./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound10.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_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/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_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/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_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/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 879a640f466eee273c1bfb9ec38819f0b05c8e28dd65a68aba774d943b257ad3 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:24:13,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:24:13,445 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:24:13,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:24:13,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:24:13,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:24:13,500 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:24:13,507 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:24:13,509 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:24:13,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:24:13,513 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:24:13,517 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:24:13,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:24:13,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:24:13,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:24:13,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:24:13,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:24:13,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:24:13,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:24:13,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:24:13,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:24:13,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:24:13,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:24:13,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:24:13,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:24:13,556 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:24:13,556 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:24:13,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:24:13,559 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:24:13,561 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:24:13,562 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:24:13,563 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:24:13,565 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:24:13,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:24:13,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:24:13,569 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:24:13,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:24:13,570 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:24:13,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:24:13,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:24:13,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:24:13,576 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 09:24:13,611 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:24:13,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:24:13,616 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:24:13,616 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:24:13,624 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:24:13,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:24:13,624 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:24:13,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:24:13,625 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:24:13,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:24:13,626 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:24:13,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:24:13,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 09:24:13,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:24:13,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 09:24:13,628 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:24:13,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 09:24:13,628 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:24:13,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 09:24:13,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:24:13,629 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:24:13,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:24:13,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:24:13,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:24:13,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:24:13,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 09:24:13,630 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:24:13,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:24:13,631 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 09:24:13,632 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 09:24:13,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 09:24:13,633 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:24:13,633 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_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 879a640f466eee273c1bfb9ec38819f0b05c8e28dd65a68aba774d943b257ad3 [2021-10-28 09:24:13,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:24:13,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:24:13,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:24:13,924 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:24:13,924 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:24:13,925 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound10.c [2021-10-28 09:24:14,020 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/data/cd625b4e7/bf89892df43c40f38a2b2d0588c4dc31/FLAGbc5fda992 [2021-10-28 09:24:14,479 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:24:14,479 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound10.c [2021-10-28 09:24:14,486 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/data/cd625b4e7/bf89892df43c40f38a2b2d0588c4dc31/FLAGbc5fda992 [2021-10-28 09:24:14,839 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/data/cd625b4e7/bf89892df43c40f38a2b2d0588c4dc31 [2021-10-28 09:24:14,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:24:14,843 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 09:24:14,846 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:24:14,847 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:24:14,850 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:24:14,851 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:24:14" (1/1) ... [2021-10-28 09:24:14,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28e0a96a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:14, skipping insertion in model container [2021-10-28 09:24:14,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:24:14" (1/1) ... [2021-10-28 09:24:14,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:24:14,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:24:15,055 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_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound10.c[524,537] [2021-10-28 09:24:15,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:24:15,081 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:24:15,093 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_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound10.c[524,537] [2021-10-28 09:24:15,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:24:15,117 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:24:15,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:15 WrapperNode [2021-10-28 09:24:15,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:24:15,119 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 09:24:15,119 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 09:24:15,119 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 09:24:15,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:15" (1/1) ... [2021-10-28 09:24:15,134 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:15" (1/1) ... [2021-10-28 09:24:15,157 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 09:24:15,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:24:15,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:24:15,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:24:15,166 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:15" (1/1) ... [2021-10-28 09:24:15,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:15" (1/1) ... [2021-10-28 09:24:15,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:15" (1/1) ... [2021-10-28 09:24:15,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:15" (1/1) ... [2021-10-28 09:24:15,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:15" (1/1) ... [2021-10-28 09:24:15,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:15" (1/1) ... [2021-10-28 09:24:15,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:15" (1/1) ... [2021-10-28 09:24:15,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:24:15,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:24:15,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:24:15,184 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:24:15,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:15" (1/1) ... [2021-10-28 09:24:15,194 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:24:15,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:15,234 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:24:15,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:24:15,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:24:15,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:24:15,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:24:15,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:24:15,516 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:24:15,517 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-28 09:24:15,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:24:15 BoogieIcfgContainer [2021-10-28 09:24:15,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:24:15,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:24:15,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:24:15,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:24:15,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:24:14" (1/3) ... [2021-10-28 09:24:15,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49546ee1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:24:15, skipping insertion in model container [2021-10-28 09:24:15,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:15" (2/3) ... [2021-10-28 09:24:15,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49546ee1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:24:15, skipping insertion in model container [2021-10-28 09:24:15,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:24:15" (3/3) ... [2021-10-28 09:24:15,527 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_valuebound10.c [2021-10-28 09:24:15,532 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:24:15,533 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-28 09:24:15,582 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:24:15,589 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 09:24:15,589 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-28 09:24:15,604 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 24 states have (on average 1.625) internal successors, (39), 27 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 09:24:15,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 09:24:15,609 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:15,610 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:15,611 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:24:15,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:15,616 INFO L85 PathProgramCache]: Analyzing trace with hash 330581779, now seen corresponding path program 1 times [2021-10-28 09:24:15,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:15,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087077403] [2021-10-28 09:24:15,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:15,627 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:15,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:15,863 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 09:24:15,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:15,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087077403] [2021-10-28 09:24:15,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087077403] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:24:15,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:24:15,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 09:24:15,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527745133] [2021-10-28 09:24:15,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 09:24:15,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:15,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 09:24:15,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 09:24:15,904 INFO L87 Difference]: Start difference. First operand has 28 states, 24 states have (on average 1.625) internal successors, (39), 27 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:24:15,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:15,926 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2021-10-28 09:24:15,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 09:24:15,927 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-28 09:24:15,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:15,940 INFO L225 Difference]: With dead ends: 53 [2021-10-28 09:24:15,940 INFO L226 Difference]: Without dead ends: 24 [2021-10-28 09:24:15,945 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 09:24:15,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-28 09:24:15,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-28 09:24:15,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 23 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 09:24:15,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-10-28 09:24:15,982 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 11 [2021-10-28 09:24:15,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:15,984 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-10-28 09:24:15,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:24:15,984 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-10-28 09:24:15,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 09:24:15,986 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:15,986 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:15,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:24:15,987 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 09:24:15,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:15,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1507472743, now seen corresponding path program 1 times [2021-10-28 09:24:15,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:15,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555261985] [2021-10-28 09:24:15,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:15,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:16,032 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:24:16,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081754716] [2021-10-28 09:24:16,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:16,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:16,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:16,035 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:16,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:24:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:16,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 09:24:16,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:16,374 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 09:24:16,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:16,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555261985] [2021-10-28 09:24:16,375 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:24:16,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081754716] [2021-10-28 