./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound10.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_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg --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 ebfcdae9f2d92c4e39230ecf30ad4ac0897188e9aff6dcbde95509d87ea826ad .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 08:43:58,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:43:58,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:43:58,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:43:58,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:43:58,956 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:43:58,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:43:58,965 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:43:58,968 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:43:58,978 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:43:58,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:43:58,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:43:58,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:43:58,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:43:58,988 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:43:58,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:43:59,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:43:59,002 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:43:59,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:43:59,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:43:59,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:43:59,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:43:59,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:43:59,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:43:59,032 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:43:59,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:43:59,033 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:43:59,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:43:59,036 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:43:59,038 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:43:59,038 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:43:59,040 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:43:59,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:43:59,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:43:59,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:43:59,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:43:59,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:43:59,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:43:59,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:43:59,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:43:59,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:43:59,051 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 08:43:59,107 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:43:59,108 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:43:59,109 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:43:59,116 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:43:59,118 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:43:59,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:43:59,119 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:43:59,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:43:59,120 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:43:59,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:43:59,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:43:59,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:43:59,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 08:43:59,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:43:59,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 08:43:59,123 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:43:59,124 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 08:43:59,124 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:43:59,124 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 08:43:59,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:43:59,125 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:43:59,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:43:59,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:43:59,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:43:59,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:43:59,126 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 08:43:59,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 08:43:59,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 08:43:59,127 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 08:43:59,130 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 08:43:59,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 08:43:59,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:43:59,131 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_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebfcdae9f2d92c4e39230ecf30ad4ac0897188e9aff6dcbde95509d87ea826ad [2021-10-28 08:43:59,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:43:59,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:43:59,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:43:59,476 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:43:59,477 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:43:59,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound10.c [2021-10-28 08:43:59,580 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/data/dfa6df824/3e3e96f6e2844750ab639fef870058c6/FLAGfd595c75c [2021-10-28 08:44:00,152 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:44:00,154 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound10.c [2021-10-28 08:44:00,168 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/data/dfa6df824/3e3e96f6e2844750ab639fef870058c6/FLAGfd595c75c [2021-10-28 08:44:00,478 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/data/dfa6df824/3e3e96f6e2844750ab639fef870058c6 [2021-10-28 08:44:00,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:44:00,486 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 08:44:00,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:44:00,489 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:44:00,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:44:00,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:44:00" (1/1) ... [2021-10-28 08:44:00,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ed19055 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:44:00, skipping insertion in model container [2021-10-28 08:44:00,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:44:00" (1/1) ... [2021-10-28 08:44:00,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:44:00,522 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:44:00,739 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_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound10.c[458,471] [2021-10-28 08:44:00,764 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:44:00,776 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:44:00,792 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_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound10.c[458,471] [2021-10-28 08:44:00,802 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:44:00,818 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:44:00,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:44:00 WrapperNode [2021-10-28 08:44:00,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:44:00,820 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 08:44:00,820 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 08:44:00,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 08:44:00,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:44:00" (1/1) ... [2021-10-28 08:44:00,840 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:44:00" (1/1) ... [2021-10-28 08:44:00,872 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 08:44:00,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:44:00,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:44:00,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:44:00,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:44:00" (1/1) ... [2021-10-28 08:44:00,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:44:00" (1/1) ... [2021-10-28 08:44:00,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:44:00" (1/1) ... [2021-10-28 08:44:00,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:44:00" (1/1) ... [2021-10-28 08:44:00,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:44:00" (1/1) ... [2021-10-28 08:44:00,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:44:00" (1/1) ... [2021-10-28 08:44:00,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:44:00" (1/1) ... [2021-10-28 08:44:00,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:44:00,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:44:00,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:44:00,923 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:44:00,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:44:00" (1/1) ... [2021-10-28 08:44:00,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:44:00,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:00,960 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:44:00,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:44:01,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 08:44:01,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:44:01,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:44:01,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:44:01,385 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:44:01,385 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-28 08:44:01,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:44:01 BoogieIcfgContainer [2021-10-28 08:44:01,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:44:01,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:44:01,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:44:01,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:44:01,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:44:00" (1/3) ... [2021-10-28 08:44:01,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef62d89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:44:01, skipping insertion in model container [2021-10-28 08:44:01,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:44:00" (2/3) ... [2021-10-28 08:44:01,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef62d89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:44:01, skipping insertion in model container [2021-10-28 08:44:01,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:44:01" (3/3) ... [2021-10-28 08:44:01,396 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound10.c [2021-10-28 08:44:01,402 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:44:01,402 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-28 08:44:01,456 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:44:01,464 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 08:44:01,465 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-28 08:44:01,482 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 21 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 08:44:01,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 08:44:01,487 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:01,488 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:01,488 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:44:01,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:01,495 INFO L85 PathProgramCache]: Analyzing trace with hash 120120651, now seen corresponding path program 1 times [2021-10-28 08:44:01,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:01,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710680627] [2021-10-28 08:44:01,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:01,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:01,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:01,689 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 08:44:01,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:01,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710680627] [2021-10-28 08:44:01,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710680627] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:44:01,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:44:01,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 08:44:01,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344232963] [2021-10-28 08:44:01,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 08:44:01,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:01,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 08:44:01,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 08:44:01,723 INFO L87 Difference]: Start difference. First operand has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 21 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) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:44:01,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:01,745 