./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX --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 20f9ce6814caacb533e5bf2143ac3e067387f11238548a0b9b41e2de8e2cc436 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:39:25,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:39:25,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:39:25,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:39:25,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:39:25,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:39:25,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:39:25,322 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:39:25,324 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:39:25,332 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:39:25,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:39:25,336 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:39:25,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:39:25,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:39:25,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:39:25,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:39:25,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:39:25,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:39:25,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:39:25,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:39:25,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:39:25,370 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:39:25,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:39:25,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:39:25,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:39:25,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:39:25,383 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:39:25,385 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:39:25,386 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:39:25,387 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:39:25,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:39:25,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:39:25,392 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:39:25,393 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:39:25,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:39:25,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:39:25,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:39:25,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:39:25,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:39:25,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:39:25,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:39:25,399 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 10:39:25,451 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:39:25,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:39:25,455 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:39:25,455 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:39:25,457 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:39:25,457 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:39:25,457 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:39:25,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:39:25,458 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:39:25,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:39:25,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:39:25,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:39:25,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 10:39:25,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:39:25,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 10:39:25,461 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:39:25,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 10:39:25,461 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:39:25,461 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 10:39:25,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:39:25,462 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:39:25,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:39:25,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:39:25,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:39:25,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:39:25,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 10:39:25,464 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:39:25,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:39:25,464 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 10:39:25,466 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 10:39:25,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 10:39:25,466 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:39:25,467 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_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20f9ce6814caacb533e5bf2143ac3e067387f11238548a0b9b41e2de8e2cc436 [2021-11-09 10:39:25,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:39:25,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:39:25,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:39:25,754 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:39:25,755 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:39:25,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c [2021-11-09 10:39:25,844 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/data/97f9a0f0e/fcce1a2f0cc14fbba8a1f0c07e3ddbb7/FLAGc9c519dc3 [2021-11-09 10:39:26,318 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:39:26,318 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c [2021-11-09 10:39:26,337 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/data/97f9a0f0e/fcce1a2f0cc14fbba8a1f0c07e3ddbb7/FLAGc9c519dc3 [2021-11-09 10:39:26,707 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/data/97f9a0f0e/fcce1a2f0cc14fbba8a1f0c07e3ddbb7 [2021-11-09 10:39:26,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:39:26,711 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 10:39:26,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:39:26,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:39:26,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:39:26,717 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:39:26" (1/1) ... [2021-11-09 10:39:26,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ada556c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:26, skipping insertion in model container [2021-11-09 10:39:26,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:39:26" (1/1) ... [2021-11-09 10:39:26,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:39:26,742 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:39:26,906 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_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c[489,502] [2021-11-09 10:39:26,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:39:26,937 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:39:26,950 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_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c[489,502] [2021-11-09 10:39:26,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:39:26,972 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:39:26,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:26 WrapperNode [2021-11-09 10:39:26,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:39:26,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 10:39:26,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 10:39:26,975 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 10:39:26,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:26" (1/1) ... [2021-11-09 10:39:26,990 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:26" (1/1) ... [2021-11-09 10:39:27,014 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 10:39:27,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:39:27,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:39:27,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:39:27,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:26" (1/1) ... [2021-11-09 10:39:27,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:26" (1/1) ... [2021-11-09 10:39:27,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:26" (1/1) ... [2021-11-09 10:39:27,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:26" (1/1) ... [2021-11-09 10:39:27,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:26" (1/1) ... [2021-11-09 10:39:27,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:26" (1/1) ... [2021-11-09 10:39:27,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:26" (1/1) ... [2021-11-09 10:39:27,042 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:39:27,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:39:27,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:39:27,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:39:27,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:26" (1/1) ... [2021-11-09 10:39:27,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:39:27,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:39:27,079 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:39:27,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:39:27,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 10:39:27,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:39:27,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:39:27,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:39:27,390 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:39:27,391 INFO L299 CfgBuilder]: Removed 27 assume(true) statements. [2021-11-09 10:39:27,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:39:27 BoogieIcfgContainer [2021-11-09 10:39:27,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:39:27,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:39:27,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:39:27,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:39:27,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:39:26" (1/3) ... [2021-11-09 10:39:27,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4255fe39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:39:27, skipping insertion in model container [2021-11-09 10:39:27,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:26" (2/3) ... [2021-11-09 10:39:27,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4255fe39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:39:27, skipping insertion in model container [2021-11-09 10:39:27,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:39:27" (3/3) ... [2021-11-09 10:39:27,403 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound20.c [2021-11-09 10:39:27,409 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:39:27,409 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-09 10:39:27,481 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:39:27,490 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 [2021-11-09 10:39:27,491 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-09 10:39:27,507 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 43 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:27,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 10:39:27,517 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:39:27,518 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:39:27,519 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:39:27,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:39:27,526 INFO L85 PathProgramCache]: Analyzing trace with hash -144177098, now seen corresponding path program 1 times [2021-11-09 10:39:27,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:39:27,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313504577] [2021-11-09 10:39:27,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:27,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:39:27,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:39:27,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:39:27,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:39:27,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313504577] [2021-11-09 10:39:27,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313504577] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:39:27,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:39:27,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:39:27,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168484366] [2021-11-09 10:39:27,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 10:39:27,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:39:27,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 10:39:27,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:39:27,734 INFO L87 Difference]: Start difference. First operand has 44 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 43 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:27,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:39:27,754 INFO L93 Difference]: Finished difference Result 85 states and 112 transitions. [2021-11-09 10:39:27,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 10:39:27,756 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-09 10:39:27,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:39:27,765 INFO L225 Difference]: With dead ends: 85 [2021-11-09 10:39:27,765 INFO L226 Difference]: Without dead ends: 40 [2021-11-09 10:39:27,768 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 [2021-11-09 10:39:27,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-09 10:39:27,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-09 10:39:27,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:27,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-11-09 10:39:27,804 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 13 [2021-11-09 10:39:27,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:39:27,805 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-11-09 10:39:27,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:27,805 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-11-09 10:39:27,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 10:39:27,806 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:39:27,806 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:39:27,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 10:39:27,807 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:39:27,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:39:27,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1281167042, now seen corresponding path program 1 times [2021-11-09 10:39:27,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:39:27,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203138380] [2021-11-09 10:39:27,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:27,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:39:27,834 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:39:27,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740304535] [2021-11-09 10:39:27,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:27,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:27,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:39:27,842 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:39:27,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 10:39:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:39:27,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 10:39:27,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:39:28,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:39:28,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:39:28,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203138380] [2021-11-09 10:39:28,068 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:39:28,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740304535] [2021-11-09 10:39:28,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740304535] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:39:28,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:39:28,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:39:28,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178519262] [2021-11-09 10:39:28,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:39:28,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:39:28,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:39:28,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:39:28,073 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:28,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:39:28,162 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2021-11-09 10:39:28,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:39:28,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-09 10:39:28,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:39:28,164 INFO L225 Difference]: With dead ends: 70 [2021-11-09 10:39:28,165 INFO L226 Difference]: Without dead ends: 66 [2021-11-09 10:39:28,165 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:39:28,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-09 10:39:28,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2021-11-09 10:39:28,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.297872340425532) internal successors, (61), 53 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:28,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-11-09 10:39:28,175 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 13 [2021-11-09 10:39:28,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:39:28,176 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-11-09 10:39:28,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:28,176 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-11-09 10:39:28,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 10:39:28,177 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:39:28,177 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:39:28,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-09 10:39:28,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:28,396 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:39:28,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:39:28,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1454243009, now