09:24:16,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081754716] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:24:16,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:24:16,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:24:16,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832135740] [2021-10-28 09:24:16,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:24:16,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:16,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:24:16,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:24:16,379 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:24:16,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:16,488 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-10-28 09:24:16,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:24:16,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-28 09:24:16,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:16,492 INFO L225 Difference]: With dead ends: 41 [2021-10-28 09:24:16,493 INFO L226 Difference]: Without dead ends: 39 [2021-10-28 09:24:16,495 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 09:24:16,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-28 09:24:16,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2021-10-28 09:24:16,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:24:16,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-10-28 09:24:16,506 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 11 [2021-10-28 09:24:16,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:16,507 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-10-28 09:24:16,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:24:16,508 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-10-28 09:24:16,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 09:24:16,509 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:16,509 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:16,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:16,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-28 09:24:16,734 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:24:16,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:16,735 INFO L85 PathProgramCache]: Analyzing trace with hash -937517175, now seen corresponding path program 1 times [2021-10-28 09:24:16,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:16,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234257978] [2021-10-28 09:24:16,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:16,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:16,752 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:24:16,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532942944] [2021-10-28 09:24:16,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:16,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:16,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:16,754 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:16,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 09:24:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:16,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 09:24:16,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:17,860 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 09:24:17,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:17,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234257978] [2021-10-28 09:24:17,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:24:17,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532942944] [2021-10-28 09:24:17,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532942944] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:24:17,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:24:17,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-28 09:24:17,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258631146] [2021-10-28 09:24:17,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 09:24:17,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:17,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 09:24:17,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:24:17,870 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 13 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:24:24,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:24,270 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-10-28 09:24:24,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 09:24:24,282 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-28 09:24:24,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:24,283 INFO L225 Difference]: With dead ends: 39 [2021-10-28 09:24:24,283 INFO L226 Difference]: Without dead ends: 37 [2021-10-28 09:24:24,284 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-10-28 09:24:24,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-28 09:24:24,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2021-10-28 09:24:24,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 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 09:24:24,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-10-28 09:24:24,290 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 14 [2021-10-28 09:24:24,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:24,290 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-10-28 09:24:24,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:24:24,291 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-10-28 09:24:24,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 09:24:24,292 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:24,292 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:24,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:24,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:24,506 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:24:24,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:24,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1003041614, now seen corresponding path program 1 times [2021-10-28 09:24:24,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:24,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268004334] [2021-10-28 09:24:24,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:24,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:24,529 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:24:24,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964112356] [2021-10-28 09:24:24,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:24,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:24,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:24,536 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:24,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 09:24:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:24,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-28 09:24:24,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:26,077 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 09:24:26,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:26,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268004334] [2021-10-28 09:24:26,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:24:26,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964112356] [2021-10-28 09:24:26,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964112356] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:26,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:24:26,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-28 09:24:26,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366086254] [2021-10-28 09:24:26,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:24:26,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:26,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:24:26,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:24:26,081 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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 09:24:26,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:26,680 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2021-10-28 09:24:26,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:24:26,682 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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 09:24:26,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:26,683 INFO L225 Difference]: With dead ends: 53 [2021-10-28 09:24:26,683 INFO L226 Difference]: Without dead ends: 51 [2021-10-28 09:24:26,684 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-10-28 09:24:26,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-28 09:24:26,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2021-10-28 09:24:26,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:24:26,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-10-28 09:24:26,690 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 15 [2021-10-28 09:24:26,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:26,690 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-10-28 09:24:26,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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 09:24:26,690 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-10-28 09:24:26,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 09:24:26,691 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:26,691 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:26,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:26,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:26,892 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:24:26,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:26,892 INFO L85 PathProgramCache]: Analyzing trace with hash 989284300, now seen corresponding path program 1 times [2021-10-28 09:24:26,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:26,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539850584] [2021-10-28 09:24:26,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:26,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:26,908 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:24:26,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318705317] [2021-10-28 09:24:26,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:26,909 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:26,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:26,910 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:26,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 09:24:27,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:27,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 09:24:27,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:27,160 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 09:24:27,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:27,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539850584] [2021-10-28 09:24:27,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:24:27,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318705317] [2021-10-28 09:24:27,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318705317] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:24:27,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:24:27,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 09:24:27,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388882357] [2021-10-28 09:24:27,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:24:27,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:27,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:24:27,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:24:27,180 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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 09:24:27,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:27,329 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2021-10-28 09:24:27,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:24:27,330 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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 09:24:27,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:27,331 INFO L225 Difference]: With dead ends: 48 [2021-10-28 09:24:27,331 INFO L226 Difference]: Without dead ends: 42 [2021-10-28 09:24:27,331 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:24:27,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-28 09:24:27,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2021-10-28 09:24:27,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 36 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 09:24:27,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-10-28 09:24:27,340 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 16 [2021-10-28 09:24:27,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:27,340 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-10-28 09:24:27,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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 09:24:27,341 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-10-28 09:24:27,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 09:24:27,342 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:27,342 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:27,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:27,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:27,562 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:24:27,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:27,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1032048289, now seen corresponding path program 1 times [2021-10-28 09:24:27,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:27,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045868768] [2021-10-28 09:24:27,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:27,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:27,579 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:24:27,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876768838] [2021-10-28 09:24:27,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:27,579 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:27,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:27,582 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:27,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 09:24:27,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:27,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-28 09:24:27,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:28,016 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 09:24:28,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:28,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045868768] [2021-10-28 09:24:28,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:24:28,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876768838] [2021-10-28 09:24:28,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876768838] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:28,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:24:28,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 09:24:28,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081359817] [2021-10-28 09:24:28,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:24:28,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:28,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:24:28,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:24:28,019 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 09:24:28,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:28,498 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2021-10-28 09:24:28,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:24:28,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 09:24:28,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:28,499 INFO L225 Difference]: With dead ends: 67 [2021-10-28 09:24:28,499 INFO L226 Difference]: Without dead ends: 51 [2021-10-28 09:24:28,500 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:24:28,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-28 09:24:28,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2021-10-28 09:24:28,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 43 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:24:28,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-10-28 09:24:28,508 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 16 [2021-10-28 09:24:28,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:28,508 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-10-28 