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2021-10-28 08:44:01,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 08:44:01,747 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-28 08:44:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:01,757 INFO L225 Difference]: With dead ends: 41 [2021-10-28 08:44:01,758 INFO L226 Difference]: Without dead ends: 18 [2021-10-28 08:44:01,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 08:44:01,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-28 08:44:01,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-28 08:44:01,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 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 08:44:01,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-10-28 08:44:01,805 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2021-10-28 08:44:01,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:01,807 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-10-28 08:44:01,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:44:01,807 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-10-28 08:44:01,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 08:44:01,809 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:01,809 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:01,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 08:44:01,811 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 08:44:01,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:01,816 INFO L85 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-10-28 08:44:01,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:01,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513237940] [2021-10-28 08:44:01,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:01,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:01,864 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:44:01,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043160531] [2021-10-28 08:44:01,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:01,866 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:01,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:01,872 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:01,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 08:44:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:01,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 08:44:01,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:02,141 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 08:44:02,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:02,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513237940] [2021-10-28 08:44:02,142 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:44:02,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043160531] [2021-10-28 08:44:02,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043160531] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:44:02,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:44:02,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:44:02,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622340115] [2021-10-28 08:44:02,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:44:02,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:02,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:44:02,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:44:02,147 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:44:02,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:02,429 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-10-28 08:44:02,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:44:02,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-28 08:44:02,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:02,431 INFO L225 Difference]: With dead ends: 36 [2021-10-28 08:44:02,431 INFO L226 Difference]: Without dead ends: 25 [2021-10-28 08:44:02,432 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 08:44:02,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-28 08:44:02,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-10-28 08:44:02,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.2105263157894737) 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 08:44:02,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-10-28 08:44:02,438 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 8 [2021-10-28 08:44:02,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:02,438 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-10-28 08:44:02,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:44:02,439 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-10-28 08:44:02,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 08:44:02,440 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:02,440 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:02,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:02,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:02,660 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:44:02,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:02,661 INFO L85 PathProgramCache]: Analyzing trace with hash -938089448, now seen corresponding path program 1 times [2021-10-28 08:44:02,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:02,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031129945] [2021-10-28 08:44:02,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:02,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:02,691 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:44:02,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049242485] [2021-10-28 08:44:02,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:02,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:02,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:02,700 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:02,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 08:44:02,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:02,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 08:44:02,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:03,009 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 08:44:03,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:03,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031129945] [2021-10-28 08:44:03,010 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:44:03,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049242485] [2021-10-28 08:44:03,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049242485] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:03,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:44:03,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-28 08:44:03,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166819092] [2021-10-28 08:44:03,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:44:03,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:03,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:44:03,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:44:03,013 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:44:03,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:03,119 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-10-28 08:44:03,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:44:03,120 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-28 08:44:03,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:03,122 INFO L225 Difference]: With dead ends: 39 [2021-10-28 08:44:03,123 INFO L226 Difference]: Without dead ends: 35 [2021-10-28 08:44:03,123 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 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 08:44:03,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-28 08:44:03,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2021-10-28 08:44:03,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.24) internal successors, (31), 27 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 08:44:03,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-10-28 08:44:03,140 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2021-10-28 08:44:03,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:03,140 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-10-28 08:44:03,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:44:03,141 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-10-28 08:44:03,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 08:44:03,143 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:03,143 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:03,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:03,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:03,350 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:44:03,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:03,351 INFO L85 PathProgramCache]: Analyzing trace with hash 687671895, now seen corresponding path program 1 times [2021-10-28 08:44:03,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:03,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8275854] [2021-10-28 08:44:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:03,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:03,367 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:44:03,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [932924812] [2021-10-28 08:44:03,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:03,368 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:03,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:03,369 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:03,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 08:44:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:03,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 08:44:03,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:03,515 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 08:44:03,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:03,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8275854] [2021-10-28 08:44:03,516 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:44:03,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932924812] [2021-10-28 08:44:03,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932924812] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:03,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:44:03,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-28 08:44:03,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268083083] [2021-10-28 08:44:03,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:44:03,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:03,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:44:03,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:44:03,519 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 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 08:44:03,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:03,567 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-10-28 08:44:03,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 08:44:03,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 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 08:44:03,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:03,571 INFO L225 Difference]: With dead ends: 34 [2021-10-28 08:44:03,571 INFO L226 Difference]: Without dead ends: 28 [2021-10-28 08:44:03,572 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 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 08:44:03,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-28 08:44:03,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-28 08:44:03,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:44:03,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-10-28 08:44:03,581 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 15 [2021-10-28 08:44:03,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:03,582 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-10-28 08:44:03,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 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 08:44:03,582 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-10-28 08:44:03,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 08:44:03,585 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:03,585 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:03,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:03,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:03,801 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 08:44:03,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:03,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1290921348, now seen corresponding path program 2 times [2021-10-28 08:44:03,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:03,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565574360] [2021-10-28 08:44:03,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:03,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:03,815 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:44:03,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856803995] [2021-10-28 