28 23:57:30,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034632382] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:30,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:30,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-10-28 23:57:30,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318916427] [2021-10-28 23:57:30,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 23:57:30,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:30,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 23:57:30,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:57:30,135 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:30,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:30,420 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2021-10-28 23:57:30,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 23:57:30,421 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-10-28 23:57:30,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:30,421 INFO L225 Difference]: With dead ends: 62 [2021-10-28 23:57:30,421 INFO L226 Difference]: Without dead ends: 58 [2021-10-28 23:57:30,422 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:57:30,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-28 23:57:30,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-10-28 23:57:30,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:30,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-10-28 23:57:30,427 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2021-10-28 23:57:30,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:30,427 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-10-28 23:57:30,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:30,428 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-10-28 23:57:30,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 23:57:30,428 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:30,429 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:30,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:30,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:30,635 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:30,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:30,636 INFO L85 PathProgramCache]: Analyzing trace with hash 51922155, now seen corresponding path program 12 times [2021-10-28 23:57:30,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:30,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839837600] [2021-10-28 23:57:30,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:30,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:30,642 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:30,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215690661] [2021-10-28 23:57:30,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:57:30,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:30,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:30,655 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:30,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-28 23:57:31,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-10-28 23:57:31,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:31,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 23:57:31,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:31,577 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:31,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:31,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839837600] [2021-10-28 23:57:31,578 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:31,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215690661] [2021-10-28 23:57:31,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215690661] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:31,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:31,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-10-28 23:57:31,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500853356] [2021-10-28 23:57:31,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 23:57:31,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:31,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 23:57:31,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:57:31,579 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:31,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:31,751 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-10-28 23:57:31,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-28 23:57:31,752 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-10-28 23:57:31,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:31,752 INFO L225 Difference]: With dead ends: 64 [2021-10-28 23:57:31,752 INFO L226 Difference]: Without dead ends: 60 [2021-10-28 23:57:31,753 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-10-28 23:57:31,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-28 23:57:31,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-10-28 23:57:31,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:31,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-10-28 23:57:31,767 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2021-10-28 23:57:31,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:31,768 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-10-28 23:57:31,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:31,769 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-10-28 23:57:31,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-28 23:57:31,769 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:31,769 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:31,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:31,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 23:57:31,976 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:31,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:31,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1595588860, now seen corresponding path program 12 times [2021-10-28 23:57:31,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:31,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254852613] [2021-10-28 23:57:31,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:31,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:31,984 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:31,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1511057459] [2021-10-28 23:57:31,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:57:31,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:31,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:31,985 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:31,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-28 23:57:37,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-10-28 23:57:37,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:37,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-28 23:57:37,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:37,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:37,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254852613] [2021-10-28 23:57:37,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:37,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511057459] [2021-10-28 23:57:37,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511057459] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:37,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:37,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-10-28 23:57:37,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114212189] [2021-10-28 23:57:37,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 23:57:37,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:37,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 23:57:37,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:57:37,800 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:38,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:38,209 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2021-10-28 23:57:38,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 23:57:38,209 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-10-28 23:57:38,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:38,210 INFO L225 Difference]: With dead ends: 66 [2021-10-28 23:57:38,210 INFO L226 Difference]: Without dead ends: 62 [2021-10-28 23:57:38,210 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:57:38,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-28 23:57:38,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-28 23:57:38,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:38,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-10-28 23:57:38,215 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 57 [2021-10-28 23:57:38,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:38,215 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-10-28 