09:24:28,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 09:24:28,509 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2021-10-28 09:24:28,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:24:28,510 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:28,510 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:28,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:28,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-28 09:24:28,738 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:24:28,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:28,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1931404169, now seen corresponding path program 1 times [2021-10-28 09:24:28,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:28,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874167406] [2021-10-28 09:24:28,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:28,739 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:28,753 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:24:28,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [849037626] [2021-10-28 09:24:28,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:28,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:28,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:28,755 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:28,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 09:24:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:28,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 09:24:28,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:29,081 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 09:24:29,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:29,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874167406] [2021-10-28 09:24:29,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:24:29,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849037626] [2021-10-28 09:24:29,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849037626] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:29,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:24:29,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-28 09:24:29,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287918471] [2021-10-28 09:24:29,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:24:29,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:29,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:24:29,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:24:29,088 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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 09:24:29,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:29,348 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2021-10-28 09:24:29,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:24:29,349 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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 09:24:29,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:29,349 INFO L225 Difference]: With dead ends: 76 [2021-10-28 09:24:29,349 INFO L226 Difference]: Without dead ends: 60 [2021-10-28 09:24:29,350 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 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 09:24:29,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-28 09:24:29,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2021-10-28 09:24:29,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 49 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:24:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2021-10-28 09:24:29,358 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 17 [2021-10-28 09:24:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:29,358 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2021-10-28 09:24:29,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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 09:24:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2021-10-28 09:24:29,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:24:29,360 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:29,360 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:29,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:29,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:29,582 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 09:24:29,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:29,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1931463751, now seen corresponding path program 1 times [2021-10-28 09:24:29,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:29,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259569151] [2021-10-28 09:24:29,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:29,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:29,594 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:24:29,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205323772] [2021-10-28 09:24:29,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:29,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:29,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:29,596 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:29,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 09:24:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:29,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 09:24:29,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:29,930 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 09:24:29,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:29,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259569151] [2021-10-28 09:24:29,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:24:29,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205323772] [2021-10-28 09:24:29,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205323772] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:29,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:24:29,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-28 09:24:29,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325144566] [2021-10-28 09:24:29,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:24:29,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:29,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:24:29,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:24:29,933 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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 09:24:30,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:30,146 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2021-10-28 09:24:30,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:24:30,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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 09:24:30,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:30,147 INFO L225 Difference]: With dead ends: 67 [2021-10-28 09:24:30,147 INFO L226 Difference]: Without dead ends: 65 [2021-10-28 09:24:30,147 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 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 09:24:30,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-28 09:24:30,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 52. [2021-10-28 09:24:30,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 51 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:24:30,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2021-10-28 09:24:30,156 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 17 [2021-10-28 09:24:30,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:30,156 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2021-10-28 09:24:30,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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 09:24:30,156 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2021-10-28 09:24:30,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 09:24:30,157 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:30,158 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:30,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:30,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:30,378 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:24:30,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:30,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1530166964, now seen corresponding path program 1 times [2021-10-28 09:24:30,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:30,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670264385] [2021-10-28 09:24:30,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:30,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:30,393 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:24:30,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1576720298] [2021-10-28 09:24:30,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:30,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:30,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:30,402 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:30,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 09:24:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:30,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 09:24:30,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:30,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:30,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:30,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670264385] [2021-10-28 09:24:30,766 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:24:30,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576720298] [2021-10-28 09:24:30,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576720298] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:24:30,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:24:30,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:24:30,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009481469] [2021-10-28 09:24:30,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:24:30,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:30,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:24:30,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:24:30,769 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:24:30,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:30,877 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2021-10-28 09:24:30,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:24:30,878 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-28 09:24:30,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:30,879 INFO L225 Difference]: With dead ends: 70 [2021-10-28 09:24:30,879 INFO L226 Difference]: Without dead ends: 60 [2021-10-28 09:24:30,879 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:24:30,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-28 09:24:30,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2021-10-28 09:24:30,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 57 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:24:30,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2021-10-28 09:24:30,889 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 18 [2021-10-28 09:24:30,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:30,889 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2021-10-28 09:24:30,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:24:30,890 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2021-10-28 09:24:30,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:24:30,891 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:30,891 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:30,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:31,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-28 09:24:31,102 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:24:31,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:31,102 INFO L85 PathProgramCache]: Analyzing trace with hash 191838595, now seen corresponding path program 2 times [2021-10-28 09:24:31,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:31,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025849432] [2021-10-28 09:24:31,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:31,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:31,116 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:24:31,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345771395] [2021-10-28 09:24:31,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:24:31,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:31,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:31,118 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:31,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 09:24:31,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:24:31,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:24:31,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-28 09:24:31,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:43,657 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 09:24:43,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:43,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025849432] [2021-10-28 09:24:43,658 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:24:43,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345771395] [2021-10-28 09:24:43,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345771395] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:43,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:24:43,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-28 09:24:43,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330367261] [2021-10-28 09:24:43,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:24:43,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:43,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:24:43,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:24:43,661 INFO L87 Difference]: Start difference. First operand 58 states and 75 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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 09:24:44,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:44,429 INFO L93 Difference]: Finished difference Result 73 states and 96 transitions. [2021-10-28 09:24:44,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 09:24:44,430 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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 09:24:44,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:44,431 INFO L225 Difference]: With dead ends: 73 [2021-10-28 09:24:44,431 INFO L226 Difference]: Without dead ends: 71 [2021-10-28 09:24:44,432 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-10-28 09:24:44,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-28 09:24:44,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2021-10-28 09:24:44,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 61 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:24:44,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2021-10-28 09:24:44,442 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 19 [2021-10-28 09:24:44,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:44,443 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2021-10-28 09:24:44,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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 09:24:44,443 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2021-10-28 09:24:44,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:24:44,444 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:44,444 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:44,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:44,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:44,670 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:24:44,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:44,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1915371903, now seen corresponding path program 1 times [2021-10-28 09:24:44,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:44,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194398869] [2021-10-28 09:24:44,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:44,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:44,684 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:24:44,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887763316] [2021-10-28 