08:44:03,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:44:03,827 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:03,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:03,828 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:03,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 08:44:03,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:44:03,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:44:03,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 08:44:03,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:04,162 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 08:44:04,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:04,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565574360] [2021-10-28 08:44:04,163 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:44:04,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856803995] [2021-10-28 08:44:04,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856803995] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:04,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:44:04,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 08:44:04,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107276577] [2021-10-28 08:44:04,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 08:44:04,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:04,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 08:44:04,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:44:04,178 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:44:04,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:04,330 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-10-28 08:44:04,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:44:04,331 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-10-28 08:44:04,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:04,332 INFO L225 Difference]: With dead ends: 49 [2021-10-28 08:44:04,332 INFO L226 Difference]: Without dead ends: 45 [2021-10-28 08:44:04,332 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 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 08:44:04,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-28 08:44:04,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2021-10-28 08:44:04,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:44:04,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-10-28 08:44:04,339 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 16 [2021-10-28 08:44:04,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:04,340 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-10-28 08:44:04,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:44:04,340 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-10-28 08:44:04,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 08:44:04,341 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:04,341 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:04,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:04,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:04,568 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:44:04,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:04,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1329593552, now seen corresponding path program 1 times [2021-10-28 08:44:04,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:04,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341157590] [2021-10-28 08:44:04,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:04,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:04,583 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:44:04,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991964239] [2021-10-28 08:44:04,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:04,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:04,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:04,587 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:04,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 08:44:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:04,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 08:44:04,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:05,003 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 08:44:05,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:05,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341157590] [2021-10-28 08:44:05,004 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:44:05,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991964239] [2021-10-28 08:44:05,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991964239] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:05,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:44:05,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 08:44:05,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040761027] [2021-10-28 08:44:05,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 08:44:05,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:05,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 08:44:05,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:44:05,008 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 08:44:05,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:05,112 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-10-28 08:44:05,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 08:44:05,112 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 08:44:05,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:05,113 INFO L225 Difference]: With dead ends: 38 [2021-10-28 08:44:05,113 INFO L226 Difference]: Without dead ends: 32 [2021-10-28 08:44:05,114 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 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 08:44:05,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-28 08:44:05,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-28 08:44:05,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.206896551724138) internal successors, (35), 31 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 08:44:05,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-10-28 08:44:05,126 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 17 [2021-10-28 08:44:05,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:05,126 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-10-28 08:44:05,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 08:44:05,127 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-10-28 08:44:05,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 08:44:05,128 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:05,128 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:05,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:05,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:05,329 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:44:05,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:05,330 INFO L85 PathProgramCache]: Analyzing trace with hash 658932075, now seen corresponding path program 2 times [2021-10-28 08:44:05,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:05,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512245240] [2021-10-28 08:44:05,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:05,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:05,341 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:44:05,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278645962] [2021-10-28 08:44:05,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:44:05,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:05,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:05,343 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:05,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 08:44:05,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:44:05,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:44:05,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 08:44:05,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:05,545 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 08:44:05,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:05,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512245240] [2021-10-28 08:44:05,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:44:05,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278645962] [2021-10-28 08:44:05,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278645962] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:05,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:44:05,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-28 08:44:05,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166983387] [2021-10-28 08:44:05,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 08:44:05,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:05,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 08:44:05,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:44:05,549 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 08:44:05,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:05,644 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-10-28 08:44:05,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:44:05,645 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 08:44:05,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:05,645 INFO L225 Difference]: With dead ends: 38 [2021-10-28 08:44:05,646 INFO L226 Difference]: Without dead ends: 32 [2021-10-28 08:44:05,646 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 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 08:44:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-28 08:44:05,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-28 08:44:05,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:44:05,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-10-28 08:44:05,650 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 19 [2021-10-28 08:44:05,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:05,651 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-10-28 08:44:05,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 08:44:05,651 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-10-28 08:44:05,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 08:44:05,652 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:05,652 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:05,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:05,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:05,869 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 08:44:05,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:05,869 INFO L85 PathProgramCache]: Analyzing trace with hash 399986928, now seen corresponding path program 3 times [2021-10-28 08:44:05,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:05,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201243300] [2021-10-28 08:44:05,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:05,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:05,879 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:44:05,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007437956] [2021-10-28 08:44:05,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:44:05,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:05,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:05,881 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:05,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 08:44:06,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 08:44:06,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:44:06,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 08:44:06,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:06,277 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 08:44:06,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:06,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201243300] [2021-10-28 08:44:06,278 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:44:06,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007437956] [2021-10-28 08:44:06,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007437956] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:06,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:44:06,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-28 08:44:06,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163669388] [2021-10-28 08:44:06,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:44:06,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:06,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:44:06,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:44:06,281 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.0) 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 08:44:06,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:06,522 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-10-28 08:44:06,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:44:06,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) 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 20 [2021-10-28 08:44:06,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:06,525 INFO L225 Difference]: With dead ends: 32 [2021-10-28 