seen corresponding path program 1 times [2021-11-09 10:39:28,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:39:28,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302870067] [2021-11-09 10:39:28,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:28,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:39:28,441 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:39:28,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850406961] [2021-11-09 10:39:28,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:28,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:28,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:39:28,449 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:39:28,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 10:39:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:39:28,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 10:39:28,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:39:29,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:39:29,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:39:29,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302870067] [2021-11-09 10:39:29,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:39:29,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850406961] [2021-11-09 10:39:29,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850406961] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:39:29,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:39:29,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 10:39:29,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312119501] [2021-11-09 10:39:29,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:39:29,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:39:29,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:39:29,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:39:29,046 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2021-11-09 10:39:29,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:39:29,316 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-11-09 10:39:29,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:39:29,317 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 [2021-11-09 10:39:29,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:39:29,322 INFO L225 Difference]: With dead ends: 66 [2021-11-09 10:39:29,322 INFO L226 Difference]: Without dead ends: 64 [2021-11-09 10:39:29,324 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:39:29,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-09 10:39:29,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2021-11-09 10:39:29,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:29,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2021-11-09 10:39:29,346 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 15 [2021-11-09 10:39:29,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:39:29,347 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2021-11-09 10:39:29,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2021-11-09 10:39:29,348 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2021-11-09 10:39:29,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 10:39:29,349 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:39:29,349 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:39:29,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-09 10:39:29,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:29,575 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:39:29,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:39:29,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1663317220, now seen corresponding path program 1 times [2021-11-09 10:39:29,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:39:29,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706338997] [2021-11-09 10:39:29,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:29,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:39:29,605 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:39:29,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309981581] [2021-11-09 10:39:29,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:29,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:29,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:39:29,626 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:39:29,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 10:39:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:39:29,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 10:39:29,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:39:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:39:30,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:39:30,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706338997] [2021-11-09 10:39:30,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:39:30,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309981581] [2021-11-09 10:39:30,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309981581] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:39:30,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:39:30,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 10:39:30,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177198934] [2021-11-09 10:39:30,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:39:30,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:39:30,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:39:30,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:39:30,045 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-11-09 10:39:30,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:39:30,245 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2021-11-09 10:39:30,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 10:39:30,245 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-11-09 10:39:30,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:39:30,247 INFO L225 Difference]: With dead ends: 100 [2021-11-09 10:39:30,247 INFO L226 Difference]: Without dead ends: 92 [2021-11-09 10:39:30,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:39:30,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-09 10:39:30,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-11-09 10:39:30,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 79 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:30,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2021-11-09 10:39:30,261 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 17 [2021-11-09 10:39:30,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:39:30,262 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2021-11-09 10:39:30,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-11-09 10:39:30,262 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2021-11-09 10:39:30,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 10:39:30,263 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:39:30,264 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:39:30,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 10:39:30,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:30,491 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:39:30,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:39:30,491 INFO L85 PathProgramCache]: Analyzing trace with hash 850548497, now seen corresponding path program 1 times [2021-11-09 10:39:30,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:39:30,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143682366] [2021-11-09 10:39:30,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:30,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:39:30,508 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:39:30,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48608367] [2021-11-09 10:39:30,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:30,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:30,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:39:30,509 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:39:30,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 10:39:30,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:39:30,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 10:39:30,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:39:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:39:30,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:39:30,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143682366] [2021-11-09 10:39:30,687 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:39:30,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48608367] [2021-11-09 10:39:30,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48608367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:39:30,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:39:30,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:39:30,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930680182] [2021-11-09 10:39:30,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:39:30,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:39:30,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:39:30,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:39:30,697 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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) [2021-11-09 10:39:30,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:39:30,752 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2021-11-09 10:39:30,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:39:30,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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 [2021-11-09 10:39:30,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:39:30,755 INFO L225 Difference]: With dead ends: 80 [2021-11-09 10:39:30,755 INFO L226 Difference]: Without dead ends: 78 [2021-11-09 10:39:30,756 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:39:30,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-09 10:39:30,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-09 10:39:30,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 72 states have (on average 1.25) internal successors, (90), 77 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:30,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2021-11-09 10:39:30,776 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 20 [2021-11-09 10:39:30,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:39:30,777 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2021-11-09 10:39:30,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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) [2021-11-09 10:39:30,777 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2021-11-09 10:39:30,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 10:39:30,778 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:39:30,778 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:39:30,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 10:39:30,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:30,998 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:39:30,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:39:30,998 INFO L85 PathProgramCache]: Analyzing trace with hash 598788611, now seen corresponding path program 1 times [2021-11-09 10:39:30,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:39:30,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762444619] [2021-11-09 10:39:30,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:30,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:39:31,013 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:39:31,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117989595] [2021-11-09 10:39:31,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:31,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:31,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:39:31,015 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:39:31,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 10:39:31,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:39:31,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 10:39:31,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:39:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 10:39:31,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:39:31,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762444619] [2021-11-09 10:39:31,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:39:31,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117989595] [2021-11-09 10:39:31,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117989595] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:39:31,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:39:31,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-11-09 10:39:31,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2774942] [2021-11-09 10:39:31,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:39:31,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:39:31,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:39:31,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:39:31,264 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2021-11-09 10:39:31,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:39:31,312 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2021-11-09 10:39:31,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:39:31,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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 [2021-11-09 10:39:31,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:39:31,316 INFO L225 Difference]: With dead ends: 86 [2021-11-09 10:39:31,316 INFO L226 Difference]: Without dead ends: 80 [2021-11-09 10:39:31,317 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:39:31,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-09 10:39:31,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2021-11-09 10:39:31,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:31,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2021-11-09 10:39:31,335 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 21 [2021-11-09 10:39:31,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:39:31,335 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2021-11-09 10:39:31,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2021-11-09 10:39:31,336 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2021-11-09 10:39:31,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 10:39:31,337 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:39:31,337 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:39:31,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 10:39:31,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 10:39:31,552 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:39:31,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:39:31,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1333477300, now seen corresponding path program 1 times [2021-11-09 10:39:31,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:39:31,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437746587] [2021-11-09 10:39:31,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:31,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:39:31,569 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:39:31,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1079279574] [2021-11-09 10:39:31,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:31,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:31,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:39:31,571 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:39:31,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 10:39:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:39:31,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 10:39:31,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:39:31,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:39:31,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:39:31,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437746587] [2021-11-09 10:39:31,820 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:39:31,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079279574] [2021-11-09 10:39:31,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079279574] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:39:31,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:39:31,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 10:39:31,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347092385] [2021-11-09 10:39:31,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:39:31,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:39:31,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:39:31,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:39:31,822 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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) [2021-11-09 10:39:31,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:39:31,948 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2021-11-09 10:39:31,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:39:31,949 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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 [2021-11-09 10:39:31,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:39:31,949 INFO L225 Difference]: With dead ends: 80 [2021-11-09 10:39:31,950 INFO L226 Difference]: Without dead ends: 72 [2021-11-09 10:39:31,950 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:39:31,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-09 10:39:31,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2021-11-09 10:39:31,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.2) internal successors, (78), 69 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:31,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2021-11-09 10:39:31,958 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 22 [2021-11-09 10:39:31,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:39:31,958 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2021-11-09 