09:24:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:44,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:44,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:44,689 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:44,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 09:24:44,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:44,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 09:24:44,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:45,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:45,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194398869] [2021-10-28 09:24:45,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:24:45,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887763316] [2021-10-28 09:24:45,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887763316] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:24:45,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:24:45,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 09:24:45,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878877997] [2021-10-28 09:24:45,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:24:45,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:45,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:24:45,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:24:45,099 INFO L87 Difference]: Start difference. First operand 62 states and 80 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 09:24:50,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:50,658 INFO L93 Difference]: Finished difference Result 81 states and 102 transitions. [2021-10-28 09:24:50,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:24:50,658 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 09:24:50,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:50,659 INFO L225 Difference]: With dead ends: 81 [2021-10-28 09:24:50,659 INFO L226 Difference]: Without dead ends: 77 [2021-10-28 09:24:50,660 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:24:50,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-28 09:24:50,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2021-10-28 09:24:50,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 59 states have (on average 1.3389830508474576) internal successors, (79), 61 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:24:50,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2021-10-28 09:24:50,670 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 19 [2021-10-28 09:24:50,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:50,670 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2021-10-28 09:24:50,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 09:24:50,671 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2021-10-28 09:24:50,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 09:24:50,672 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:50,672 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:50,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:50,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-28 09:24:50,878 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:24:50,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:50,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1654558476, now seen corresponding path program 1 times [2021-10-28 09:24:50,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:50,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651386275] [2021-10-28 09:24:50,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:50,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:50,892 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:24:50,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1283181647] [2021-10-28 09:24:50,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:50,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:50,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:50,894 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:50,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 09:24:51,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:51,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-28 09:24:51,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:52,823 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 09:24:52,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:52,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651386275] [2021-10-28 09:24:52,824 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:24:52,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283181647] [2021-10-28 09:24:52,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283181647] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:52,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:24:52,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-28 09:24:52,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043825412] [2021-10-28 09:24:52,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 09:24:52,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:52,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 09:24:52,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:24:52,825 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:24:53,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:53,440 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2021-10-28 09:24:53,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:24:53,440 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-28 09:24:53,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:53,441 INFO L225 Difference]: With dead ends: 74 [2021-10-28 09:24:53,441 INFO L226 Difference]: Without dead ends: 72 [2021-10-28 09:24:53,442 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-10-28 09:24:53,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-28 09:24:53,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2021-10-28 09:24:53,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.35) internal successors, (81), 62 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:24:53,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2021-10-28 09:24:53,451 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 20 [2021-10-28 09:24:53,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:53,452 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2021-10-28 09:24:53,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:24:53,452 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2021-10-28 09:24:53,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 09:24:53,453 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:53,453 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:53,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:53,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 09:24:53,674 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:24:53,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:53,674 INFO L85 PathProgramCache]: Analyzing trace with hash 754316118, now seen corresponding path program 2 times [2021-10-28 09:24:53,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:53,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665166805] [2021-10-28 09:24:53,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:53,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:53,690 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:24:53,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538725415] [2021-10-28 09:24:53,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:24:53,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:53,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:53,701 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:53,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 09:24:53,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:24:53,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:24:53,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-28 09:24:53,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:25:12,086 WARN L207 SmtUtils]: Spent 6.08 s on a formula simplification that was a NOOP. DAG size: 34 [2021-10-28 09:25:37,898 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 09:25:37,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:25:37,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665166805] [2021-10-28 09:25:37,899 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:25:37,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538725415] [2021-10-28 09:25:37,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538725415] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:25:37,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:25:37,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-28 09:25:37,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806054559] [2021-10-28 09:25:37,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:25:37,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:25:37,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:25:37,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:25:37,902 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:25:54,143 WARN L207 SmtUtils]: Spent 12.19 s on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-10-28 09:25:59,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:25:59,728 INFO L93 Difference]: Finished difference Result 73 states and 94 transitions. [2021-10-28 09:25:59,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:25:59,729 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-28 09:25:59,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:25:59,730 INFO L225 Difference]: With dead ends: 73 [2021-10-28 09:25:59,730 INFO L226 Difference]: Without dead ends: 71 [2021-10-28 09:25:59,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-10-28 09:25:59,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-28 09:25:59,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2021-10-28 09:25:59,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.35) internal successors, (81), 62 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:25:59,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2021-10-28 09:25:59,740 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 20 [2021-10-28 09:25:59,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:25:59,740 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2021-10-28 09:25:59,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:25:59,740 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2021-10-28 09:25:59,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 09:25:59,742 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:25:59,742 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:25:59,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-10-28 09:25:59,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:25:59,957 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:25:59,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:25:59,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1210343271, now seen corresponding path program 1 times [2021-10-28 09:25:59,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:25:59,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49702375] [2021-10-28 09:25:59,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:25:59,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:25:59,969 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:25:59,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [185067979] [2021-10-28 09:25:59,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:25:59,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:25:59,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:25:59,971 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:25:59,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 09:26:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:26:00,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 09:26:00,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:26:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:00,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:26:00,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49702375] [2021-10-28 09:26:00,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:26:00,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185067979] [2021-10-28 09:26:00,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185067979] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:26:00,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:26:00,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 09:26:00,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812057672] [2021-10-28 09:26:00,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:26:00,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:26:00,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:26:00,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:26:00,503 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:09,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:26:09,034 INFO L93 Difference]: Finished difference Result 93 states and 117 transitions. [2021-10-28 09:26:09,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:26:09,034 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-28 09:26:09,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:26:09,035 INFO L225 Difference]: With dead ends: 93 [2021-10-28 09:26:09,035 INFO L226 Difference]: Without dead ends: 91 [2021-10-28 09:26:09,035 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:26:09,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-28 09:26:09,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2021-10-28 09:26:09,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.35) internal successors, (81), 62 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:09,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2021-10-28 09:26:09,045 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 20 [2021-10-28 09:26:09,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:26:09,045 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2021-10-28 09:26:09,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:09,046 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2021-10-28 09:26:09,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 09:26:09,047 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:26:09,047 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:26:09,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-28 09:26:09,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:26:09,258 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:26:09,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:09,258 INFO L85 PathProgramCache]: Analyzing trace with hash 564664091, now seen corresponding path program 1 times [2021-10-28 09:26:09,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:09,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144733623] [2021-10-28 09:26:09,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:09,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:09,268 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:26:09,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279111656] [2021-10-28 09:26:09,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:09,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:26:09,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:26:09,270 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:26:09,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 09:26:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:26:09,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-28 09:26:09,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:26:10,578 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 09:26:10,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:26:10,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144733623] [2021-10-28 09:26:10,578 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:26:10,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279111656] [2021-10-28 09:26:10,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279111656] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:26:10,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:26:10,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-28 