08:44:06,525 INFO L226 Difference]: Without dead ends: 28 [2021-10-28 08:44:06,525 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 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 08:44:06,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-28 08:44:06,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-10-28 08:44:06,531 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 08:44:06,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-10-28 08:44:06,532 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2021-10-28 08:44:06,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:06,533 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-10-28 08:44:06,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) 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 08:44:06,533 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-10-28 08:44:06,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 08:44:06,534 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:06,534 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:06,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:06,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:06,740 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:44:06,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:06,740 INFO L85 PathProgramCache]: Analyzing trace with hash -519569692, now seen corresponding path program 2 times [2021-10-28 08:44:06,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:06,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278646909] [2021-10-28 08:44:06,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:06,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:06,756 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:44:06,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470994369] [2021-10-28 08:44:06,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:44:06,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:06,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:06,758 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:06,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 08:44:06,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:44:06,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:44:06,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 08:44:06,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:07,205 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 08:44:07,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:07,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278646909] [2021-10-28 08:44:07,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:44:07,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470994369] [2021-10-28 08:44:07,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470994369] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:07,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:44:07,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 08:44:07,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499848393] [2021-10-28 08:44:07,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:44:07,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:07,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:44:07,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:44:07,212 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:44:07,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:07,321 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-10-28 08:44:07,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:44:07,322 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-28 08:44:07,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:07,323 INFO L225 Difference]: With dead ends: 32 [2021-10-28 08:44:07,323 INFO L226 Difference]: Without dead ends: 26 [2021-10-28 08:44:07,323 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 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 08:44:07,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-28 08:44:07,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-28 08:44:07,330 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 08:44:07,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-10-28 08:44:07,331 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2021-10-28 08:44:07,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:07,331 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-10-28 08:44:07,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:44:07,332 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-10-28 08:44:07,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 08:44:07,333 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:07,333 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:07,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:07,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:07,540 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:44:07,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:07,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1729515135, now seen corresponding path program 3 times [2021-10-28 08:44:07,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:07,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545633380] [2021-10-28 08:44:07,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:07,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:07,554 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:44:07,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2056591989] [2021-10-28 08:44:07,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:44:07,555 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:07,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:07,556 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:07,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 08:44:07,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 08:44:07,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:44:07,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 08:44:07,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:07,811 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 08:44:07,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:07,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545633380] [2021-10-28 08:44:07,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:44:07,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056591989] [2021-10-28 08:44:07,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056591989] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:07,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:44:07,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 08:44:07,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151633932] [2021-10-28 08:44:07,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:44:07,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:07,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:44:07,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:44:07,815 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 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 08:44:07,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:07,872 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-10-28 08:44:07,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:44:07,873 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 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 08:44:07,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:07,874 INFO L225 Difference]: With dead ends: 34 [2021-10-28 08:44:07,874 INFO L226 Difference]: Without dead ends: 28 [2021-10-28 08:44:07,875 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 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 08:44:07,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-28 08:44:07,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-28 08:44:07,882 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 08:44:07,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-28 08:44:07,883 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2021-10-28 08:44:07,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:07,884 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-28 08:44:07,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 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 08:44:07,884 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-28 08:44:07,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-28 08:44:07,885 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:07,885 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:07,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:08,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 08:44:08,104 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:44:08,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:08,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1813567224, now seen corresponding path program 3 times [2021-10-28 08:44:08,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:08,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642103476] [2021-10-28 08:44:08,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:08,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:08,119 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:44:08,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [900179577] [2021-10-28 08:44:08,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:44:08,119 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:08,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:08,121 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:08,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 08:44:08,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 08:44:08,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:44:08,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 08:44:08,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:08,895 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 08:44:08,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:08,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642103476] [2021-10-28 08:44:08,896 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:44:08,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900179577] [2021-10-28 08:44:08,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900179577] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:08,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:44:08,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 08:44:08,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272869842] [2021-10-28 08:44:08,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:44:08,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:08,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:44:08,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:44:08,905 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 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 08:44:09,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:09,043 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-10-28 08:44:09,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:44:09,044 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 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 08:44:09,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:09,045 INFO L225 Difference]: With dead ends: 36 [2021-10-28 08:44:09,045 INFO L226 Difference]: Without dead ends: 30 [2021-10-28 08:44:09,045 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 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 08:44:09,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-28 08:44:09,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-28 08:44:09,052 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 08:44:09,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-10-28 08:44:09,054 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2021-10-28 08:44:09,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:09,055 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-10-28 08:44:09,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 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 08:44:09,055 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-10-28 08:44:09,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 08:44:09,061 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:09,061 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:09,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:09,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-28 08:44:09,262 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:44:09,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:09,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1901162899, now seen corresponding path program 4 times [2021-10-28 08:44:09,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:09,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30816247] [2021-10-28 08:44:09,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:09,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:09,275 