23:57:38,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:38,215 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-10-28 23:57:38,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-28 23:57:38,216 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:38,216 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:38,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-10-28 23:57:38,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 23:57:38,416 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:38,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:38,417 INFO L85 PathProgramCache]: Analyzing trace with hash -23194689, now seen corresponding path program 13 times [2021-10-28 23:57:38,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:38,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289972453] [2021-10-28 23:57:38,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:38,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:38,424 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:38,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071334572] [2021-10-28 23:57:38,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:57:38,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:38,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:38,425 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:38,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-28 23:57:38,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:38,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-28 23:57:38,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:39,147 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:39,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:39,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289972453] [2021-10-28 23:57:39,148 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:39,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071334572] [2021-10-28 23:57:39,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071334572] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:39,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:39,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-10-28 23:57:39,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752041709] [2021-10-28 23:57:39,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 23:57:39,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:39,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 23:57:39,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:57:39,151 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:39,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:39,308 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2021-10-28 23:57:39,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 23:57:39,309 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-10-28 23:57:39,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:39,310 INFO L225 Difference]: With dead ends: 68 [2021-10-28 23:57:39,310 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 23:57:39,311 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-10-28 23:57:39,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 23:57:39,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-28 23:57:39,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:39,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2021-10-28 23:57:39,317 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 59 [2021-10-28 23:57:39,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:39,317 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2021-10-28 23:57:39,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:39,318 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2021-10-28 23:57:39,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-28 23:57:39,318 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:39,318 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:39,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:39,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 23:57:39,542 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:39,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:39,543 INFO L85 PathProgramCache]: Analyzing trace with hash -768431912, now seen corresponding path program 13 times [2021-10-28 23:57:39,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:39,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954646106] [2021-10-28 23:57:39,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:39,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:39,557 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:39,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531008972] [2021-10-28 23:57:39,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:57:39,560 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:39,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:39,560 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:39,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-28 23:57:40,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:40,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-28 23:57:40,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:41,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:41,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954646106] [2021-10-28 23:57:41,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:41,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531008972] [2021-10-28 23:57:41,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531008972] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:41,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:41,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-10-28 23:57:41,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55659776] [2021-10-28 23:57:41,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 23:57:41,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:41,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 23:57:41,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:57:41,347 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:41,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:41,875 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-10-28 23:57:41,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 23:57:41,875 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-10-28 23:57:41,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:41,876 INFO L225 Difference]: With dead ends: 70 [2021-10-28 23:57:41,876 INFO L226 Difference]: Without dead ends: 66 [2021-10-28 23:57:41,876 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-10-28 23:57:41,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-28 23:57:41,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-10-28 23:57:41,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-10-28 23:57:41,882 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 61 [2021-10-28 23:57:41,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:41,882 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-10-28 23:57:41,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:41,883 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-10-28 23:57:41,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-28 23:57:41,883 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:41,883 INFO L513 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:41,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:42,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:42,091 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:42,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:42,092 INFO L85 PathProgramCache]: Analyzing trace with hash 305682579, now seen corresponding path program 14 times [2021-10-28 23:57:42,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:42,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435569478] [2021-10-28 23:57:42,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:42,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:42,101 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:42,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335109049] [2021-10-28 23:57:42,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:57:42,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:42,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:42,104 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:42,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-28 23:57:42,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:57:42,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:42,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-28 23:57:42,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:42,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:42,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435569478] [2021-10-28 