10:39:31,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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) [2021-11-09 10:39:31,958 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2021-11-09 10:39:31,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 10:39:31,959 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:39:31,959 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:39:31,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 10:39:32,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-09 10:39:32,187 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:39:32,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:39:32,187 INFO L85 PathProgramCache]: Analyzing trace with hash -89606074, now seen corresponding path program 1 times [2021-11-09 10:39:32,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:39:32,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403567263] [2021-11-09 10:39:32,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:32,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:39:32,199 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:39:32,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1524496995] [2021-11-09 10:39:32,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:32,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:32,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:39:32,209 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:39:32,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 10:39:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:39:32,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 10:39:32,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:39:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:39:32,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:39:32,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403567263] [2021-11-09 10:39:32,664 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:39:32,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524496995] [2021-11-09 10:39:32,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524496995] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:39:32,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:39:32,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 10:39:32,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395680877] [2021-11-09 10:39:32,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:39:32,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:39:32,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:39:32,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:39:32,667 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:32,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:39:32,968 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2021-11-09 10:39:32,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:39:32,968 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-09 10:39:32,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:39:32,969 INFO L225 Difference]: With dead ends: 105 [2021-11-09 10:39:32,969 INFO L226 Difference]: Without dead ends: 103 [2021-11-09 10:39:32,970 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:39:32,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-09 10:39:32,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 74. [2021-11-09 10:39:32,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 73 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:32,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2021-11-09 10:39:32,978 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 23 [2021-11-09 10:39:32,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:39:32,978 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2021-11-09 10:39:32,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:32,979 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2021-11-09 10:39:32,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 10:39:32,979 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:39:32,980 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:39:33,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 10:39:33,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:33,199 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:39:33,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:39:33,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1021281049, now seen corresponding path program 1 times [2021-11-09 10:39:33,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:39:33,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234940720] [2021-11-09 10:39:33,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:33,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:39:33,217 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:39:33,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971562347] [2021-11-09 10:39:33,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:33,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:33,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:39:33,221 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:39:33,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 10:39:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:39:33,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 10:39:33,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:39:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:39:33,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:39:33,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234940720] [2021-11-09 10:39:33,765 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:39:33,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971562347] [2021-11-09 10:39:33,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971562347] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:39:33,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:39:33,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 10:39:33,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339749327] [2021-11-09 10:39:33,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:39:33,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:39:33,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:39:33,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:39:33,767 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:33,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:39:33,927 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2021-11-09 10:39:33,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:39:33,928 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-09 10:39:33,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:39:33,929 INFO L225 Difference]: With dead ends: 116 [2021-11-09 10:39:33,929 INFO L226 Difference]: Without dead ends: 104 [2021-11-09 10:39:33,929 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:39:33,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-09 10:39:33,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2021-11-09 10:39:33,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 95 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:33,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 109 transitions. [2021-11-09 10:39:33,941 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 109 transitions. Word has length 25 [2021-11-09 10:39:33,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:39:33,942 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 109 transitions. [2021-11-09 10:39:33,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:33,942 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 109 transitions. [2021-11-09 10:39:33,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 10:39:33,943 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:39:33,943 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:39:33,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 10:39:34,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-09 10:39:34,171 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:39:34,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:39:34,171 INFO L85 PathProgramCache]: Analyzing trace with hash 477321350, now seen corresponding path program 1 times [2021-11-09 10:39:34,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:39:34,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453225034] [2021-11-09 10:39:34,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:34,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:39:34,185 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:39:34,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171855034] [2021-11-09 10:39:34,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:34,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:34,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:39:34,186 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:39:34,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 10:39:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:39:34,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 10:39:34,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:39:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:39:34,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:39:34,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453225034] [2021-11-09 10:39:34,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:39:34,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171855034] [2021-11-09 10:39:34,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171855034] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:39:34,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:39:34,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 10:39:34,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8574342] [2021-11-09 10:39:34,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:39:34,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:39:34,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:39:34,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:39:34,747 INFO L87 Difference]: Start difference. First operand 96 states and 109 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:34,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:39:34,912 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2021-11-09 10:39:34,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 10:39:34,912 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-09 10:39:34,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:39:34,913 INFO L225 Difference]: With dead ends: 116 [2021-11-09 10:39:34,913 INFO L226 Difference]: Without dead ends: 106 [2021-11-09 10:39:34,914 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:39:34,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-09 10:39:34,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2021-11-09 10:39:34,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 102 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:34,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2021-11-09 10:39:34,927 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 29 [2021-11-09 10:39:34,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:39:34,928 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2021-11-09 10:39:34,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:34,928 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2021-11-09 10:39:34,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 10:39:34,931 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:39:34,931 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:39:34,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 10:39:35,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 10:39:35,147 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:39:35,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:39:35,147 INFO L85 PathProgramCache]: Analyzing trace with hash 219215494, now seen corresponding path program 2 times [2021-11-09 10:39:35,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:39:35,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539806297] [2021-11-09 10:39:35,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:35,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:39:35,161 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:39:35,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [34924273] [2021-11-09 10:39:35,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:39:35,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:35,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:39:35,162 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:39:35,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 10:39:35,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:39:35,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:39:35,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 10:39:35,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:39:35,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:39:35,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:39:35,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539806297] [2021-11-09 10:39:35,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:39:35,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34924273] [2021-11-09 10:39:35,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34924273] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:39:35,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:39:35,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 10:39:35,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223810229] [2021-11-09 10:39:35,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:39:35,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:39:35,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:39:35,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:39:35,630 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:35,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:39:35,762 INFO L93 Difference]: Finished difference Result 131 states and 147 transitions. [2021-11-09 10:39:35,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 10:39:35,763 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-09 10:39:35,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:39:35,764 INFO L225 Difference]: With dead ends: 131 [2021-11-09 10:39:35,764 INFO L226 Difference]: Without dead ends: 127 [2021-11-09 10:39:35,765 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:39:35,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-09 10:39:35,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 114. [2021-11-09 10:39:35,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.201834862385321) internal successors, (131), 113 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:35,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2021-11-09 10:39:35,783 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 29 [2021-11-09 10:39:35,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:39:35,783 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2021-11-09 10:39:35,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:35,784 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2021-11-09 10:39:35,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 10:39:35,785 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:39:35,785 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:39:35,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 10:39:36,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 10:39:36,011 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:39:36,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:39:36,011 INFO L85 PathProgramCache]: Analyzing trace with hash -855526903, now seen corresponding path program 1 times [2021-11-09 10:39:36,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:39:36,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582809613] [2021-11-09 10:39:36,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:36,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:39:36,028 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:39:36,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182246556] [2021-11-09 10:39:36,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:36,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:36,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:39:36,037 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:39:36,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 10:39:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:39:36,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 10:39:36,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:39:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:39:36,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:39:36,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582809613] [2021-11-09 10:39:36,996 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:39:36,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182246556] [2021-11-09 10:39:36,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182246556] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:39:36,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:39:36,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 10:39:36,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69042043] [2021-11-09 10:39:36,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:39:36,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:39:36,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:39:37,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:39:37,000 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:37,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:39:37,271 INFO L93 Difference]: Finished difference Result 142 states and 160 transitions. [2021-11-09 10:39:37,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:39:37,271 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-09 10:39:37,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:39:37,272 INFO L225 Difference]: With dead ends: 142 [2021-11-09 10:39:37,272 INFO L226 Difference]: Without