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:44:09,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [802222038] [2021-10-28 08:44:09,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 08:44:09,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:09,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:09,284 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:09,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 08:44:09,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 08:44:09,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:44:09,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 08:44:09,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:09,561 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 08:44:09,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:09,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30816247] [2021-10-28 08:44:09,562 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:44:09,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802222038] [2021-10-28 08:44:09,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802222038] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:09,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:44:09,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 08:44:09,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834163514] [2021-10-28 08:44:09,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:44:09,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:09,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:44:09,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:44:09,571 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:44:09,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:09,627 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-10-28 08:44:09,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 08:44:09,628 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-28 08:44:09,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:09,628 INFO L225 Difference]: With dead ends: 38 [2021-10-28 08:44:09,629 INFO L226 Difference]: Without dead ends: 32 [2021-10-28 08:44:09,629 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 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 08:44:09,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-28 08:44:09,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-28 08:44:09,644 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 08:44:09,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-10-28 08:44:09,648 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2021-10-28 08:44:09,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:09,649 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-10-28 08:44:09,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:44:09,649 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-10-28 08:44:09,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 08:44:09,652 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:09,652 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:09,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:09,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:09,866 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:44:09,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:09,866 INFO L85 PathProgramCache]: Analyzing trace with hash -736656116, now seen corresponding path program 4 times [2021-10-28 08:44:09,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:09,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452895685] [2021-10-28 08:44:09,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:09,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:09,878 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:44:09,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179104298] [2021-10-28 08:44:09,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 08:44:09,879 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:09,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:09,896 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:09,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 08:44:10,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 08:44:10,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:44:10,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 08:44:10,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:10,364 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 08:44:10,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:10,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452895685] [2021-10-28 08:44:10,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:44:10,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179104298] [2021-10-28 08:44:10,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179104298] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:10,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:44:10,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-28 08:44:10,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643383192] [2021-10-28 08:44:10,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:44:10,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:10,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:44:10,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:44:10,367 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 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 08:44:10,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:10,507 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-10-28 08:44:10,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:44:10,507 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 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 08:44:10,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:10,508 INFO L225 Difference]: With dead ends: 40 [2021-10-28 08:44:10,508 INFO L226 Difference]: Without dead ends: 34 [2021-10-28 08:44:10,512 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 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 08:44:10,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-28 08:44:10,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-10-28 08:44:10,520 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 08:44:10,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-10-28 08:44:10,527 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2021-10-28 08:44:10,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:10,527 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-10-28 08:44:10,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 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 08:44:10,528 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-10-28 08:44:10,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 08:44:10,529 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:10,529 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:10,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:10,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:10,746 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:44:10,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:10,747 INFO L85 PathProgramCache]: Analyzing trace with hash -732108121, now seen corresponding path program 5 times [2021-10-28 08:44:10,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:10,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618197692] [2021-10-28 08:44:10,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:10,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:10,760 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:44:10,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731268270] [2021-10-28 08:44:10,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 08:44:10,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:10,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:10,762 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:10,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 08:44:10,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-28 08:44:10,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:44:10,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 08:44:10,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:11,152 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 08:44:11,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:11,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618197692] [2021-10-28 08:44:11,153 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:44:11,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731268270] [2021-10-28 08:44:11,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731268270] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:11,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:44:11,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 08:44:11,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034855910] [2021-10-28 08:44:11,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:44:11,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:11,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:44:11,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:44:11,159 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:44:11,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:11,235 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-10-28 08:44:11,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 08:44:11,236 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-28 08:44:11,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:11,237 INFO L225 Difference]: With dead ends: 42 [2021-10-28 08:44:11,237 INFO L226 Difference]: Without dead ends: 36 [2021-10-28 08:44:11,238 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 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 08:44:11,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-28 08:44:11,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-28 08:44:11,255 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 08:44:11,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-10-28 08:44:11,256 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2021-10-28 08:44:11,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:11,256 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-10-28 08:44:11,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:44:11,257 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-10-28 08:44:11,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-28 08:44:11,260 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:11,260 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:11,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:11,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 08:44:11,478 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:44:11,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:11,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1574368992, now seen corresponding path program 5 times [2021-10-28 08:44:11,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:11,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934440603] [2021-10-28 08:44:11,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:11,479 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:11,491 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:44:11,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [115368975] [2021-10-28 08:44:11,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 08:44:11,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:11,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:11,493 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:11,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 08:44:12,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-28 08:44:12,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:44:12,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 08:44:12,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:13,098 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 08:44:13,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:13,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934440603] [2021-10-28 08:44:13,098 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:44:13,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115368975] [2021-10-28 08:44:13,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115368975] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:13,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:44:13,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-28 08:44:13,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191346318] [2021-10-28 08:44:13,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:44:13,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:13,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:44:13,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:44:13,101 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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 08:44:13,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:13,394 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-10-28 08:44:13,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:44:13,395 