23:57:42,908 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:42,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335109049] [2021-10-28 23:57:42,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335109049] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:42,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:42,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-10-28 23:57:42,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917215036] [2021-10-28 23:57:42,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 23:57:42,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:42,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 23:57:42,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:57:42,911 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:43,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:43,099 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2021-10-28 23:57:43,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-28 23:57:43,099 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-10-28 23:57:43,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:43,100 INFO L225 Difference]: With dead ends: 72 [2021-10-28 23:57:43,100 INFO L226 Difference]: Without dead ends: 68 [2021-10-28 23:57:43,100 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-10-28 23:57:43,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-28 23:57:43,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-10-28 23:57:43,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:43,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-10-28 23:57:43,104 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 63 [2021-10-28 23:57:43,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:43,105 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-10-28 23:57:43,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:43,105 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-10-28 23:57:43,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-28 23:57:43,106 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:43,106 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:43,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-10-28 23:57:43,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-28 23:57:43,310 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:43,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:43,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1750010028, now seen corresponding path program 14 times [2021-10-28 23:57:43,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:43,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518347362] [2021-10-28 23:57:43,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:43,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:43,326 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:43,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750589105] [2021-10-28 23:57:43,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:57:43,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:43,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:43,327 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:43,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-28 23:57:44,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:57:44,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:44,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 64 conjunts are in the unsatisfiable core [2021-10-28 23:57:44,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:45,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:45,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518347362] [2021-10-28 23:57:45,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:45,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750589105] [2021-10-28 23:57:45,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750589105] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:45,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:45,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-10-28 23:57:45,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594185642] [2021-10-28 23:57:45,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 23:57:45,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:45,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 23:57:45,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:57:45,385 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:45,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:45,959 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2021-10-28 23:57:45,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 23:57:45,960 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-10-28 23:57:45,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:45,960 INFO L225 Difference]: With dead ends: 74 [2021-10-28 23:57:45,960 INFO L226 Difference]: Without dead ends: 70 [2021-10-28 23:57:45,961 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:57:45,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-28 23:57:45,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-10-28 23:57:45,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:45,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2021-10-28 23:57:45,966 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 65 [2021-10-28 23:57:45,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:45,967 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2021-10-28 23:57:45,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:45,967 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2021-10-28 23:57:45,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-28 23:57:45,968 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:45,968 INFO L513 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:45,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:46,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:46,176 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:46,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:46,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1833168025, now seen corresponding path program 15 times [2021-10-28 23:57:46,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:46,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457940321] [2021-10-28 23:57:46,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:46,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:46,186 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:46,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [415314540] [2021-10-28 23:57:46,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:57:46,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:46,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:46,189 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:46,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-28 23:57:47,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-10-28 23:57:47,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:47,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-28 23:57:47,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:47,472 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:47,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:47,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457940321] [2021-10-28 23:57:47,473 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:47,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415314540] [2021-10-28 23:57:47,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415314540] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:47,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:47,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-10-28 23:57:47,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457791333] [2021-10-28 23:57:47,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 23:57:47,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:47,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 23:57:47,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:57:47,475 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:47,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:47,688 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-10-28 23:57:47,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-28 23:57:47,688 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-10-28 23:57:47,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:47,689 INFO L225 Difference]: With dead ends: 76 [2021-10-28 23:57:47,689 INFO L226 Difference]: Without dead ends: 72 [2021-10-28 23:57:47,690 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 23:57:47,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-28 23:57:47,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-10-28 