09:26:10,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133779945] [2021-10-28 09:26:10,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 09:26:10,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:26:10,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 09:26:10,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:26:10,580 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:18,798 WARN L207 SmtUtils]: Spent 6.97 s on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-10-28 09:26:37,159 WARN L207 SmtUtils]: Spent 18.30 s on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-10-28 09:26:49,729 WARN L207 SmtUtils]: Spent 12.46 s on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-10-28 09:27:13,807 WARN L207 SmtUtils]: Spent 18.37 s on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-10-28 09:27:14,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:27:14,589 INFO L93 Difference]: Finished difference Result 82 states and 103 transitions. [2021-10-28 09:27:14,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 09:27:14,589 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-28 09:27:14,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:27:14,590 INFO L225 Difference]: With dead ends: 82 [2021-10-28 09:27:14,590 INFO L226 Difference]: Without dead ends: 72 [2021-10-28 09:27:14,590 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 57.7s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-10-28 09:27:14,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-28 09:27:14,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2021-10-28 09:27:14,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 62 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:27:14,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2021-10-28 09:27:14,599 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 20 [2021-10-28 09:27:14,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:27:14,599 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2021-10-28 09:27:14,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:27:14,599 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2021-10-28 09:27:14,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:27:14,600 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:27:14,600 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:27:14,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:14,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:27:14,806 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:27:14,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:27:14,806 INFO L85 PathProgramCache]: Analyzing trace with hash -245616514, now seen corresponding path program 1 times [2021-10-28 09:27:14,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:27:14,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147525667] [2021-10-28 09:27:14,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:27:14,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:27:14,817 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:27:14,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449079679] [2021-10-28 09:27:14,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:27:14,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:27:14,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:27:14,818 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:27:14,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 09:27:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:27:15,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-28 09:27:15,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:27:16,148 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 09:27:16,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:27:16,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147525667] [2021-10-28 09:27:16,149 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:27:16,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449079679] [2021-10-28 09:27:16,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449079679] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:27:16,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:27:16,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-28 09:27:16,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710889275] [2021-10-28 09:27:16,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:27:16,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:27:16,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:27:16,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:27:16,151 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 09:27:17,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:27:17,216 INFO L93 Difference]: Finished difference Result 82 states and 103 transitions. [2021-10-28 09:27:17,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:27:17,216 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 09:27:17,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:27:17,217 INFO L225 Difference]: With dead ends: 82 [2021-10-28 09:27:17,217 INFO L226 Difference]: Without dead ends: 80 [2021-10-28 09:27:17,218 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:27:17,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-28 09:27:17,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2021-10-28 09:27:17,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 65 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:27:17,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2021-10-28 09:27:17,224 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 21 [2021-10-28 09:27:17,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:27:17,225 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2021-10-28 09:27:17,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 09:27:17,225 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2021-10-28 09:27:17,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:27:17,226 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:27:17,226 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:27:17,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:17,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 09:27:17,436 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:27:17,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:27:17,436 INFO L85 PathProgramCache]: Analyzing trace with hash -245556932, now seen corresponding path program 1 times [2021-10-28 09:27:17,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:27:17,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697531575] [2021-10-28 09:27:17,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:27:17,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:27:17,448 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:27:17,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7317409] [2021-10-28 09:27:17,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:27:17,449 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:27:17,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:27:17,455 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:27:17,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 09:27:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:27:17,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-28 09:27:17,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:27:20,862 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 09:27:20,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:27:20,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697531575] [2021-10-28 09:27:20,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:27:20,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7317409] [2021-10-28 09:27:20,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7317409] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:27:20,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:27:20,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-28 09:27:20,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168183614] [2021-10-28 09:27:20,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 09:27:20,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:27:20,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 09:27:20,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:27:20,864 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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 09:27:26,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:27:26,935 INFO L93 Difference]: Finished difference Result 86 states and 107 transitions. [2021-10-28 09:27:26,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 09:27:26,935 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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 09:27:26,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:27:26,936 INFO L225 Difference]: With dead ends: 86 [2021-10-28 09:27:26,936 INFO L226 Difference]: Without dead ends: 84 [2021-10-28 09:27:26,937 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-10-28 09:27:26,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-28 09:27:26,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2021-10-28 09:27:26,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 65 states have (on average 1.323076923076923) internal successors, (86), 67 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:27:26,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2021-10-28 09:27:26,946 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 21 [2021-10-28 09:27:26,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:27:26,946 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2021-10-28 09:27:26,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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 09:27:26,946 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2021-10-28 09:27:26,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:27:26,947 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:27:26,947 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:27:26,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:27,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 09:27:27,148 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:27:27,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:27:27,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1911492505, now seen corresponding path program 2 times [2021-10-28 09:27:27,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:27:27,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128042380] [2021-10-28 09:27:27,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:27:27,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:27:27,158 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:27:27,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617023100] [2021-10-28 09:27:27,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:27:27,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:27:27,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:27:27,167 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:27:27,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 09:27:27,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:27:27,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:27:27,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:27:27,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:27:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:27:27,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:27:27,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128042380] [2021-10-28 09:27:27,657 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:27:27,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617023100] [2021-10-28 09:27:27,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617023100] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:27:27,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:27:27,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:27:27,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955461150] [2021-10-28 09:27:27,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:27:27,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:27:27,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:27:27,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:27:27,658 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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 09:27:27,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:27:27,690 INFO L93 Difference]: Finished difference Result 118 states and 151 transitions. [2021-10-28 09:27:27,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:27:27,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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 09:27:27,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:27:27,692 INFO L225 Difference]: With dead ends: 118 [2021-10-28 09:27:27,692 INFO L226 Difference]: Without dead ends: 89 [2021-10-28 09:27:27,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:27:27,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-28 09:27:27,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2021-10-28 09:27:27,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 77 states have (on average 1.3376623376623376) internal successors, (103), 79 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:27:27,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 103 transitions. [2021-10-28 09:27:27,704 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 103 transitions. Word has length 21 [2021-10-28 09:27:27,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:27:27,704 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 103 transitions. [2021-10-28 09:27:27,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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 09:27:27,705 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 103 transitions. [2021-10-28 09:27:27,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:27:27,705 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:27:27,706 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:27:27,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:27,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 09:27:27,926 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:27:27,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:27:27,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1135367230, now seen corresponding path program 2 times [2021-10-28 09:27:27,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:27:27,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260361012] [2021-10-28 09:27:27,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:27:27,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:27:27,935 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:27:27,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783643062] [2021-10-28 09:27:27,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:27:27,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:27:27,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:27:27,939 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:27:27,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 09:27:28,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:27:28,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:27:28,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 09:27:28,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:27:39,393 WARN L207 SmtUtils]: Spent 8.05 s on a formula simplification that was a NOOP. DAG size: 34 [2021-10-28 09:27:51,743 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 09:27:51,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:27:51,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260361012] [2021-10-28 09:27:51,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:27:51,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783643062] [2021-10-28 09:27:51,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783643062] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:27:51,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:27:51,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-28 09:27:51,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131910332] [2021-10-28 