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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 08:44:13,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:13,396 INFO L225 Difference]: With dead ends: 44 [2021-10-28 08:44:13,396 INFO L226 Difference]: Without dead ends: 38 [2021-10-28 08:44:13,396 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 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 08:44:13,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-28 08:44:13,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-28 08:44:13,403 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 08:44:13,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-10-28 08:44:13,403 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2021-10-28 08:44:13,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:13,403 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-10-28 08:44:13,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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 08:44:13,404 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-10-28 08:44:13,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 08:44:13,409 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:13,409 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:13,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:13,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 08:44:13,616 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:44:13,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:13,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1679669691, now seen corresponding path program 6 times [2021-10-28 08:44:13,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:13,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276331416] [2021-10-28 08:44:13,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:13,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:13,638 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:44:13,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037155723] [2021-10-28 08:44:13,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 08:44:13,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:13,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:13,643 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:13,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 08:44:13,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-28 08:44:13,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:44:13,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 08:44:13,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:14,106 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 08:44:14,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:14,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276331416] [2021-10-28 08:44:14,106 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:44:14,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037155723] [2021-10-28 08:44:14,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037155723] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:14,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:44:14,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-28 08:44:14,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045870562] [2021-10-28 08:44:14,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:44:14,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:14,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:44:14,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:44:14,111 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:44:14,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:14,199 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-10-28 08:44:14,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 08:44:14,200 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-28 08:44:14,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:14,201 INFO L225 Difference]: With dead ends: 46 [2021-10-28 08:44:14,201 INFO L226 Difference]: Without dead ends: 40 [2021-10-28 08:44:14,201 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 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 08:44:14,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-28 08:44:14,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-10-28 08:44:14,210 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 08:44:14,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-10-28 08:44:14,211 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2021-10-28 08:44:14,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:14,212 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-10-28 08:44:14,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:44:14,213 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-10-28 08:44:14,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-28 08:44:14,214 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:14,214 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:14,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:14,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 08:44:14,433 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:44:14,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:14,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1156735796, now seen corresponding path program 6 times [2021-10-28 08:44:14,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:14,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955083345] [2021-10-28 08:44:14,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:14,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:14,452 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:44:14,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2010326538] [2021-10-28 08:44:14,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 08:44:14,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:14,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:14,470 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:14,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 08:44:15,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-28 08:44:15,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:44:15,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-28 08:44:15,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:15,724 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 08:44:15,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:15,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955083345] [2021-10-28 08:44:15,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:44:15,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010326538] [2021-10-28 08:44:15,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010326538] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:15,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:44:15,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-28 08:44:15,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149302130] [2021-10-28 08:44:15,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 08:44:15,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:15,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 08:44:15,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:44:15,726 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 08:44:16,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:16,113 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-10-28 08:44:16,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 08:44:16,114 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 08:44:16,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:16,114 INFO L225 Difference]: With dead ends: 48 [2021-10-28 08:44:16,114 INFO L226 Difference]: Without dead ends: 42 [2021-10-28 08:44:16,115 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:44:16,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-28 08:44:16,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-28 08:44:16,123 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 08:44:16,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-10-28 08:44:16,123 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2021-10-28 08:44:16,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:16,123 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-10-28 08:44:16,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 08:44:16,124 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-10-28 08:44:16,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 08:44:16,124 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:16,124 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:16,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:16,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 08:44:16,325 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:44:16,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:16,326 INFO L85 PathProgramCache]: Analyzing trace with hash 2046353103, now seen corresponding path program 7 times [2021-10-28 08:44:16,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:16,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092065000] [2021-10-28 08:44:16,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:16,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:16,338 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:44:16,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907508274] [2021-10-28 08:44:16,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 08:44:16,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:16,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:16,340 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:16,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 08:44:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:16,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 08:44:16,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:16,833 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 08:44:16,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:16,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092065000] [2021-10-28 08:44:16,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:44:16,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907508274] [2021-10-28 08:44:16,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907508274] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:16,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:44:16,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-28 08:44:16,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741481715] [2021-10-28 08:44:16,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 08:44:16,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:16,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 08:44:16,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:44:16,836 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:44:16,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:16,937 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2021-10-28 08:44:16,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 08:44:16,938 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-10-28 08:44:16,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:16,938 INFO L225 Difference]: With dead ends: 50 [2021-10-28 08:44:16,938 INFO L226 Difference]: Without dead ends: 44 [2021-10-28 08:44:16,939 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-10-28 08:44:16,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-28 08:44:16,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-10-28 08:44:16,947 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 08:44:16,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-10-28 08:44:16,947 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 39 [2021-10-28 08:44:16,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:16,948 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-10-28 08:44:16,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:44:16,948 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-10-28 08:44:16,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-28 08:44:16,949 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:16,949 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:16,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:17,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 08:44:17,164 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:44:17,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:17,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1352176456, now seen corresponding path program 7 times [2021-10-28 08:44:17,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:17,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384280428] [2021-10-28 08:44:17,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:17,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:17,174 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:44:17,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375122307] [2021-10-28 08:44:17,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 08:44:17,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:17,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:17,176 