23:57:47,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:47,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-10-28 23:57:47,696 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 67 [2021-10-28 23:57:47,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:47,697 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-10-28 23:57:47,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:47,697 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-10-28 23:57:47,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-10-28 23:57:47,698 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:47,698 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:47,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-10-28 23:57:47,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:47,906 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:47,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:47,907 INFO L85 PathProgramCache]: Analyzing trace with hash -691052928, now seen corresponding path program 15 times [2021-10-28 23:57:47,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:47,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850154211] [2021-10-28 23:57:47,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:47,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:47,915 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:47,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300018986] [2021-10-28 23:57:47,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:57:47,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:47,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:47,916 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:47,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-28 23:57:49,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-10-28 23:57:49,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:49,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 68 conjunts are in the unsatisfiable core [2021-10-28 23:57:49,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:49,951 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:49,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:49,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850154211] [2021-10-28 23:57:49,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:49,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300018986] [2021-10-28 23:57:49,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300018986] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:49,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:49,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-10-28 23:57:49,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741982084] [2021-10-28 23:57:49,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 23:57:49,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:49,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 23:57:49,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-10-28 23:57:49,953 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:50,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:50,745 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2021-10-28 23:57:50,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 23:57:50,746 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-10-28 23:57:50,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:50,747 INFO L225 Difference]: With dead ends: 78 [2021-10-28 23:57:50,747 INFO L226 Difference]: Without dead ends: 74 [2021-10-28 23:57:50,747 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-10-28 23:57:50,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-28 23:57:50,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-10-28 23:57:50,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:50,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-10-28 23:57:50,754 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 69 [2021-10-28 23:57:50,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:50,754 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-10-28 23:57:50,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:50,754 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-10-28 23:57:50,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-28 23:57:50,755 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:50,755 INFO L513 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:50,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:50,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-28 23:57:50,958 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:50,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:50,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1652442171, now seen corresponding path program 16 times [2021-10-28 23:57:50,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:50,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553876080] [2021-10-28 23:57:50,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:50,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:50,972 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:50,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [584208975] [2021-10-28 23:57:50,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:57:50,972 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:50,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:50,975 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:50,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-28 23:57:51,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:57:51,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:51,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 23:57:51,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:51,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:51,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553876080] [2021-10-28 23:57:51,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:51,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584208975] [2021-10-28 23:57:51,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584208975] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:51,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:51,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-10-28 23:57:51,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112629323] [2021-10-28 23:57:51,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 23:57:51,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:51,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 23:57:51,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-10-28 23:57:51,933 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:52,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:52,132 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2021-10-28 23:57:52,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-28 23:57:52,132 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-10-28 23:57:52,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:52,133 INFO L225 Difference]: With dead ends: 80 [2021-10-28 23:57:52,133 INFO L226 Difference]: Without dead ends: 76 [2021-10-28 23:57:52,134 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 23:57:52,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-28 23:57:52,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-10-28 23:57:52,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:52,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2021-10-28 23:57:52,141 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2021-10-28 23:57:52,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:52,141 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2021-10-28 23:57:52,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:52,141 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2021-10-28 23:57:52,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-28 23:57:52,142 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:52,142 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:52,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:52,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-28 23:57:52,374 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:52,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:52,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1094145452, now seen corresponding path program 16 times [2021-10-28 23:57:52,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:52,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853008335] [2021-10-28 23:57:52,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:52,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:52,383 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:52,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818146876] [2021-10-28 23:57:52,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:57:52,383 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:52,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:52,389 