dead ends: 140 [2021-11-09 10:39:37,273 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:39:37,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-09 10:39:37,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 114. [2021-11-09 10:39:37,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.1926605504587156) internal successors, (130), 113 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:37,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 130 transitions. [2021-11-09 10:39:37,288 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 130 transitions. Word has length 31 [2021-11-09 10:39:37,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:39:37,288 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 130 transitions. [2021-11-09 10:39:37,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:37,289 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 130 transitions. [2021-11-09 10:39:37,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 10:39:37,290 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:39:37,290 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:39:37,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 10:39:37,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:37,519 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:39:37,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:39:37,519 INFO L85 PathProgramCache]: Analyzing trace with hash 155590347, now seen corresponding path program 2 times [2021-11-09 10:39:37,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:39:37,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423949311] [2021-11-09 10:39:37,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:37,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:39:37,534 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:39:37,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078729680] [2021-11-09 10:39:37,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:39:37,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:37,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:39:37,551 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:39:37,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 10:39:37,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:39:37,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:39:37,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-09 10:39:37,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:39:38,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:39:38,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:39:38,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423949311] [2021-11-09 10:39:38,623 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:39:38,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078729680] [2021-11-09 10:39:38,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078729680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:39:38,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:39:38,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-09 10:39:38,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511806567] [2021-11-09 10:39:38,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:39:38,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:39:38,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:39:38,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:39:38,626 INFO L87 Difference]: Start difference. First operand 114 states and 130 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:39,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:39:39,072 INFO L93 Difference]: Finished difference Result 148 states and 166 transitions. [2021-11-09 10:39:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:39:39,072 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-09 10:39:39,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:39:39,074 INFO L225 Difference]: With dead ends: 148 [2021-11-09 10:39:39,074 INFO L226 Difference]: Without dead ends: 146 [2021-11-09 10:39:39,075 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-11-09 10:39:39,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-09 10:39:39,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 118. [2021-11-09 10:39:39,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.1858407079646018) internal successors, (134), 117 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 134 transitions. [2021-11-09 10:39:39,092 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 134 transitions. Word has length 31 [2021-11-09 10:39:39,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:39:39,093 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 134 transitions. [2021-11-09 10:39:39,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:39,093 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 134 transitions. [2021-11-09 10:39:39,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 10:39:39,094 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:39:39,094 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:39:39,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 10:39:39,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 10:39:39,323 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:39:39,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:39:39,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1663177194, now seen corresponding path program 2 times [2021-11-09 10:39:39,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:39:39,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440387712] [2021-11-09 10:39:39,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:39,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:39:39,338 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:39:39,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894614558] [2021-11-09 10:39:39,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:39:39,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:39,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:39:39,340 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:39:39,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 10:39:39,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:39:39,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:39:39,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 10:39:39,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:39:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:39:40,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:39:40,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440387712] [2021-11-09 10:39:40,361 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:39:40,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894614558] [2021-11-09 10:39:40,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894614558] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:39:40,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:39:40,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 10:39:40,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474919836] [2021-11-09 10:39:40,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:39:40,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:39:40,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:39:40,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:39:40,364 INFO L87 Difference]: Start difference. First operand 118 states and 134 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 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) [2021-11-09 10:39:40,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:39:40,621 INFO L93 Difference]: Finished difference Result 160 states and 180 transitions. [2021-11-09 10:39:40,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 10:39:40,622 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-09 10:39:40,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:39:40,623 INFO L225 Difference]: With dead ends: 160 [2021-11-09 10:39:40,625 INFO L226 Difference]: Without dead ends: 148 [2021-11-09 10:39:40,626 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:39:40,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-09 10:39:40,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 126. [2021-11-09 10:39:40,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.1818181818181819) internal successors, (143), 125 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:40,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 143 transitions. [2021-11-09 10:39:40,655 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 143 transitions. Word has length 33 [2021-11-09 10:39:40,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:39:40,656 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 143 transitions. [2021-11-09 10:39:40,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 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) [2021-11-09 10:39:40,656 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 143 transitions. [2021-11-09 10:39:40,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 10:39:40,657 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:39:40,657 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:39:40,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 10:39:40,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 10:39:40,863 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:39:40,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:39:40,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1610721748, now seen corresponding path program 1 times [2021-11-09 10:39:40,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:39:40,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82309737] [2021-11-09 10:39:40,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:40,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:39:40,877 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:39:40,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [672974487] [2021-11-09 10:39:40,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:40,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:40,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:39:40,879 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:39:40,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 10:39:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:39:41,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-09 10:39:41,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:39:42,220 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:39:42,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:39:42,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82309737] [2021-11-09 10:39:42,221 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:39:42,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672974487] [2021-11-09 10:39:42,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672974487] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:39:42,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:39:42,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-09 10:39:42,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177463019] [2021-11-09 10:39:42,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 10:39:42,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:39:42,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 10:39:42,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:39:42,224 INFO L87 Difference]: Start difference. First operand 126 states and 143 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 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) [2021-11-09 10:39:42,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:39:42,661 INFO L93 Difference]: Finished difference Result 162 states and 181 transitions. [2021-11-09 10:39:42,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 10:39:42,661 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-09 10:39:42,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:39:42,663 INFO L225 Difference]: With dead ends: 162 [2021-11-09 10:39:42,663 INFO L226 Difference]: Without dead ends: 148 [2021-11-09 10:39:42,663 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:39:42,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-09 10:39:42,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 119. [2021-11-09 10:39:42,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 118 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:42,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 134 transitions. [2021-11-09 10:39:42,678 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 134 transitions. Word has length 33 [2021-11-09 10:39:42,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:39:42,678 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 134 transitions. [2021-11-09 10:39:42,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 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) [2021-11-09 10:39:42,679 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 134 transitions. [2021-11-09 10:39:42,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 10:39:42,679 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:39:42,680 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:39:42,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 10:39:42,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 10:39:42,900 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:39:42,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:39:42,900 INFO L85 PathProgramCache]: Analyzing trace with hash 130855945, now seen corresponding path program 3 times [2021-11-09 10:39:42,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:39:42,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024605359] [2021-11-09 10:39:42,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:42,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:39:42,911 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:39:42,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150196630] [2021-11-09 10:39:42,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:39:42,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:42,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:39:42,913 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:39:42,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 10:39:43,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 10:39:43,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:39:43,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 10:39:43,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:39:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 10:39:44,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:39:44,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024605359] [2021-11-09 10:39:44,315 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:39:44,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150196630] [2021-11-09 10:39:44,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150196630] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:39:44,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:39:44,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-09 10:39:44,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239935932] [2021-11-09 10:39:44,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 10:39:44,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:39:44,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 10:39:44,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:39:44,318 INFO L87 Difference]: Start difference. First operand 119 states and 134 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:46,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:39:46,243 INFO L93 Difference]: Finished difference Result 172 states and 190 transitions. [2021-11-09 10:39:46,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:39:46,243 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 10:39:46,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:39:46,244 INFO L225 Difference]: With dead ends: 172 [2021-11-09 10:39:46,245 INFO L226 Difference]: Without dead ends: 162 [2021-11-09 10:39:46,245 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-11-09 10:39:46,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-09 10:39:46,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 130. [2021-11-09 10:39:46,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.192) internal successors, (149), 129 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:46,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 149 transitions. [2021-11-09 10:39:46,276 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 149 transitions. Word has length 37 [2021-11-09 10:39:46,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:39:46,276 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 149 transitions. [2021-11-09 10:39:46,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:46,277 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 149 transitions. [2021-11-09 10:39:46,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 10:39:46,277 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:39:46,278 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:39:46,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 10:39:46,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 10:39:46,491 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:39:46,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:39:46,492 INFO L85 PathProgramCache]: Analyzing trace with hash -127249911, now seen corresponding path program 4 times [2021-11-09 10:39:46,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:39:46,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043152027] [2021-11-09 10:39:46,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:46,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:39:46,504 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:39:46,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978722132] [2021-11-09 10:39:46,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:39:46,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:46,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:39:46,506 