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:17,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 08:44:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:18,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-28 08:44:18,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:19,363 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 08:44:19,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:19,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384280428] [2021-10-28 08:44:19,364 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:44:19,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375122307] [2021-10-28 08:44:19,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375122307] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:19,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:44:19,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-10-28 08:44:19,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008399107] [2021-10-28 08:44:19,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 08:44:19,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:19,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 08:44:19,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:44:19,366 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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 08:44:19,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:19,941 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2021-10-28 08:44:19,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 08:44:19,941 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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 08:44:19,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:19,942 INFO L225 Difference]: With dead ends: 55 [2021-10-28 08:44:19,942 INFO L226 Difference]: Without dead ends: 49 [2021-10-28 08:44:19,943 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-10-28 08:44:19,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-28 08:44:19,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2021-10-28 08:44:19,951 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 08:44:19,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-10-28 08:44:19,952 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2021-10-28 08:44:19,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:19,952 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-10-28 08:44:19,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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 08:44:19,953 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-10-28 08:44:19,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-28 08:44:19,954 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:19,954 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:19,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:20,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:20,161 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:44:20,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:20,162 INFO L85 PathProgramCache]: Analyzing trace with hash 886266339, now seen corresponding path program 8 times [2021-10-28 08:44:20,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:20,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029591540] [2021-10-28 08:44:20,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:20,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:20,179 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:44:20,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1273174220] [2021-10-28 08:44:20,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:44:20,183 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:20,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:20,184 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:20,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 08:44:20,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:44:20,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:44:20,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 08:44:20,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:20,711 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 08:44:20,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:20,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029591540] [2021-10-28 08:44:20,712 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:44:20,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273174220] [2021-10-28 08:44:20,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273174220] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:20,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:44:20,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-28 08:44:20,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430539433] [2021-10-28 08:44:20,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 08:44:20,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:20,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 08:44:20,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:44:20,715 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:44:20,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:20,858 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-10-28 08:44:20,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 08:44:20,858 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-10-28 08:44:20,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:20,859 INFO L225 Difference]: With dead ends: 54 [2021-10-28 08:44:20,859 INFO L226 Difference]: Without dead ends: 48 [2021-10-28 08:44:20,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-10-28 08:44:20,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-28 08:44:20,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-10-28 08:44:20,869 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 08:44:20,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-10-28 08:44:20,870 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 43 [2021-10-28 08:44:20,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:20,870 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-10-28 08:44:20,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:44:20,870 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-10-28 08:44:20,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 08:44:20,871 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:20,871 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:20,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:21,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:21,087 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:44:21,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:21,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1094674084, now seen corresponding path program 8 times [2021-10-28 08:44:21,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:21,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807760094] [2021-10-28 08:44:21,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:21,088 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:21,100 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:44:21,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252276763] [2021-10-28 08:44:21,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:44:21,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:21,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:21,108 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:21,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 08:44:22,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:44:22,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:44:22,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 08:44:22,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:22,796 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 08:44:22,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:22,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807760094] [2021-10-28 08:44:22,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:44:22,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252276763] [2021-10-28 08:44:22,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252276763] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:22,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:44:22,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-28 08:44:22,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648804667] [2021-10-28 08:44:22,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 08:44:22,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:22,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 08:44:22,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:44:22,800 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 08:44:23,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:23,169 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-10-28 08:44:23,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 08:44:23,169 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 08:44:23,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:23,170 INFO L225 Difference]: With dead ends: 56 [2021-10-28 08:44:23,170 INFO L226 Difference]: Without dead ends: 50 [2021-10-28 08:44:23,171 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 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 08:44:23,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-28 08:44:23,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-10-28 08:44:23,179 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 08:44:23,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-10-28 08:44:23,180 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2021-10-28 08:44:23,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:23,180 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-10-28 08:44:23,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 08:44:23,181 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-10-28 08:44:23,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 08:44:23,181 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:23,181 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:23,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:23,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:23,389 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:44:23,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:23,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1189991689, now seen corresponding path program 9 times [2021-10-28 08:44:23,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:23,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357146237] [2021-10-28 08:44:23,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:23,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:23,401 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:44:23,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557105532] [2021-10-28 08:44:23,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:44:23,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:23,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:23,403 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:23,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 08:44:24,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-28 08:44:24,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:44:24,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 08:44:24,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:24,442 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 08:44:24,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:24,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357146237] [2021-10-28 08:44:24,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:44:24,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557105532] [2021-10-28 08:44:24,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557105532] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:24,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:44:24,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-28 08:44:24,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417668311] [2021-10-28 08:44:24,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 08:44:24,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:24,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 08:44:24,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:44:24,445 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:44:24,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:24,599 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-10-28 08:44:24,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-28 08:44:24,600 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-10-28 08:44:24,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:24,600 INFO L225 Difference]: With dead ends: 58 [2021-10-28 08:44:24,600 INFO L226 Difference]: Without dead ends: 52 [2021-10-28 08:44:24,601 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 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 08:44:24,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-28 