09:27:51,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:27:51,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:27:51,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:27:51,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:27:51,745 INFO L87 Difference]: Start difference. First operand 80 states and 103 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 09:28:10,452 WARN L207 SmtUtils]: Spent 16.07 s on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-10-28 09:28:11,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:28:11,208 INFO L93 Difference]: Finished difference Result 93 states and 120 transitions. [2021-10-28 09:28:11,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 09:28:11,208 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 09:28:11,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:28:11,209 INFO L225 Difference]: With dead ends: 93 [2021-10-28 09:28:11,209 INFO L226 Difference]: Without dead ends: 91 [2021-10-28 09:28:11,209 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-10-28 09:28:11,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-28 09:28:11,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2021-10-28 09:28:11,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 77 states have (on average 1.3376623376623376) internal successors, (103), 79 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:28:11,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 103 transitions. [2021-10-28 09:28:11,221 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 103 transitions. Word has length 21 [2021-10-28 09:28:11,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:28:11,221 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 103 transitions. [2021-10-28 09:28:11,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 09:28:11,221 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 103 transitions. [2021-10-28 09:28:11,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:28:11,222 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:28:11,222 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:28:11,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-10-28 09:28:11,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:28:11,426 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:28:11,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:28:11,426 INFO L85 PathProgramCache]: Analyzing trace with hash 326020604, now seen corresponding path program 2 times [2021-10-28 09:28:11,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:28:11,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578091594] [2021-10-28 09:28:11,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:28:11,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:28:11,445 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:28:11,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365547405] [2021-10-28 09:28:11,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:28:11,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:28:11,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:28:11,446 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:28:11,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 09:28:12,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:28:12,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:28:12,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 09:28:12,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:28:16,620 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 09:28:16,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:28:16,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578091594] [2021-10-28 09:28:16,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:28:16,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365547405] [2021-10-28 09:28:16,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365547405] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:28:16,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:28:16,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-28 09:28:16,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576352583] [2021-10-28 09:28:16,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:28:16,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:28:16,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:28:16,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:28:16,621 INFO L87 Difference]: Start difference. First operand 80 states and 103 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 09:28:18,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:28:18,366 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2021-10-28 09:28:18,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 09:28:18,367 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 09:28:18,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:28:18,368 INFO L225 Difference]: With dead ends: 98 [2021-10-28 09:28:18,368 INFO L226 Difference]: Without dead ends: 96 [2021-10-28 09:28:18,368 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-10-28 09:28:18,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-28 09:28:18,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2021-10-28 09:28:18,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 81 states have (on average 1.3333333333333333) internal successors, (108), 83 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:28:18,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 108 transitions. [2021-10-28 09:28:18,382 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 108 transitions. Word has length 21 [2021-10-28 09:28:18,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:28:18,383 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 108 transitions. [2021-10-28 09:28:18,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 09:28:18,383 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 108 transitions. [2021-10-28 09:28:18,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 09:28:18,384 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:28:18,384 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:28:18,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 09:28:18,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:28:18,602 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:28:18,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:28:18,602 INFO L85 PathProgramCache]: Analyzing trace with hash -870536625, now seen corresponding path program 1 times [2021-10-28 09:28:18,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:28:18,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649769980] [2021-10-28 09:28:18,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:28:18,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:28:18,609 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:28:18,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1770289402] [2021-10-28 09:28:18,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:28:18,610 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:28:18,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:28:18,619 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:28:18,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 09:28:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:28:19,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:28:19,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:28:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:28:19,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:28:19,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649769980] [2021-10-28 09:28:19,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:28:19,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770289402] [2021-10-28 09:28:19,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770289402] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:28:19,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:28:19,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-28 09:28:19,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858307294] [2021-10-28 09:28:19,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:28:19,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:28:19,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:28:19,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:28:19,190 INFO L87 Difference]: Start difference. First operand 84 states and 108 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:28:19,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:28:19,275 INFO L93 Difference]: Finished difference Result 127 states and 156 transitions. [2021-10-28 09:28:19,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:28:19,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-10-28 09:28:19,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:28:19,277 INFO L225 Difference]: With dead ends: 127 [2021-10-28 09:28:19,277 INFO L226 Difference]: Without dead ends: 94 [2021-10-28 09:28:19,277 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:28:19,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-28 09:28:19,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 80. [2021-10-28 09:28:19,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 77 states have (on average 1.2987012987012987) internal successors, (100), 79 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:28:19,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2021-10-28 09:28:19,291 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 22 [2021-10-28 09:28:19,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:28:19,291 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2021-10-28 09:28:19,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:28:19,292 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2021-10-28 09:28:19,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 09:28:19,293 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:28:19,293 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:28:19,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 09:28:19,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-28 09:28:19,507 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:28:19,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:28:19,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1519233459, now seen corresponding path program 2 times [2021-10-28 09:28:19,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:28:19,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573088238] [2021-10-28 09:28:19,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:28:19,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:28:19,537 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:28:19,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1755791615] [2021-10-28 09:28:19,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:28:19,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:28:19,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:28:19,541 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:28:19,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 09:28:19,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:28:19,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:28:19,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 09:28:19,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:28:20,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:28:20,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:28:20,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573088238] [2021-10-28 09:28:20,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:28:20,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755791615] [2021-10-28 09:28:20,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755791615] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:28:20,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:28:20,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 09:28:20,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347313801] [2021-10-28 09:28:20,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:28:20,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:28:20,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:28:20,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:28:20,208 INFO L87 Difference]: Start difference. First operand 80 states and 100 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:28:20,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:28:20,464 INFO L93 Difference]: Finished difference Result 129 states and 159 transitions. [2021-10-28 09:28:20,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:28:20,464 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-10-28 09:28:20,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:28:20,465 INFO L225 Difference]: With dead ends: 129 [2021-10-28 09:28:20,465 INFO L226 Difference]: Without dead ends: 101 [2021-10-28 09:28:20,465 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:28:20,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-28 09:28:20,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 81. [2021-10-28 09:28:20,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 80 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:28:20,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2021-10-28 09:28:20,480 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 22 [2021-10-28 09:28:20,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:28:20,480 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2021-10-28 09:28:20,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:28:20,480 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2021-10-28 09:28:20,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 09:28:20,480 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:28:20,481 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:28:20,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 09:28:20,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:28:20,682 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:28:20,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:28:20,682 INFO L85 PathProgramCache]: Analyzing trace with hash -275964616, now seen corresponding path program 3 times [2021-10-28 09:28:20,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:28:20,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666153143] [2021-10-28 09:28:20,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:28:20,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:28:20,696 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:28:20,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887768591] [2021-10-28 09:28:20,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:28:20,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:28:20,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:28:20,698 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:28:20,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 09:28:21,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 09:28:21,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:28:21,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 09:28:21,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:28:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:28:21,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:28:21,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666153143] [2021-10-28 09:28:21,440 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:28:21,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887768591] [2021-10-28 09:28:21,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887768591] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:28:21,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:28:21,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 09:28:21,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694065995] [2021-10-28 09:28:21,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:28:21,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:28:21,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:28:21,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:28:21,442 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:28:22,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:28:22,648 INFO L93 Difference]: Finished difference Result 106 states and 138 transitions. [2021-10-28 09:28:22,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:28:22,650 