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:39:46,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 10:39:46,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:39:46,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:39:46,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 10:39:46,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:39:47,362 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:39:47,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:39:47,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043152027] [2021-11-09 10:39:47,363 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:39:47,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978722132] [2021-11-09 10:39:47,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978722132] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:39:47,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:39:47,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 10:39:47,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350231877] [2021-11-09 10:39:47,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:39:47,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:39:47,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:39:47,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:39:47,366 INFO L87 Difference]: Start difference. First operand 130 states and 149 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:47,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:39:47,763 INFO L93 Difference]: Finished difference Result 162 states and 183 transitions. [2021-11-09 10:39:47,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:39:47,764 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 10:39:47,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:39:47,765 INFO L225 Difference]: With dead ends: 162 [2021-11-09 10:39:47,765 INFO L226 Difference]: Without dead ends: 158 [2021-11-09 10:39:47,766 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:39:47,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-09 10:39:47,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 142. [2021-11-09 10:39:47,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.1824817518248176) internal successors, (162), 141 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:47,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 162 transitions. [2021-11-09 10:39:47,798 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 162 transitions. Word has length 37 [2021-11-09 10:39:47,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:39:47,798 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 162 transitions. [2021-11-09 10:39:47,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:47,799 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 162 transitions. [2021-11-09 10:39:47,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 10:39:47,799 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:39:47,799 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:39:47,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 10:39:48,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 10:39:48,015 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:39:48,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:39:48,015 INFO L85 PathProgramCache]: Analyzing trace with hash -127309493, now seen corresponding path program 5 times [2021-11-09 10:39:48,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:39:48,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111461704] [2021-11-09 10:39:48,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:48,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:39:48,032 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:39:48,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286524570] [2021-11-09 10:39:48,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:39:48,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:48,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:39:48,045 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:39:48,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 10:39:49,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 10:39:49,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:39:49,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 10:39:49,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:39:50,002 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:39:50,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:39:50,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111461704] [2021-11-09 10:39:50,003 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:39:50,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286524570] [2021-11-09 10:39:50,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286524570] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:39:50,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:39:50,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 10:39:50,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370716675] [2021-11-09 10:39:50,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:39:50,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:39:50,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:39:50,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:39:50,006 INFO L87 Difference]: Start difference. First operand 142 states and 162 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:50,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:39:50,305 INFO L93 Difference]: Finished difference Result 162 states and 183 transitions. [2021-11-09 10:39:50,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:39:50,305 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 10:39:50,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:39:50,307 INFO L225 Difference]: With dead ends: 162 [2021-11-09 10:39:50,307 INFO L226 Difference]: Without dead ends: 152 [2021-11-09 10:39:50,307 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:39:50,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-09 10:39:50,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 142. [2021-11-09 10:39:50,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.1824817518248176) internal successors, (162), 141 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:50,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 162 transitions. [2021-11-09 10:39:50,331 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 162 transitions. Word has length 37 [2021-11-09 10:39:50,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:39:50,332 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 162 transitions. [2021-11-09 10:39:50,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:50,332 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 162 transitions. [2021-11-09 10:39:50,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 10:39:50,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:39:50,333 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:39:50,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 10:39:50,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 10:39:50,541 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:39:50,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:39:50,541 INFO L85 PathProgramCache]: Analyzing trace with hash 948563977, now seen corresponding path program 6 times [2021-11-09 10:39:50,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:39:50,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750454024] [2021-11-09 10:39:50,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:50,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:39:50,553 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:39:50,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496975444] [2021-11-09 10:39:50,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:39:50,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:50,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:39:50,555 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:39:50,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 10:39:51,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-09 10:39:51,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:39:51,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 10:39:51,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:39:51,590 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:39:51,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:39:51,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750454024] [2021-11-09 10:39:51,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:39:51,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496975444] [2021-11-09 10:39:51,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496975444] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:39:51,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:39:51,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 10:39:51,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637272120] [2021-11-09 10:39:51,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:39:51,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:39:51,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:39:51,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:39:51,593 INFO L87 Difference]: Start difference. First operand 142 states and 162 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:51,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:39:51,886 INFO L93 Difference]: Finished difference Result 170 states and 192 transitions. [2021-11-09 10:39:51,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:39:51,887 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 10:39:51,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:39:51,889 INFO L225 Difference]: With dead ends: 170 [2021-11-09 10:39:51,889 INFO L226 Difference]: Without dead ends: 166 [2021-11-09 10:39:51,890 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:39:51,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-09 10:39:51,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 146. [2021-11-09 10:39:51,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.1843971631205674) internal successors, (167), 145 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:51,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 167 transitions. [2021-11-09 10:39:51,921 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 167 transitions. Word has length 37 [2021-11-09 10:39:51,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:39:51,921 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 167 transitions. [2021-11-09 10:39:51,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:51,922 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 167 transitions. [2021-11-09 10:39:51,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 10:39:51,923 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:39:51,923 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:39:51,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 10:39:52,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:52,139 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:39:52,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:39:52,139 INFO L85 PathProgramCache]: Analyzing trace with hash 948504395, now seen corresponding path program 7 times [2021-11-09 10:39:52,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:39:52,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855076503] [2021-11-09 10:39:52,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:52,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:39:52,159 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:39:52,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433195217] [2021-11-09 10:39:52,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:39:52,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:52,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:39:52,161 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:39:52,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 10:39:52,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:39:52,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 10:39:52,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:39:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:39:53,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:39:53,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855076503] [2021-11-09 10:39:53,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:39:53,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433195217] [2021-11-09 10:39:53,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433195217] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:39:53,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:39:53,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 10:39:53,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957235332] [2021-11-09 10:39:53,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:39:53,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:39:53,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:39:53,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:39:53,320 INFO L87 Difference]: Start difference. First operand 146 states and 167 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:53,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:39:53,604 INFO L93 Difference]: Finished difference Result 166 states and 188 transitions. [2021-11-09 10:39:53,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:39:53,604 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 10:39:53,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:39:53,605 INFO L225 Difference]: With dead ends: 166 [2021-11-09 10:39:53,605 INFO L226 Difference]: Without dead ends: 156 [2021-11-09 10:39:53,606 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:39:53,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-09 10:39:53,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 138. [2021-11-09 10:39:53,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.1879699248120301) internal successors, (158), 137 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:53,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 158 transitions. [2021-11-09 10:39:53,655 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 158 transitions. Word has length 37 [2021-11-09 10:39:53,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:39:53,656 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 158 transitions. [2021-11-09 10:39:53,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:53,656 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 158 transitions. [2021-11-09 10:39:53,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 10:39:53,657 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:39:53,657 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:39:53,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 10:39:53,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:53,871 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:39:53,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:39:53,871 INFO L85 PathProgramCache]: Analyzing trace with hash 690398539, now seen corresponding path program 8 times [2021-11-09 10:39:53,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:39:53,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010285689] [2021-11-09 10:39:53,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:53,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:39:53,881 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:39:53,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767774842] [2021-11-09 10:39:53,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:39:53,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:53,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:39:53,883 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:39:53,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 10:39:54,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:39:54,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:39:54,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 10:39:54,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:39:54,875 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:39:54,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:39:54,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010285689] [2021-11-09 10:39:54,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:39:54,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767774842] [2021-11-09 10:39:54,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767774842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:39:54,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:39:54,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 10:39:54,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077344055] [2021-11-09 10:39:54,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:39:54,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:39:54,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:39:54,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:39:54,878 INFO L87 Difference]: Start difference. First operand 138 states and 158 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:55,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:39:55,162 INFO L93 Difference]: Finished difference Result 166 states and 188 transitions. [2021-11-09 10:39:55,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:39:55,163 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 10:39:55,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:39:55,164 INFO L225 Difference]: With dead ends: 166 [2021-11-09 10:39:55,164 INFO L226 Difference]: Without dead ends: 162 [2021-11-09 10:39:55,164 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:39:55,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-09 10:39:55,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 142. [2021-11-09 10:39:55,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.1897810218978102) internal successors, (163), 141 