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:52,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-28 23:57:53,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:57:53,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:53,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 73 conjunts are in the unsatisfiable core [2021-10-28 23:57:53,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:54,604 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:54,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:54,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853008335] [2021-10-28 23:57:54,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:54,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818146876] [2021-10-28 23:57:54,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818146876] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:54,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:54,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-10-28 23:57:54,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239255872] [2021-10-28 23:57:54,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 23:57:54,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:54,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 23:57:54,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:57:54,606 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:55,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:55,100 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2021-10-28 23:57:55,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 23:57:55,101 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-10-28 23:57:55,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:55,102 INFO L225 Difference]: With dead ends: 82 [2021-10-28 23:57:55,102 INFO L226 Difference]: Without dead ends: 78 [2021-10-28 23:57:55,102 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:57:55,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-28 23:57:55,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-10-28 23:57:55,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:55,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-10-28 23:57:55,110 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 73 [2021-10-28 23:57:55,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:55,110 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-10-28 23:57:55,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:55,111 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-10-28 23:57:55,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-28 23:57:55,111 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:55,111 INFO L513 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:55,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:55,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-28 23:57:55,320 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:55,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:55,321 INFO L85 PathProgramCache]: Analyzing trace with hash 827583247, now seen corresponding path program 17 times [2021-10-28 23:57:55,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:55,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18384160] [2021-10-28 23:57:55,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:55,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:55,337 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:57:55,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337939474] [2021-10-28 23:57:55,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:57:55,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:55,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:55,338 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:55,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-28 23:57:59,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-10-28 23:57:59,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:59,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-28 23:57:59,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:59,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:59,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18384160] [2021-10-28 23:57:59,641 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:57:59,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337939474] [2021-10-28 23:57:59,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337939474] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:59,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:57:59,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-10-28 23:57:59,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922328568] [2021-10-28 23:57:59,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 23:57:59,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:59,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 23:57:59,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:57:59,644 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:59,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:59,876 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2021-10-28 23:57:59,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-28 23:57:59,876 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-10-28 23:57:59,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:59,877 INFO L225 Difference]: With dead ends: 84 [2021-10-28 23:57:59,877 INFO L226 Difference]: Without dead ends: 80 [2021-10-28 23:57:59,878 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 23:57:59,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-28 23:57:59,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-10-28 23:57:59,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:59,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2021-10-28 23:57:59,882 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 75 [2021-10-28 23:57:59,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:59,883 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2021-10-28 23:57:59,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:59,883 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2021-10-28 23:57:59,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-28 23:57:59,883 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:59,883 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:59,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-10-28 23:58:00,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-28 23:58:00,084 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:58:00,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:58:00,085 INFO L85 PathProgramCache]: Analyzing trace with hash 785378344, now seen corresponding path program 17 times [2021-10-28 23:58:00,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:58:00,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228519370] [2021-10-28 23:58:00,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:58:00,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:58:00,113 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:58:00,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1726420812] [2021-10-28 23:58:00,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:58:00,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:58:00,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:58:00,114 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:58:00,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-28 23:58:05,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-10-28 23:58:05,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:58:05,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 76 conjunts are in the unsatisfiable core [2021-10-28 23:58:05,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:58:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:58:06,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:58:06,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228519370] [2021-10-28 23:58:06,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:58:06,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726420812] [2021-10-28 23:58:06,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726420812] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:58:06,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:58:06,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-10-28 23:58:06,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878083272] [2021-10-28 23:58:06,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 23:58:06,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:58:06,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 23:58:06,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-10-28 23:58:06,118 