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-28 09:28:22,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:28:22,652 INFO L225 Difference]: With dead ends: 106 [2021-10-28 09:28:22,652 INFO L226 Difference]: Without dead ends: 104 [2021-10-28 09:28:22,653 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:28:22,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-28 09:28:22,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 58. [2021-10-28 09:28:22,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:28:22,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2021-10-28 09:28:22,662 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 23 [2021-10-28 09:28:22,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:28:22,662 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2021-10-28 09:28:22,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:28:22,662 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2021-10-28 09:28:22,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 09:28:22,663 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:28:22,663 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:28:22,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 09:28:22,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:28:22,863 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:28:22,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:28:22,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1052333562, now seen corresponding path program 1 times [2021-10-28 09:28:22,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:28:22,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569081298] [2021-10-28 09:28:22,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:28:22,864 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:28:22,871 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:28:22,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [213636563] [2021-10-28 09:28:22,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:28:22,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:28:22,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:28:22,873 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:28:22,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 09:28:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:28:23,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 09:28:23,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:28:24,350 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 09:28:24,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:28:24,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569081298] [2021-10-28 09:28:24,352 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:28:24,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213636563] [2021-10-28 09:28:24,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213636563] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:28:24,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:28:24,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-28 09:28:24,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278106489] [2021-10-28 09:28:24,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 09:28:24,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:28:24,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 09:28:24,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:28:24,353 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:28:34,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:28:34,312 INFO L93 Difference]: Finished difference Result 132 states and 161 transitions. [2021-10-28 09:28:34,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 09:28:34,313 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-28 09:28:34,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:28:34,313 INFO L225 Difference]: With dead ends: 132 [2021-10-28 09:28:34,313 INFO L226 Difference]: Without dead ends: 130 [2021-10-28 09:28:34,315 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=244, Invalid=686, Unknown=0, NotChecked=0, Total=930 [2021-10-28 09:28:34,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-28 09:28:34,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 87. [2021-10-28 09:28:34,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 85 states have (on average 1.3176470588235294) internal successors, (112), 86 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:28:34,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2021-10-28 09:28:34,336 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 24 [2021-10-28 09:28:34,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:28:34,337 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2021-10-28 09:28:34,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:28:34,337 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2021-10-28 09:28:34,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 09:28:34,338 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:28:34,338 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:28:34,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 09:28:34,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 09:28:34,550 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:28:34,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:28:34,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1639827719, now seen corresponding path program 1 times [2021-10-28 09:28:34,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:28:34,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295183242] [2021-10-28 09:28:34,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:28:34,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:28:34,567 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:28:34,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1473134924] [2021-10-28 09:28:34,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:28:34,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:28:34,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:28:34,588 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:28:34,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 09:28:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:28:35,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 09:28:35,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:28:35,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 09:28:35,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:28:35,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295183242] [2021-10-28 09:28:35,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:28:35,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473134924] [2021-10-28 09:28:35,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473134924] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:28:35,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:28:35,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 09:28:35,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569490661] [2021-10-28 09:28:35,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:28:35,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:28:35,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:28:35,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:28:35,335 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:28:35,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:28:35,471 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2021-10-28 09:28:35,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:28:35,472 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-28 09:28:35,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:28:35,473 INFO L225 Difference]: With dead ends: 96 [2021-10-28 09:28:35,473 INFO L226 Difference]: Without dead ends: 90 [2021-10-28 09:28:35,473 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:28:35,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-28 09:28:35,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2021-10-28 09:28:35,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 82 states have (on average 1.3048780487804879) internal successors, (107), 83 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:28:35,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2021-10-28 09:28:35,488 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 26 [2021-10-28 09:28:35,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:28:35,488 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2021-10-28 09:28:35,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:28:35,489 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2021-10-28 09:28:35,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 09:28:35,489 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:28:35,489 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:28:35,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-28 09:28:35,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 09:28:35,703 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:28:35,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:28:35,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1975081207, now seen corresponding path program 1 times [2021-10-28 09:28:35,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:28:35,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715129667] [2021-10-28 09:28:35,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:28:35,704 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:28:35,711 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:28:35,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674519152] [2021-10-28 09:28:35,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:28:35,712 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:28:35,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:28:35,713 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:28:35,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-28 09:28:36,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:28:36,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-28 09:28:36,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:28:36,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:28:36,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:28:36,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715129667] [2021-10-28 09:28:36,655 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:28:36,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674519152] [2021-10-28 09:28:36,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674519152] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:28:36,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:28:36,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-28 09:28:36,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566900790] [2021-10-28 09:28:36,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:28:36,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:28:36,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:28:36,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:28:36,658 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:28:37,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:28:37,019 INFO L93 Difference]: Finished difference Result 88 states and 111 transitions. [2021-10-28 09:28:37,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 09:28:37,019 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-28 09:28:37,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:28:37,020 INFO L225 Difference]: With dead ends: 88 [2021-10-28 09:28:37,020 INFO L226 Difference]: Without dead ends: 78 [2021-10-28 09:28:37,021 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-10-28 09:28:37,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-28 09:28:37,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2021-10-28 09:28:37,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.295774647887324) internal successors, (92), 71 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:28:37,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2021-10-28 09:28:37,038 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 26 [2021-10-28 09:28:37,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:28:37,038 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2021-10-28 09:28:37,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:28:37,038 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2021-10-28 09:28:37,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 09:28:37,039 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:28:37,039 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:28:37,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-28 09:28:37,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-28 09:28:37,239 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:28:37,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:28:37,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1588979411, now seen corresponding path program 2 times [2021-10-28 09:28:37,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:28:37,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329654762] [2021-10-28 09:28:37,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:28:37,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:28:37,248 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:28:37,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875851819] [2021-10-28 09:28:37,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:28:37,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:28:37,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:28:37,250 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:28:37,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-28 09:28:37,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-28 09:28:37,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:28:37,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 09:28:37,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:28:38,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 09:28:38,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:28:38,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329654762] [2021-10-28 09:28:38,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:28:38,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875851819] [2021-10-28 09:28:38,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875851819] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:28:38,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:28:38,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 09:28:38,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568600780] [2021-10-28 09:28:38,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:28:38,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:28:38,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:28:38,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:28:38,270 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:28:43,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:28:43,336 INFO L93 Difference]: Finished difference Result 100 states and 124 transitions. [2021-10-28 09:28:43,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:28:43,336 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-28 09:28:43,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:28:43,337 INFO L225 Difference]: With dead ends: 100 [2021-10-28 09:28:43,337 INFO L226 Difference]: Without dead ends: 96 [2021-10-28 09:28:43,337 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:28:43,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-28 09:28:43,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 83. [2021-10-28 09:28:43,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.3048780487804879) internal successors, (107), 82 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:28:43,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 107 transitions. [2021-10-28 09:28:43,352 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 107 transitions. Word has length 26 [2021-10-28 09:28:43,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:28:43,352 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 107 transitions. [2021-10-28 09:28:43,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:28:43,352 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 107 transitions. [2021-10-28 09:28:43,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 