08:44:24,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-10-28 08:44:24,609 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 08:44:24,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-10-28 08:44:24,610 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2021-10-28 08:44:24,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:24,610 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-10-28 08:44:24,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:44:24,611 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-10-28 08:44:24,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-28 08:44:24,611 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:24,612 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:24,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:24,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:24,821 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:44:24,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:24,821 INFO L85 PathProgramCache]: Analyzing trace with hash 781153648, now seen corresponding path program 9 times [2021-10-28 08:44:24,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:24,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621726768] [2021-10-28 08:44:24,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:24,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:24,834 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:44:24,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [619605876] [2021-10-28 08:44:24,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:44:24,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:24,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:24,836 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:24,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 08:44:26,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-28 08:44:26,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:44:26,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-28 08:44:26,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:27,518 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 08:44:27,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:27,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621726768] [2021-10-28 08:44:27,518 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:44:27,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619605876] [2021-10-28 08:44:27,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619605876] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:27,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:44:27,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-10-28 08:44:27,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808285053] [2021-10-28 08:44:27,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 08:44:27,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:27,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 08:44:27,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-10-28 08:44:27,530 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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 08:44:27,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:27,929 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2021-10-28 08:44:27,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 08:44:27,930 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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 08:44:27,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:27,931 INFO L225 Difference]: With dead ends: 60 [2021-10-28 08:44:27,931 INFO L226 Difference]: Without dead ends: 54 [2021-10-28 08:44:27,931 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:44:27,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-28 08:44:27,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-28 08:44:27,938 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 08:44:27,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-10-28 08:44:27,939 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 49 [2021-10-28 08:44:27,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:27,939 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-10-28 08:44:27,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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 08:44:27,940 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-10-28 08:44:27,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 08:44:27,940 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:27,941 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:27,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-10-28 08:44:28,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-28 08:44:28,149 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:44:28,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:28,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1889161739, now seen corresponding path program 10 times [2021-10-28 08:44:28,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:28,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98463221] [2021-10-28 08:44:28,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:28,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:28,160 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:44:28,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760692371] [2021-10-28 08:44:28,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 08:44:28,161 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:28,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:28,164 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:28,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 08:44:29,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 08:44:29,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-28 08:44:29,356 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 08:44:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:44:29,872 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 08:44:29,872 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 08:44:29,873 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 08:44:29,875 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 08:44:29,875 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 08:44:29,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:30,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 08:44:30,087 INFO L731 BasicCegarLoop]: Path program histogram: [10, 9, 3, 1, 1] [2021-10-28 08:44:30,090 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:44:30,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:44:30 BoogieIcfgContainer [2021-10-28 08:44:30,220 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:44:30,221 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:44:30,221 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:44:30,222 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:44:30,222 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:44:01" (3/4) ... [2021-10-28 08:44:30,224 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 08:44:30,320 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 08:44:30,320 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:44:30,324 INFO L168 Benchmark]: Toolchain (without parser) took 29834.72 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 65.8 MB in the beginning and 71.0 MB in the end (delta: -5.2 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. [2021-10-28 08:44:30,324 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 98.6 MB. Free memory is still 53.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:44:30,324 INFO L168 Benchmark]: CACSL2BoogieTranslator took 330.69 ms. Allocated memory is still 98.6 MB. Free memory was 65.6 MB in the beginning and 74.4 MB in the end (delta: -8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 08:44:30,325 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.37 ms. Allocated memory is still 98.6 MB. Free memory was 74.4 MB in the beginning and 72.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:44:30,325 INFO L168 Benchmark]: Boogie Preprocessor took 47.83 ms. Allocated memory is still 98.6 MB. Free memory was 72.8 MB in the beginning and 71.9 MB in the end (delta: 919.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:44:30,325 INFO L168 Benchmark]: RCFGBuilder took 464.88 ms. Allocated memory is still 98.6 MB. Free memory was 71.5 MB in the beginning and 62.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 08:44:30,326 INFO L168 Benchmark]: TraceAbstraction took 28831.18 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 61.6 MB in the beginning and 75.2 MB in the end (delta: -13.6 MB). Peak memory consumption was 58.9 MB. Max. memory is 16.1 GB. [2021-10-28 08:44:30,326 INFO L168 Benchmark]: Witness Printer took 98.91 ms. Allocated memory is still 119.5 MB. Free memory was 75.2 MB in the beginning and 71.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 08:44:30,328 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 98.6 MB. Free memory is still 53.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 330.69 ms. Allocated memory is still 98.6 MB. Free memory was 65.6 MB in the beginning and 74.4 MB in the end (delta: -8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.37 ms. Allocated memory is still 98.6 MB. Free memory was 74.4 MB in the beginning and 72.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.83 ms. Allocated memory is still 98.6 MB. Free memory was 72.8 MB in the beginning and 71.9 MB in the end (delta: 919.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 464.88 ms. Allocated memory is still 98.6 MB. Free memory was 71.5 MB in the beginning and 62.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 28831.18 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 61.6 MB in the beginning and 75.2 MB in the end (delta: -13.6 MB). Peak memory consumption was 58.9 MB. Max. memory is 16.1 GB. * Witness Printer took 98.91 ms. Allocated memory is still 119.5 MB. Free memory was 75.2 MB in the beginning and 71.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s 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() [L7] COND FALSE !(!cond) VAL [counter=0] [L24] y = 0 [L25] x = 0 [L26] c = 0 VAL [counter=0] [L28] EXPR counter++ VAL [counter=1] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=1] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [counter=1] [L28] EXPR counter++ VAL [counter=2] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=2] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [counter=2] [L28] EXPR counter++ VAL [counter=3] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=3] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [counter=3] [L28] EXPR counter++ VAL [counter=4] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=4] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [counter=4] [L28] EXPR counter++ VAL [counter=5] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=5] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [counter=5] [L28] EXPR counter++ VAL [counter=6] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=6] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [counter=6] [L28] EXPR counter++ VAL [counter=7] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=7] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [counter=7] [L28] EXPR counter++ VAL [counter=8] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=8] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [counter=8] [L28] EXPR counter++ VAL [counter=9] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=9] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [counter=9] [L28] EXPR counter++ VAL [counter=10] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=10] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [counter=10] [L28] EXPR counter++ VAL [counter=11] [L28] COND FALSE !(counter++<10) [L10] COND FALSE !(!(cond)) VAL [counter=11] [L10] COND TRUE !(cond) VAL [counter=11] [L12] reach_error() VAL [counter=11] - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 28.6s, OverallIterations: 24, TraceHistogramMax: 11, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 387 SDtfs, 166 SDslu, 1791 SDs, 0 SdLazy, 1792 SolverSat, 65 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 685 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=23, InterpolantAutomatonStates: 246, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 23 MinimizatonAttempts, 30 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 7.9s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 691 NumberOfCodeBlocks, 675 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 617 ConstructedInterpolants, 0 QuantifiedInterpolants, 3453 SizeOfPredicates, 100 NumberOfNonLiveVariables, 2994 ConjunctsInSsa, 428 ConjunctsInUnsatCore, 23 InterpolantComputations, 2 PerfectInterpolantSequences, 20/1264 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 08:44:30,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1850dac2-2056-4f92-aa0b-6d7f261ebf9b/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...