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:06,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:58:06,692 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2021-10-28 23:58:06,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-28 23:58:06,692 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-10-28 23:58:06,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:58:06,693 INFO L225 Difference]: With dead ends: 86 [2021-10-28 23:58:06,693 INFO L226 Difference]: Without dead ends: 82 [2021-10-28 23:58:06,694 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2021-10-28 23:58:06,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-28 23:58:06,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-10-28 23:58:06,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:06,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2021-10-28 23:58:06,701 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2021-10-28 23:58:06,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:58:06,701 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2021-10-28 23:58:06,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:06,702 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2021-10-28 23:58:06,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-28 23:58:06,702 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:58:06,703 INFO L513 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2021-10-28 23:58:06,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-10-28 23:58:06,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-28 23:58:06,915 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:58:06,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:58:06,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1131280413, now seen corresponding path program 18 times [2021-10-28 23:58:06,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:58:06,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484255300] [2021-10-28 23:58:06,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:58:06,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:58:06,925 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:58:06,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720827673] [2021-10-28 23:58:06,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:58:06,925 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:58:06,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:58:06,926 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:58:06,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-28 23:58:08,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-10-28 23:58:08,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:58:08,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-28 23:58:08,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:58:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:58:08,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:58:08,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484255300] [2021-10-28 23:58:08,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:58:08,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720827673] [2021-10-28 23:58:08,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720827673] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:58:08,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:58:08,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-10-28 23:58:08,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360852146] [2021-10-28 23:58:08,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 23:58:08,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:58:08,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 23:58:08,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-10-28 23:58:08,931 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:09,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:58:09,156 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-10-28 23:58:09,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-28 23:58:09,156 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-10-28 23:58:09,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:58:09,157 INFO L225 Difference]: With dead ends: 88 [2021-10-28 23:58:09,157 INFO L226 Difference]: Without dead ends: 84 [2021-10-28 23:58:09,158 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 23:58:09,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-28 23:58:09,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-10-28 23:58:09,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-10-28 23:58:09,162 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 79 [2021-10-28 23:58:09,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:58:09,163 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-10-28 23:58:09,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:09,163 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-10-28 23:58:09,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-10-28 23:58:09,164 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:58:09,164 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 1, 1, 1, 1, 1, 1] [2021-10-28 23:58:09,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-28 23:58:09,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-28 23:58:09,370 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:58:09,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:58:09,371 INFO L85 PathProgramCache]: Analyzing trace with hash -486923268, now seen corresponding path program 18 times [2021-10-28 23:58:09,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:58:09,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816939781] [2021-10-28 23:58:09,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:58:09,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:58:09,387 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:58:09,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906895254] [2021-10-28 23:58:09,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:58:09,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:58:09,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:58:09,389 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:58:09,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-28 23:58:11,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-10-28 23:58:11,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:58:11,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 80 conjunts are in the unsatisfiable core [2021-10-28 23:58:11,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:58:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:58:11,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:58:11,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816939781] [2021-10-28 23:58:11,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:58:11,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906895254] [2021-10-28 23:58:11,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906895254] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:58:11,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:58:11,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-10-28 23:58:11,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98857450] [2021-10-28 23:58:11,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 23:58:11,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:58:11,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 23:58:11,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:58:11,948 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:12,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:58:12,489 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2021-10-28 23:58:12,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 23:58:12,489 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-10-28 23:58:12,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:58:12,490 INFO L225 Difference]: With dead ends: 90 [2021-10-28 23:58:12,490 INFO L226 Difference]: Without dead ends: 86 [2021-10-28 23:58:12,490 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2021-10-28 23:58:12,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-28 23:58:12,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-10-28 23:58:12,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:12,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2021-10-28 23:58:12,497 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 81 [2021-10-28 23:58:12,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:58:12,497 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2021-10-28 23:58:12,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:12,498 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2021-10-28 23:58:12,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-10-28 23:58:12,498 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:58:12,499 INFO L513 