09:28:43,353 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:28:43,353 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:28:43,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-28 09:28:43,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 09:28:43,553 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:28:43,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:28:43,554 INFO L85 PathProgramCache]: Analyzing trace with hash 2017185649, now seen corresponding path program 2 times [2021-10-28 09:28:43,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:28:43,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526074434] [2021-10-28 09:28:43,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:28:43,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:28:43,564 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:28:43,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441545016] [2021-10-28 09:28:43,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:28:43,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:28:43,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:28:43,571 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:28:43,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-28 09:28:44,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-28 09:28:44,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:28:44,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 09:28:44,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:28:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 09:28:46,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:28:46,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526074434] [2021-10-28 09:28:46,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:28:46,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441545016] [2021-10-28 09:28:46,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441545016] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:28:46,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:28:46,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 09:28:46,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820407759] [2021-10-28 09:28:46,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:28:46,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:28:46,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:28:46,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:28:46,704 INFO L87 Difference]: Start difference. First operand 83 states and 107 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:28:53,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:28:53,365 INFO L93 Difference]: Finished difference Result 83 states and 107 transitions. [2021-10-28 09:28:53,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:28:53,365 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-28 09:28:53,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:28:53,365 INFO L225 Difference]: With dead ends: 83 [2021-10-28 09:28:53,365 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 09:28:53,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:28:53,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 09:28:53,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 09:28:53,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:28:53,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 09:28:53,367 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-10-28 09:28:53,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:28:53,367 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:28:53,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:28:53,367 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 09:28:53,367 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 09:28:53,369 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:28:53,369 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:28:53,369 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:28:53,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-28 09:28:53,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 09:28:53,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-28 09:28:53,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:28:54,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:28:54,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:28:54,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:28:55,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:29:46,899 WARN L207 SmtUtils]: Spent 51.72 s on a formula simplification. DAG size of input: 232 DAG size of output: 34 [2021-10-28 09:29:53,651 WARN L207 SmtUtils]: Spent 6.75 s on a formula simplification. DAG size of input: 221 DAG size of output: 31 [2021-10-28 09:29:53,832 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-10-28 09:29:53,832 INFO L857 garLoopResultBuilder]: For program point L44(lines 44 54) no Hoare annotation was computed. [2021-10-28 09:29:53,832 INFO L857 garLoopResultBuilder]: For program point L40(lines 40 54) no Hoare annotation was computed. [2021-10-28 09:29:53,832 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-28 09:29:53,832 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-28 09:29:53,832 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-28 09:29:53,833 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-10-28 09:29:53,833 INFO L857 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-10-28 09:29:53,833 INFO L853 garLoopResultBuilder]: At program point L12-2(lines 37 38) the Hoare annotation is: (let ((.cse0 (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0))) (and (= ULTIMATE.start_assume_abort_if_not_~cond 1) (<= 0 ULTIMATE.start_main_~b~0) (= .cse0 (+ ULTIMATE.start_main_~q~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~b~0))) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (< 0 (+ ULTIMATE.start_main_~a~0 1)) (<= 1 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 10) (or (= (mod (+ .cse0 (* ULTIMATE.start_main_~q~0 (- 1))) (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~b~0)) 0) (= ULTIMATE.start_main_~q~0 .cse0)) (<= ULTIMATE.start_main_~y~0 10) (<= 0 ULTIMATE.start_main_~x~0))) [2021-10-28 09:29:53,833 INFO L857 garLoopResultBuilder]: For program point L12-3(lines 12 15) no Hoare annotation was computed. [2021-10-28 09:29:53,833 INFO L857 garLoopResultBuilder]: For program point L8(lines 8 10) no Hoare annotation was computed. [2021-10-28 09:29:53,833 INFO L857 garLoopResultBuilder]: For program point L8-1(lines 8 10) no Hoare annotation was computed. [2021-10-28 09:29:53,833 INFO L853 garLoopResultBuilder]: At program point L12-5(lines 11 17) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (<= 1 ULTIMATE.start_main_~y~0)) (.cse2 (<= ULTIMATE.start_main_~x~0 10)) (.cse3 (<= ULTIMATE.start_main_~y~0 10)) (.cse4 (<= 0 ULTIMATE.start_main_~x~0))) (or (and (= ULTIMATE.start_main_~a~0 0) .cse0 .cse1 (<= 1 ULTIMATE.start_main_~b~0) .cse2 .cse3 .cse4) (and .cse0 (= ULTIMATE.start_main_~b~0 0) (= (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0) (+ ULTIMATE.start_main_~q~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~b~0))) .cse1 .cse2 .cse3 (<= 0 ULTIMATE.start_main_~a~0) .cse4))) [2021-10-28 09:29:53,833 INFO L857 garLoopResultBuilder]: For program point L8-2(lines 8 10) no Hoare annotation was computed. [2021-10-28 09:29:53,833 INFO L857 garLoopResultBuilder]: For program point L12-6(lines 12 15) no Hoare annotation was computed. [2021-10-28 09:29:53,833 INFO L860 garLoopResultBuilder]: At program point L12-8(lines 11 17) the Hoare annotation is: true [2021-10-28 09:29:53,833 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-28 09:29:53,834 INFO L857 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-10-28 09:29:53,834 INFO L857 garLoopResultBuilder]: For program point L13-1(lines 13 14) no Hoare annotation was computed. [2021-10-28 09:29:53,834 INFO L857 garLoopResultBuilder]: For program point L13-2(lines 13 14) no Hoare annotation was computed. [2021-10-28 09:29:53,834 INFO L857 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2021-10-28 09:29:53,834 INFO L857 garLoopResultBuilder]: For program point L9-2(line 9) no Hoare annotation was computed. [2021-10-28 09:29:53,834 INFO L857 garLoopResultBuilder]: For program point L9-4(line 9) no Hoare annotation was computed. [2021-10-28 09:29:53,834 INFO L857 garLoopResultBuilder]: For program point L34-2(lines 34 55) no Hoare annotation was computed. [2021-10-28 09:29:53,834 INFO L860 garLoopResultBuilder]: At program point L59(lines 19 60) the Hoare annotation is: true [2021-10-28 09:29:53,834 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-10-28 09:29:53,834 INFO L857 garLoopResultBuilder]: For program point L47(lines 47 54) no Hoare annotation was computed. [2021-10-28 09:29:53,834 INFO L853 garLoopResultBuilder]: At program point L47-2(lines 34 55) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (= (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0) (+ ULTIMATE.start_main_~q~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~b~0)))) (.cse2 (<= ULTIMATE.start_main_~x~0 10)) (.cse3 (<= ULTIMATE.start_main_~y~0 10)) (.cse4 (<= 0 ULTIMATE.start_main_~x~0))) (or (and .cse0 (<= 0 ULTIMATE.start_main_~b~0) .cse1 (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= 1 ULTIMATE.start_main_~y~0) .cse2 .cse3 (<= 0 ULTIMATE.start_main_~a~0) .cse4) (and .cse0 .cse1 (= ULTIMATE.start_main_~p~0 1) (<= 1 ULTIMATE.start_main_~b~0) (= ULTIMATE.start_main_~q~0 0) .cse2 .cse3 .cse4 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)))) [2021-10-28 09:29:53,837 INFO L731 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:29:53,838 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:29:53,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:29:53 BoogieIcfgContainer [2021-10-28 09:29:53,855 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:29:53,856 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:29:53,856 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:29:53,856 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:29:53,857 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:24:15" (3/4) ... [2021-10-28 09:29:53,859 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 09:29:53,869 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-10-28 09:29:53,869 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 09:29:53,870 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:29:53,870 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:29:53,907 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:29:53,908 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:29:53,909 INFO L168 Benchmark]: Toolchain (without parser) took 339065.32 ms. Allocated memory was 125.8 MB in the beginning and 153.1 MB in the end (delta: 27.3 MB). Free memory was 87.6 MB in the beginning and 98.1 MB in the end (delta: -10.5 MB). Peak memory consumption was 17.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:29:53,909 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 125.8 MB. Free memory was 104.3 MB in the beginning and 104.2 MB in the end (delta: 70.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:29:53,910 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.54 ms. Allocated memory is still 125.8 MB. Free memory was 87.4 MB in the beginning and 100.2 MB in the end (delta: -12.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:29:53,910 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.30 ms. Allocated memory is still 125.8 MB. Free memory was 100.2 MB in the beginning and 98.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:29:53,911 INFO L168 Benchmark]: Boogie Preprocessor took 24.82 ms. Allocated memory is still 125.8 MB. Free memory was 98.2 MB in the beginning and 97.3 MB in the end (delta: 881.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:29:53,911 INFO L168 Benchmark]: RCFGBuilder took 335.68 ms. Allocated memory is still 125.8 MB. Free memory was 97.3 MB in the beginning and 85.9 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:29:53,912 INFO L168 Benchmark]: TraceAbstraction took 338334.70 ms. Allocated memory was 125.8 MB in the beginning and 153.1 MB in the end (delta: 27.3 MB). Free memory was 85.5 MB in the beginning and 101.2 MB in the end (delta: -15.7 MB). Peak memory consumption was 108.6 MB. Max. memory is 16.1 GB. [2021-10-28 09:29:53,912 INFO L168 Benchmark]: Witness Printer took 52.17 ms. Allocated memory is still 153.1 MB. Free memory was 101.2 MB in the beginning and 98.1 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:29:53,915 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 125.8 MB. Free memory was 104.3 MB in the beginning and 104.2 MB in the end (delta: 70.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 271.54 ms. Allocated memory is still 125.8 MB. Free memory was 87.4 MB in the beginning and 100.2 MB in the end (delta: -12.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.30 ms. Allocated memory is still 125.8 MB. Free memory was 100.2 MB in the beginning and 98.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.82 ms. Allocated memory is still 125.8 MB. Free memory was 98.2 MB in the beginning and 97.3 MB in the end (delta: 881.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 335.68 ms. Allocated memory is still 125.8 MB. Free memory was 97.3 MB in the beginning and 85.9 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 338334.70 ms. Allocated memory was 125.8 MB in the beginning and 153.1 MB in the end (delta: 27.3 MB). Free memory was 85.5 MB in the beginning and 101.2 MB in the end (delta: -15.7 MB). Peak memory consumption was 108.6 MB. Max. memory is 16.1 GB. * Witness Printer took 52.17 ms. Allocated memory is still 153.1 MB. Free memory was 101.2 MB in the beginning and 98.1 MB in the end (delta: 3.2 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 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 338.2s, OverallIterations: 28, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 161.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 60.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 453 SDtfs, 1837 SDslu, 1183 SDs, 0 SdLazy, 2861 SolverSat, 612 SolverUnsat, 20 SolverUnknown, 0 SolverNotchecked, 59.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 678 GetRequests, 344 SyntacticMatches, 3 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 123.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=24, InterpolantAutomatonStates: 280, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 28 MinimizatonAttempts, 365 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 38 NumberOfFragments, 184 HoareAnnotationTreeSize, 5 FomulaSimplifications, 52667601 FormulaSimplificationTreeSizeReduction, 1.5s HoareSimplificationTime, 5 FomulaSimplificationsInter, 22662 FormulaSimplificationTreeSizeReductionInter, 58.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 100.7s InterpolantComputationTime, 555 NumberOfCodeBlocks, 525 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 527 ConstructedInterpolants, 7 QuantifiedInterpolants, 6179 SizeOfPredicates, 247 NumberOfNonLiveVariables, 2540 ConjunctsInSsa, 630 ConjunctsInUnsatCore, 28 InterpolantComputations, 11 PerfectInterpolantSequences, 94/184 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 - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((((((((cond == 1 && 0 <= b) && x * y == q + a * p * b) && 1 == cond) && 0 < a + 1) && 1 <= y) && x <= 10) && ((x * y + q * -1) % (a * b) == 0 || q == x * y)) && y <= 10) && 0 <= x - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((((cond == 1 && 0 <= b) && x * y == q + a * p * b) && 1 == cond) && 1 <= y) && x <= 10) && y <= 10) && 0 <= a) && 0 <= x) || ((((((((cond == 1 && x * y == q + a * p * b) && p == 1) && 1 <= b) && q == 0) && x <= 10) && y <= 10) && 0 <= x) && b == y) - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: ((((((a == 0 && cond == 1) && 1 <= y) && 1 <= b) && x <= 10) && y <= 10) && 0 <= x) || (((((((cond == 1 && b == 0) && x * y == q + a * p * b) && 1 <= y) && x <= 10) && y <= 10) && 0 <= a) && 0 <= x) RESULT: Ultimate proved your program to be correct! [2021-10-28 09:29:53,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0425683a-d1b3-4c6b-b0a9-9b07a62b82a5/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...