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:55,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 163 transitions. [2021-11-09 10:39:55,192 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 163 transitions. Word has length 37 [2021-11-09 10:39:55,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:39:55,193 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 163 transitions. [2021-11-09 10:39:55,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:55,193 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 163 transitions. [2021-11-09 10:39:55,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 10:39:55,194 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:39:55,194 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:39:55,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 10:39:55,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-09 10:39:55,399 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:39:55,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:39:55,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1198667980, now seen corresponding path program 2 times [2021-11-09 10:39:55,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:39:55,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580928800] [2021-11-09 10:39:55,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:55,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:39:55,412 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:39:55,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1954177351] [2021-11-09 10:39:55,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:39:55,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:55,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:39:55,414 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:39:55,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 10:39:56,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:39:56,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:39:56,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 10:39:56,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:39:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:39:56,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:39:56,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580928800] [2021-11-09 10:39:56,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:39:56,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954177351] [2021-11-09 10:39:56,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954177351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:39:56,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:39:56,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-09 10:39:56,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451786688] [2021-11-09 10:39:56,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 10:39:56,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:39:56,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 10:39:56,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:39:56,781 INFO L87 Difference]: Start difference. First operand 142 states and 163 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:57,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:39:57,647 INFO L93 Difference]: Finished difference Result 177 states and 200 transitions. [2021-11-09 10:39:57,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:39:57,647 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-09 10:39:57,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:39:57,649 INFO L225 Difference]: With dead ends: 177 [2021-11-09 10:39:57,649 INFO L226 Difference]: Without dead ends: 175 [2021-11-09 10:39:57,649 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:39:57,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-09 10:39:57,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 146. [2021-11-09 10:39:57,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.1843971631205674) internal successors, (167), 145 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:57,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 167 transitions. [2021-11-09 10:39:57,681 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 167 transitions. Word has length 39 [2021-11-09 10:39:57,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:39:57,682 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 167 transitions. [2021-11-09 10:39:57,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:39:57,682 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 167 transitions. [2021-11-09 10:39:57,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 10:39:57,683 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:39:57,683 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:39:57,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-09 10:39:57,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:57,907 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:39:57,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:39:57,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2085182066, now seen corresponding path program 3 times [2021-11-09 10:39:57,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:39:57,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750695596] [2021-11-09 10:39:57,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:57,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:39:57,921 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:39:57,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845825526] [2021-11-09 10:39:57,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:39:57,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:39:57,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:39:57,923 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:39:57,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 10:39:58,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 10:39:58,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:39:58,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 10:39:58,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:39:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-09 10:39:58,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:39:58,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750695596] [2021-11-09 10:39:58,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:39:58,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845825526] [2021-11-09 10:39:58,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845825526] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:39:58,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:39:58,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 10:39:58,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319763916] [2021-11-09 10:39:58,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:39:58,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:39:58,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:39:58,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:39:58,973 INFO L87 Difference]: Start difference. First operand 146 states and 167 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:00,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:00,271 INFO L93 Difference]: Finished difference Result 146 states and 167 transitions. [2021-11-09 10:40:00,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:40:00,272 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-09 10:40:00,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:00,273 INFO L225 Difference]: With dead ends: 146 [2021-11-09 10:40:00,274 INFO L226 Difference]: Without dead ends: 132 [2021-11-09 10:40:00,274 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:40:00,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-09 10:40:00,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 91. [2021-11-09 10:40:00,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 89 states have (on average 1.1123595505617978) internal successors, (99), 90 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:00,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2021-11-09 10:40:00,299 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 39 [2021-11-09 10:40:00,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:00,300 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2021-11-09 10:40:00,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:00,300 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2021-11-09 10:40:00,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 10:40:00,301 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:00,301 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:00,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:00,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 10:40:00,503 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:40:00,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:00,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1388479860, now seen corresponding path program 9 times [2021-11-09 10:40:00,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:00,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519244396] [2021-11-09 10:40:00,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:00,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:00,548 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:40:00,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977608576] [2021-11-09 10:40:00,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:40:00,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:00,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:00,550 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:00,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 10:40:01,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 10:40:01,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:01,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 10:40:01,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-09 10:40:02,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:02,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519244396] [2021-11-09 10:40:02,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:40:02,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977608576] [2021-11-09 10:40:02,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977608576] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:02,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:40:02,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-09 10:40:02,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31633968] [2021-11-09 10:40:02,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 10:40:02,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:02,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 10:40:02,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:40:02,067 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:03,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:03,409 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2021-11-09 10:40:03,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:40:03,409 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 10:40:03,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:03,410 INFO L225 Difference]: With dead ends: 134 [2021-11-09 10:40:03,410 INFO L226 Difference]: Without dead ends: 124 [2021-11-09 10:40:03,411 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:40:03,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-09 10:40:03,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99. [2021-11-09 10:40:03,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 97 states have (on average 1.1134020618556701) internal successors, (108), 98 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) [2021-11-09 10:40:03,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2021-11-09 10:40:03,438 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 45 [2021-11-09 10:40:03,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:03,438 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2021-11-09 10:40:03,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:03,439 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2021-11-09 10:40:03,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 10:40:03,439 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:03,440 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:03,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:03,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 10:40:03,651 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:40:03,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:03,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1388539442, now seen corresponding path program 10 times [2021-11-09 10:40:03,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:03,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599315491] [2021-11-09 10:40:03,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:03,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:03,664 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:40:03,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [872278575] [2021-11-09 10:40:03,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:40:03,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:03,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:03,672 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:03,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 10:40:04,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:40:04,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:04,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 10:40:04,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:05,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:05,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599315491] [2021-11-09 10:40:05,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:40:05,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872278575] [2021-11-09 10:40:05,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872278575] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:05,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:40:05,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-09 10:40:05,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172166403] [2021-11-09 10:40:05,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:40:05,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:05,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:40:05,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:40:05,123 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:05,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:05,520 INFO L93 Difference]: Finished difference Result 133 states and 145 transitions. [2021-11-09 10:40:05,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:40:05,521 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 10:40:05,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:05,522 INFO L225 Difference]: With dead ends: 133 [2021-11-09 10:40:05,522 INFO L226 Difference]: Without dead ends: 123 [2021-11-09 10:40:05,523 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:40:05,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-09 10:40:05,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 107. [2021-11-09 10:40:05,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 105 states have (on average 1.1142857142857143) internal successors, (117), 106 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:05,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2021-11-09 10:40:05,557 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 45 [2021-11-09 10:40:05,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:05,557 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2021-11-09 10:40:05,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:05,558 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2021-11-09 10:40:05,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 10:40:05,558 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:05,559 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:05,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:05,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 10:40:05,775 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:40:05,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:05,775 INFO L85 PathProgramCache]: Analyzing trace with hash -312665972, now seen corresponding path program 11 times [2021-11-09 10:40:05,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:05,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705088665] [2021-11-09 10:40:05,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:05,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:05,805 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:40:05,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337788438] [2021-11-09 10:40:05,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:40:05,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:05,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:05,811 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:05,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 10:40:07,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 10:40:07,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:07,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 10:40:07,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:07,951 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:07,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:07,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705088665] [2021-11-09 10:40:07,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:40:07,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337788438] [2021-11-09 10:40:07,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337788438] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:07,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:40:07,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-09 10:40:07,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163683724] [2021-11-09 