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2021-10-28 23:58:12,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-28 23:58:12,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-28 23:58:12,702 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:58:12,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:58:12,703 INFO L85 PathProgramCache]: Analyzing trace with hash 252549815, now seen corresponding path program 19 times [2021-10-28 23:58:12,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:58:12,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641016386] [2021-10-28 23:58:12,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:58:12,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:58:12,720 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:58:12,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081008250] [2021-10-28 23:58:12,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:58:12,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:58:12,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:58:12,722 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:58:12,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-28 23:58:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:58:13,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-28 23:58:13,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:58:13,977 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:58:13,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:58:13,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641016386] [2021-10-28 23:58:13,977 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:58:13,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081008250] [2021-10-28 23:58:13,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081008250] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:58:13,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:58:13,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-10-28 23:58:13,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205224192] [2021-10-28 23:58:13,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 23:58:13,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:58:13,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 23:58:13,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:58:13,979 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:14,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:58:14,253 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2021-10-28 23:58:14,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-28 23:58:14,253 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-10-28 23:58:14,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:58:14,254 INFO L225 Difference]: With dead ends: 92 [2021-10-28 23:58:14,254 INFO L226 Difference]: Without dead ends: 88 [2021-10-28 23:58:14,255 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 23:58:14,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-28 23:58:14,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-10-28 23:58:14,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:14,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2021-10-28 23:58:14,262 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2021-10-28 23:58:14,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:58:14,262 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2021-10-28 23:58:14,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:14,263 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2021-10-28 23:58:14,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-28 23:58:14,263 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:58:14,263 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 1, 1, 1, 1, 1, 1] [2021-10-28 23:58:14,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-10-28 23:58:14,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:58:14,464 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:58:14,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:58:14,464 INFO L85 PathProgramCache]: Analyzing trace with hash -2065935920, now seen corresponding path program 19 times [2021-10-28 23:58:14,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:58:14,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460695743] [2021-10-28 23:58:14,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:58:14,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:58:14,487 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:58:14,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134320275] [2021-10-28 23:58:14,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:58:14,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:58:14,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:58:14,489 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:58:14,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-28 23:58:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:58:15,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 84 conjunts are in the unsatisfiable core [2021-10-28 23:58:15,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:58:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:58:16,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:58:16,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460695743] [2021-10-28 23:58:16,637 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:58:16,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134320275] [2021-10-28 23:58:16,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134320275] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:58:16,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:58:16,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-10-28 23:58:16,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619723951] [2021-10-28 23:58:16,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-28 23:58:16,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:58:16,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-28 23:58:16,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-10-28 23:58:16,639 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:17,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:58:17,278 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2021-10-28 23:58:17,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 23:58:17,278 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-10-28 23:58:17,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:58:17,279 INFO L225 Difference]: With dead ends: 94 [2021-10-28 23:58:17,279 INFO L226 Difference]: Without dead ends: 90 [2021-10-28 23:58:17,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=595, Unknown=0, NotChecked=0, Total=650 [2021-10-28 23:58:17,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-28 23:58:17,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-10-28 23:58:17,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:17,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2021-10-28 23:58:17,287 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 85 [2021-10-28 23:58:17,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:58:17,287 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2021-10-28 23:58:17,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:17,287 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2021-10-28 23:58:17,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-10-28 23:58:17,288 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:58:17,288 INFO L513 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2021-10-28 23:58:17,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-10-28 23:58:17,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:58:17,494 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:58:17,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:58:17,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1055153269, now seen corresponding path program 20 times [2021-10-28 23:58:17,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:58:17,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311538197] [2021-10-28 23:58:17,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:58:17,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:58:17,520 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:58:17,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74655364] [2021-10-28 23:58:17,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:58:17,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:58:17,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:58:17,526 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:58:17,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-28 23:58:19,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:58:19,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-28 23:58:19,139 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:58:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:58:19,419 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:58:19,419 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 23:58:19,420 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:58:19,422 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:58:19,422 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:58:19,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-28 23:58:19,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-10-28 23:58:19,636 INFO L731 BasicCegarLoop]: Path program histogram: [20, 19, 3, 1] [2021-10-28 23:58:19,639 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:58:19,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:58:19 BoogieIcfgContainer [2021-10-28 23:58:19,722 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:58:19,723 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:58:19,723 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:58:19,723 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:58:19,724 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:57:04" (3/4) ... [2021-10-28 23:58:19,725 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 23:58:19,827 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:58:19,828 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:58:19,829 INFO L168 Benchmark]: Toolchain (without parser) took 75512.50 ms. Allocated memory was 113.2 MB in the beginning and 251.7 MB in the end (delta: 138.4 MB). Free memory was 72.0 MB in the beginning and 63.1 MB in the end (delta: 8.9 MB). Peak memory consumption was 147.8 MB. Max. memory is 16.1 GB. [2021-10-28 23:58:19,830 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 113.2 MB. Free memory is still 88.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:58:19,831 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.59 ms. Allocated memory is still 113.2 MB. Free memory was 71.7 MB in the beginning and 88.0 MB in the end (delta: -16.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:58:19,831 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.28 ms. Allocated memory is still 113.2 MB. Free memory was 88.0 MB in the beginning and 86.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:58:19,831 INFO L168 Benchmark]: Boogie Preprocessor took 21.74 ms. Allocated memory is still 113.2 MB. Free memory was 86.3 MB in the beginning and 85.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:58:19,837 INFO L168 Benchmark]: RCFGBuilder took 310.12 ms. Allocated memory is still 113.2 MB. Free memory was 85.3 MB in the beginning and 75.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:58:19,838 INFO L168 Benchmark]: TraceAbstraction took 74750.17 ms. Allocated memory was 113.2 MB in the beginning and 251.7 MB in the end (delta: 138.4 MB). Free memory was 74.8 MB in the beginning and 70.0 MB in the end (delta: 4.8 MB). Peak memory consumption was 143.7 MB. Max. memory is 16.1 GB. [2021-10-28 23:58:19,841 INFO L168 Benchmark]: Witness Printer took 105.15 ms. Allocated memory is still 251.7 MB. Free memory was 70.0 MB in the beginning and 63.1 MB in the end (delta: 6.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:58:19,844 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 113.2 MB. Free memory is still 88.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 275.59 ms. Allocated memory is still 113.2 MB. Free memory was 71.7 MB in the beginning and 88.0 MB in the end (delta: -16.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.28 ms. Allocated memory is still 113.2 MB. Free memory was 88.0 MB in the beginning and 86.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.74 ms. Allocated memory is still 113.2 MB. Free memory was 86.3 MB in the beginning and 85.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 310.12 ms. Allocated memory is still 113.2 MB. Free memory was 85.3 MB in the beginning and 75.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 74750.17 ms. Allocated memory was 113.2 MB in the beginning and 251.7 MB in the end (delta: 138.4 MB). Free memory was 74.8 MB in the beginning and 70.0 MB in the end (delta: 4.8 MB). Peak memory consumption was 143.7 MB. Max. memory is 16.1 GB. * Witness Printer took 105.15 ms. Allocated memory is still 251.7 MB. Free memory was 70.0 MB in the beginning and 63.1 MB in the end (delta: 6.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [counter=0] [L27] EXPR counter++ VAL [counter=1] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=1] [L27] EXPR counter++ VAL [counter=2] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=2] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=2] [L27] EXPR counter++ VAL [counter=3] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=3] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=3] [L27] EXPR counter++ VAL [counter=4] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=4] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=4] [L27] EXPR counter++ VAL [counter=5] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=5] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=5] [L27] EXPR counter++ VAL [counter=6] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=6] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=6] [L27] EXPR counter++ VAL [counter=7] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=7] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=7] [L27] EXPR counter++ VAL [counter=8] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=8] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=8] [L27] EXPR counter++ VAL [counter=9] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=9] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=9] [L27] EXPR counter++ VAL [counter=10] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=10] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=10] [L27] EXPR counter++ VAL [counter=11] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=11] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=11] [L27] EXPR counter++ VAL [counter=12] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=12] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=12] [L27] EXPR counter++ VAL [counter=13] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=13] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=13] [L27] EXPR counter++ VAL [counter=14] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=14] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=14] [L27] EXPR counter++ VAL [counter=15] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=15] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=15] [L27] EXPR counter++ VAL [counter=16] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=16] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=16] [L27] EXPR counter++ VAL [counter=17] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=17] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=17] [L27] EXPR counter++ VAL [counter=18] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=18] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=18] [L27] EXPR counter++ VAL [counter=19] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=19] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=19] [L27] EXPR counter++ VAL [counter=20] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=20] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=20] [L27] EXPR counter++ VAL [counter=21] [L27] COND FALSE !(counter++<20) [L10] COND TRUE !(cond) VAL [counter=21] [L12] reach_error() VAL [counter=21] - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 74.6s, OverallIterations: 43, TraceHistogramMax: 21, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 10.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 762 SDtfs, 176 SDslu, 7931 SDs, 0 SdLazy, 8271 SolverSat, 85 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2066 GetRequests, 1343 SyntacticMatches, 0 SemanticMatches, 723 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 5.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=42, InterpolantAutomatonStates: 767, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 42 MinimizatonAttempts, 16 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 25.7s SatisfiabilityAnalysisTime, 13.6s InterpolantComputationTime, 1959 NumberOfCodeBlocks, 1951 NumberOfCodeBlocksAsserted, 250 NumberOfCheckSat, 1830 ConstructedInterpolants, 0 QuantifiedInterpolants, 9431 SizeOfPredicates, 283 NumberOfNonLiveVariables, 8952 ConjunctsInSsa, 1403 ConjunctsInUnsatCore, 42 InterpolantComputations, 1 PerfectInterpolantSequences, 20/10294 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-28 23:58:19,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74eb38a5-ec0d-4e70-a656-485377aa6a54/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...