10:40:07,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:40:07,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:07,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:40:07,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:40:07,954 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:08,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:08,288 INFO L93 Difference]: Finished difference Result 141 states and 154 transitions. [2021-11-09 10:40:08,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:40:08,289 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 10:40:08,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:08,290 INFO L225 Difference]: With dead ends: 141 [2021-11-09 10:40:08,290 INFO L226 Difference]: Without dead ends: 131 [2021-11-09 10:40:08,291 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:40:08,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-09 10:40:08,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 115. [2021-11-09 10:40:08,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 113 states have (on average 1.1150442477876106) internal successors, (126), 114 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:08,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2021-11-09 10:40:08,317 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 45 [2021-11-09 10:40:08,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:08,317 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2021-11-09 10:40:08,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:08,318 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2021-11-09 10:40:08,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 10:40:08,319 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:08,319 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:08,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:08,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 10:40:08,529 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:40:08,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:08,530 INFO L85 PathProgramCache]: Analyzing trace with hash -312725554, now seen corresponding path program 12 times [2021-11-09 10:40:08,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:08,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033988557] [2021-11-09 10:40:08,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:08,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:08,561 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:40:08,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [872544832] [2021-11-09 10:40:08,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:40:08,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:08,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:08,563 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:08,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 10:40:09,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 10:40:09,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:09,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 10:40:09,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:10,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:10,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033988557] [2021-11-09 10:40:10,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:40:10,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872544832] [2021-11-09 10:40:10,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872544832] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:10,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:40:10,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-09 10:40:10,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699270967] [2021-11-09 10:40:10,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:40:10,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:10,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:40:10,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:40:10,112 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:10,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:10,497 INFO L93 Difference]: Finished difference Result 141 states and 154 transitions. [2021-11-09 10:40:10,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:40:10,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 10:40:10,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:10,499 INFO L225 Difference]: With dead ends: 141 [2021-11-09 10:40:10,500 INFO L226 Difference]: Without dead ends: 131 [2021-11-09 10:40:10,500 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:40:10,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-09 10:40:10,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 115. [2021-11-09 10:40:10,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 113 states have (on average 1.1150442477876106) internal successors, (126), 114 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:10,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2021-11-09 10:40:10,551 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 45 [2021-11-09 10:40:10,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:10,552 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2021-11-09 10:40:10,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:10,552 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2021-11-09 10:40:10,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 10:40:10,553 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:10,553 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:10,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:10,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 10:40:10,767 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:40:10,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:10,767 INFO L85 PathProgramCache]: Analyzing trace with hash -570831410, now seen corresponding path program 13 times [2021-11-09 10:40:10,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:10,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170508101] [2021-11-09 10:40:10,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:10,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:10,790 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:40:10,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867178403] [2021-11-09 10:40:10,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:40:10,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:10,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:10,792 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:10,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 10:40:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:11,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 10:40:11,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:12,451 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:12,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:12,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170508101] [2021-11-09 10:40:12,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:40:12,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867178403] [2021-11-09 10:40:12,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867178403] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:12,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:40:12,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-09 10:40:12,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133504753] [2021-11-09 10:40:12,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:40:12,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:12,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:40:12,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:40:12,454 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:12,987 INFO L93 Difference]: Finished difference Result 141 states and 154 transitions. [2021-11-09 10:40:12,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:40:12,987 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 10:40:12,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:12,989 INFO L225 Difference]: With dead ends: 141 [2021-11-09 10:40:12,989 INFO L226 Difference]: Without dead ends: 131 [2021-11-09 10:40:12,990 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:40:12,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-09 10:40:13,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 115. [2021-11-09 10:40:13,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 113 states have (on average 1.1150442477876106) internal successors, (126), 114 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:13,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2021-11-09 10:40:13,054 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 45 [2021-11-09 10:40:13,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:13,055 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2021-11-09 10:40:13,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:13,056 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2021-11-09 10:40:13,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 10:40:13,056 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:13,057 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:13,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:13,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 10:40:13,272 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:40:13,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:13,273 INFO L85 PathProgramCache]: Analyzing trace with hash -570890992, now seen corresponding path program 14 times [2021-11-09 10:40:13,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:13,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510797425] [2021-11-09 10:40:13,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:13,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:13,291 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:40:13,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060194180] [2021-11-09 10:40:13,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:40:13,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:13,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:13,295 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:13,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 10:40:14,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:40:14,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:14,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 10:40:14,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:14,922 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:14,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:14,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510797425] [2021-11-09 10:40:14,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:40:14,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060194180] [2021-11-09 10:40:14,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060194180] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:14,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:40:14,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-09 10:40:14,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682486190] [2021-11-09 10:40:14,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:40:14,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:14,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:40:14,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:40:14,925 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:15,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:15,186 INFO L93 Difference]: Finished difference Result 141 states and 154 transitions. [2021-11-09 10:40:15,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:40:15,187 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 10:40:15,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:15,188 INFO L225 Difference]: With dead ends: 141 [2021-11-09 10:40:15,189 INFO L226 Difference]: Without dead ends: 131 [2021-11-09 10:40:15,189 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:40:15,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-09 10:40:15,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 115. [2021-11-09 10:40:15,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 113 states have (on average 1.1150442477876106) internal successors, (126), 114 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:15,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2021-11-09 10:40:15,239 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 45 [2021-11-09 10:40:15,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:15,239 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2021-11-09 10:40:15,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:15,240 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2021-11-09 10:40:15,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 10:40:15,241 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:15,241 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:15,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:15,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 10:40:15,467 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 10:40:15,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:15,467 INFO L85 PathProgramCache]: Analyzing trace with hash -620841332, now seen corresponding path program 15 times [2021-11-09 10:40:15,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:15,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378909247] [2021-11-09 10:40:15,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:15,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:15,491 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:40:15,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985212229] [2021-11-09 10:40:15,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:40:15,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:15,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:15,493 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:15,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 10:40:16,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 10:40:16,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:16,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 10:40:16,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 33 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-09 10:40:17,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:17,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378909247] [2021-11-09 10:40:17,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:40:17,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985212229] [2021-11-09 10:40:17,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985212229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:17,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:40:17,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-09 10:40:17,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020849628] [2021-11-09 10:40:17,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 10:40:17,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:17,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 10:40:17,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:40:17,147 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:32,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:32,115 INFO L93 Difference]: Finished difference Result 144 states and 159 transitions. [2021-11-09 10:40:32,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 10:40:32,115 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 10:40:32,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:32,116 INFO L225 Difference]: With dead ends: 144 [2021-11-09 10:40:32,116 INFO L226 Difference]: Without dead ends: 0 [2021-11-09 10:40:32,117 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-11-09 10:40:32,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-09 10:40:32,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-09 10:40:32,118 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) [2021-11-09 10:40:32,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-09 10:40:32,118 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2021-11-09 10:40:32,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:32,119 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-09 10:40:32,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:32,119 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-09 10:40:32,120 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-09 10:40:32,123 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 10:40:32,123 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 10:40:32,123 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 10:40:32,124 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 10:40:32,124 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 10:40:32,124 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 10:40:32,124 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 10:40:32,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:32,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:32,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-09 10:40:32,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 10:40:32,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 10:40:32,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 10:40:32,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 10:40:33,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 10:40:33,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 10:40:33,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 10:40:33,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 10:40:34,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 10:40:40,314 WARN L207 SmtUtils]: Spent 5.94 s on a formula simplification. DAG size of input: 148 DAG size of output: 33 [2021-11-09 10:40:55,054 WARN L207 SmtUtils]: Spent 14.74 s on a formula simplification. DAG size of input: 206 DAG size of output: 33 [2021-11-09 10:41:07,622 WARN L207 SmtUtils]: Spent 10.03 s on a formula simplification. DAG size of input: 200 DAG size of output: 33 [2021-11-09 10:41:22,167 WARN L207 SmtUtils]: Spent 14.54 s on a formula simplification. DAG size of input: 190 DAG size of output: 34 [2021-11-09 10:41:44,288 WARN L207 SmtUtils]: Spent 22.12 s on a formula simplification. DAG size of input: 182 DAG size of output: 43 [2021-11-09 10:41:58,805 WARN L207 SmtUtils]: Spent 14.51 s on a formula simplification. DAG size of input: 213 DAG size of output: 33 [2021-11-09 10:41:58,808 INFO L857 garLoopResultBuilder]: For program point L35-2(lines 35 52) no Hoare annotation was computed. [2021-11-09 10:41:58,808 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-11-09 10:41:58,808 INFO L857 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-11-09 10:41:58,809 INFO L853 garLoopResultBuilder]: At program point L11-2(lines 10 16) the Hoare annotation is: (and (= (+ (* ULTIMATE.start_main_~s~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~x~0)) ULTIMATE.start_main_~b~0) (= ULTIMATE.start_assume_abort_if_not_~cond 1) (= (+ (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~r~0) 1) (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~s~0)) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= ULTIMATE.start_main_~x~0 20) (<= 1 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 20) (<= 1 ULTIMATE.start_main_~x~0) (= ULTIMATE.start_main_~a~0 (+ (* ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~x~0)))) [2021-11-09 10:41:58,809 INFO L857 garLoopResultBuilder]: For program point L11-3(lines 11 14) no Hoare annotation was computed. [2021-11-09 10:41:58,809 INFO L853 garLoopResultBuilder]: At program point L11-5(lines 10 16) the Hoare annotation is: (and (= (+ (* ULTIMATE.start_main_~s~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~x~0)) ULTIMATE.start_main_~b~0) (= ULTIMATE.start_assume_abort_if_not_~cond 1) (= (+ (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~r~0) 1) (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~s~0)) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= ULTIMATE.start_main_~x~0 20) (<= 1 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 20) (<= 1 ULTIMATE.start_main_~x~0) (= ULTIMATE.start_main_~a~0 (+ (* ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~x~0)))) [2021-11-09 10:41:58,809 INFO L857 garLoopResultBuilder]: For program point L11-6(lines 11 14) no Hoare annotation was computed. [2021-11-09 10:41:58,809 INFO L853 garLoopResultBuilder]: At program point L11-8(lines 40 41) the Hoare annotation is: (let ((.cse0 (* ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0)) (.cse1 (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~x~0))) (and (= (+ ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0) (+ .cse0 (* ULTIMATE.start_main_~s~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~x~0) .cse1)) (= ULTIMATE.start_assume_abort_if_not_~cond 1) (= (+ (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~r~0) 1) (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~s~0)) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= ULTIMATE.start_main_~x~0 20) (<= 1 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 20) (<= 1 ULTIMATE.start_main_~x~0) (= ULTIMATE.start_main_~a~0 (+ .cse0 .cse1)))) [2021-11-09 10:41:58,809 INFO L857 garLoopResultBuilder]: For program point L11-9(lines 11 14) no Hoare annotation was computed. [2021-11-09 10:41:58,810 INFO L853 garLoopResultBuilder]: At program point L11-11(lines 10 16) the Hoare annotation is: (and (= (+ (* ULTIMATE.start_main_~s~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~x~0)) ULTIMATE.start_main_~b~0) (= ULTIMATE.start_assume_abort_if_not_~cond 1) (= (+ (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~r~0) 1) (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~s~0)) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= ULTIMATE.start_main_~x~0 20) (<= 1 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 20) (<= 1 ULTIMATE.start_main_~x~0) (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0) (= ULTIMATE.start_main_~b~0 (+ (* ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~x~0)))) [2021-11-09 10:41:58,810 INFO L857 garLoopResultBuilder]: For program point L11-12(lines 11 14) no Hoare annotation was computed. [2021-11-09 10:41:58,810 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-11-09 10:41:58,810 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-09 10:41:58,811 INFO L853 garLoopResultBuilder]: At program point L11-14(lines 10 16) the Hoare annotation is: (let ((.cse5 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0)) (.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse6 (= ULTIMATE.start_main_~p~0 1)) (.cse1 (<= ULTIMATE.start_main_~x~0 20)) (.cse2 (<= 1 ULTIMATE.start_main_~y~0)) (.cse7 (= ULTIMATE.start_main_~q~0 0)) (.cse3 (<= ULTIMATE.start_main_~y~0 20)) (.cse8 (= ULTIMATE.start_main_~s~0 1)) (.cse4 (<= 1 ULTIMATE.start_main_~x~0)) (.cse9 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0))) (or (and (= (+ (* ULTIMATE.start_main_~s~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~x~0)) ULTIMATE.start_main_~b~0) .cse0 (= (+ (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~r~0) 1) (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~s~0)) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse1 .cse2 .cse3 .cse4 .cse5 (= ULTIMATE.start_main_~b~0 (+ (* ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~x~0)))) (and .cse0 .cse6 .cse1 .cse2 .cse7 .cse3 .cse8 .cse4 .cse5 .cse9) (and .cse0 (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~x~0) .cse6 .cse1 .cse2 .cse7 .cse3 (= ULTIMATE.start_main_~r~0 0) .cse8 .cse4 .cse9))) [2021-11-09 10:41:58,811 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-09 10:41:58,811 INFO L857 garLoopResultBuilder]: For program point L11-15(lines 11 14) no Hoare annotation was computed. [2021-11-09 10:41:58,811 INFO L853 garLoopResultBuilder]: At program point L11-17(lines 10 16) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (<= ULTIMATE.start_main_~x~0 20)) (.cse2 (<= 1 ULTIMATE.start_main_~y~0)) (.cse3 (<= ULTIMATE.start_main_~y~0 20)) (.cse4 (<= 1 ULTIMATE.start_main_~x~0))) (or (and (= (+ (* ULTIMATE.start_main_~s~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~x~0)) ULTIMATE.start_main_~b~0) .cse0 .cse1 .cse2 .cse3 .cse4 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0) (= ULTIMATE.start_main_~b~0 (+ (* ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~x~0)))) (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~q~0 0) .cse3 (= ULTIMATE.start_main_~s~0 1) .cse4 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)))) [2021-11-09 10:41:58,811 INFO L857 garLoopResultBuilder]: For program point L11-18(lines 11 14) no Hoare annotation was computed. [2021-11-09 10:41:58,812 INFO L860 garLoopResultBuilder]: At program point L11-20(lines 10 16) the Hoare annotation is: true [2021-11-09 10:41:58,812 INFO L857 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-11-09 10:41:58,812 INFO L857 garLoopResultBuilder]: For program point L12-1(lines 12 13) no Hoare annotation was computed. [2021-11-09 10:41:58,812 INFO L857 garLoopResultBuilder]: For program point L12-2(lines 12 13) no Hoare annotation was computed. [2021-11-09 10:41:58,812 INFO L857 garLoopResultBuilder]: For program point L12-3(lines 12 13) no Hoare annotation was computed. [2021-11-09 10:41:58,813 INFO L857 garLoopResultBuilder]: For program point L12-4(lines 12 13) no Hoare annotation was computed. [2021-11-09 10:41:58,813 INFO L857 garLoopResultBuilder]: For program point L12-5(lines 12 13) no Hoare annotation was computed. [2021-11-09 10:41:58,813 INFO L857 garLoopResultBuilder]: For program point L12-6(lines 12 13) no Hoare annotation was computed. [2021-11-09 10:41:58,813 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-11-09 10:41:58,813 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-11-09 10:41:58,814 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-11-09 10:41:58,814 INFO L857 garLoopResultBuilder]: For program point L7(lines 7 9) no Hoare annotation was computed. [2021-11-09 10:41:58,814 INFO L857 garLoopResultBuilder]: For program point L7-1(lines 7 9) no Hoare annotation was computed. [2021-11-09 10:41:58,814 INFO L857 garLoopResultBuilder]: For program point L7-2(lines 7 9) no Hoare annotation was computed. [2021-11-09 10:41:58,815 INFO L857 garLoopResultBuilder]: For program point L7-3(lines 7 9) no Hoare annotation was computed. [2021-11-09 10:41:58,815 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-09 10:41:58,815 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-11-09 10:41:58,815 INFO L857 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-11-09 10:41:58,815 INFO L857 garLoopResultBuilder]: For program point L8-2(line 8) no Hoare annotation was computed. [2021-11-09 10:41:58,816 INFO L857 garLoopResultBuilder]: For program point L8-4(line 8) no Hoare annotation was computed. [2021-11-09 10:41:58,816 INFO L857 garLoopResultBuilder]: For program point L8-6(line 8) no Hoare annotation was computed. [2021-11-09 10:41:58,816 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-09 10:41:58,816 INFO L860 garLoopResultBuilder]: At program point L58(lines 18 59) the Hoare annotation is: true [2021-11-09 10:41:58,816 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-11-09 10:41:58,817 INFO L857 garLoopResultBuilder]: For program point L43(lines 43 51) no Hoare annotation was computed. [2021-11-09 10:41:58,817 INFO L853 garLoopResultBuilder]: At program point L43-2(lines 35 52) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (<= ULTIMATE.start_main_~x~0 20)) (.cse2 (<= 1 ULTIMATE.start_main_~y~0)) (.cse3 (<= ULTIMATE.start_main_~y~0 20)) (.cse4 (<= 1 ULTIMATE.start_main_~x~0)) (.cse5 (= ULTIMATE.start_main_~a~0 (+ (* ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~x~0))))) (or (and (= (+ (* ULTIMATE.start_main_~s~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~x~0)) ULTIMATE.start_main_~b~0) .cse0 (= (+ (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~r~0) 1) (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~s~0)) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse1 .cse2 .cse3 .cse4 .cse5) (and .cse0 (= ULTIMATE.start_main_~p~0 1) .cse1 .cse2 (= ULTIMATE.start_main_~q~0 0) .cse3 (= ULTIMATE.start_main_~r~0 0) (= ULTIMATE.start_main_~s~0 1) .cse4 .cse5 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)))) [2021-11-09 10:41:58,821 INFO L731 BasicCegarLoop]: Path program histogram: [15, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:41:58,823 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-09 10:41:58,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 10:41:58 BoogieIcfgContainer [2021-11-09 10:41:58,879 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-09 10:41:58,887 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-09 10:41:58,887 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-09 10:41:58,887 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-09 10:41:58,888 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:39:27" (3/4) ... [2021-11-09 10:41:58,891 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-09 10:41:58,908 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2021-11-09 10:41:58,909 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-09 10:41:58,909 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-09 10:41:58,909 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-09 10:41:58,959 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/witness.graphml [2021-11-09 10:41:58,960 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-09 10:41:58,961 INFO L168 Benchmark]: Toolchain (without parser) took 152249.10 ms. Allocated memory was 92.3 MB in the beginning and 299.9 MB in the end (delta: 207.6 MB). Free memory was 59.3 MB in the beginning and 82.5 MB in the end (delta: -23.2 MB). Peak memory consumption was 183.1 MB. Max. memory is 16.1 GB. [2021-11-09 10:41:58,961 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 92.3 MB. Free memory is still 46.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 10:41:58,962 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.81 ms. Allocated memory was 92.3 MB in the beginning and 117.4 MB in the end (delta: 25.2 MB). Free memory was 59.0 MB in the beginning and 91.8 MB in the end (delta: -32.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-09 10:41:58,962 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.20 ms. Allocated memory is still 117.4 MB. Free memory was 91.8 MB in the beginning and 90.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 10:41:58,962 INFO L168 Benchmark]: Boogie Preprocessor took 27.41 ms. Allocated memory is still 117.4 MB. Free memory was 90.4 MB in the beginning and 89.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 10:41:58,963 INFO L168 Benchmark]: RCFGBuilder took 349.54 ms. Allocated memory is still 117.4 MB. Free memory was 88.6 MB in the beginning and 77.2 MB in the end (delta: 11.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-09 10:41:58,963 INFO L168 Benchmark]: TraceAbstraction took 151484.83 ms. Allocated memory was 117.4 MB in the beginning and 299.9 MB in the end (delta: 182.5 MB). Free memory was 77.2 MB in the beginning and 85.6 MB in the end (delta: -8.5 MB). Peak memory consumption was 190.6 MB. Max. memory is 16.1 GB. [2021-11-09 10:41:58,964 INFO L168 Benchmark]: Witness Printer took 73.27 ms. Allocated memory is still 299.9 MB. Free memory was 85.6 MB in the beginning and 82.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 10:41:58,967 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 92.3 MB. Free memory is still 46.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 260.81 ms. Allocated memory was 92.3 MB in the beginning and 117.4 MB in the end (delta: 25.2 MB). Free memory was 59.0 MB in the beginning and 91.8 MB in the end (delta: -32.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.20 ms. Allocated memory is still 117.4 MB. Free memory was 91.8 MB in the beginning and 90.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.41 ms. Allocated memory is still 117.4 MB. Free memory was 90.4 MB in the beginning and 89.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 349.54 ms. Allocated memory is still 117.4 MB. Free memory was 88.6 MB in the beginning and 77.2 MB in the end (delta: 11.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 151484.83 ms. Allocated memory was 117.4 MB in the beginning and 299.9 MB in the end (delta: 182.5 MB). Free memory was 77.2 MB in the beginning and 85.6 MB in the end (delta: -8.5 MB). Peak memory consumption was 190.6 MB. Max. memory is 16.1 GB. * Witness Printer took 73.27 ms. Allocated memory is still 299.9 MB. Free memory was 85.6 MB in the beginning and 82.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 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: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: 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, 44 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 151.3s, OverallIterations: 30, TraceHistogramMax: 5, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 26.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 86.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1027 SDtfs, 1299 SDslu, 3190 SDs, 0 SdLazy, 4199 SolverSat, 391 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 22.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1046 GetRequests, 776 SyntacticMatches, 2 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=146occurred in iteration=19, InterpolantAutomatonStates: 268, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 30 MinimizatonAttempts, 493 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 9 PreInvPairs, 112 NumberOfFragments, 462 HoareAnnotationTreeSize, 9 FomulaSimplifications, 1513472 FormulaSimplificationTreeSizeReduction, 2.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 507842 FormulaSimplificationTreeSizeReductionInter, 84.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 14.5s InterpolantComputationTime, 970 NumberOfCodeBlocks, 908 NumberOfCodeBlocksAsserted, 57 NumberOfCheckSat, 940 ConstructedInterpolants, 2 QuantifiedInterpolants, 10972 SizeOfPredicates, 235 NumberOfNonLiveVariables, 3661 ConjunctsInSsa, 720 ConjunctsInUnsatCore, 30 InterpolantComputations, 6 PerfectInterpolantSequences, 129/752 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 7 specifications checked. All of them hold - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: (((((((s * y + q * x == b && cond == 1) && x <= 20) && 1 <= y) && y <= 20) && 1 <= x) && b == a) && b == r * y + p * x) || (((((((cond == 1 && x <= 20) && 1 <= y) && q == 0) && y <= 20) && s == 1) && 1 <= x) && b == y) - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: (((((((s * y + q * x == b && cond == 1) && q * r + 1 == p * s) && 1 == cond) && x <= 20) && 1 <= y) && y <= 20) && 1 <= x) && a == r * y + p * x - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((((((s * y + q * x == b && cond == 1) && q * r + 1 == p * s) && 1 == cond) && x <= 20) && 1 <= y) && y <= 20) && 1 <= x) && a == r * y + p * x) || ((((((((((cond == 1 && p == 1) && x <= 20) && 1 <= y) && q == 0) && y <= 20) && r == 0) && s == 1) && 1 <= x) && a == r * y + p * x) && b == y) - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: (((((((b + a == r * y + s * y + q * x + p * x && cond == 1) && q * r + 1 == p * s) && 1 == cond) && x <= 20) && 1 <= y) && y <= 20) && 1 <= x) && a == r * y + p * x - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: ((((((((s * y + q * x == b && cond == 1) && q * r + 1 == p * s) && 1 == cond) && x <= 20) && 1 <= y) && y <= 20) && 1 <= x) && b == a) && b == r * y + p * x - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: ((((((((((s * y + q * x == b && cond == 1) && q * r + 1 == p * s) && 1 == cond) && x <= 20) && 1 <= y) && y <= 20) && 1 <= x) && b == a) && b == r * y + p * x) || (((((((((cond == 1 && p == 1) && x <= 20) && 1 <= y) && q == 0) && y <= 20) && s == 1) && 1 <= x) && b == a) && b == y)) || ((((((((((cond == 1 && a == x) && p == 1) && x <= 20) && 1 <= y) && q == 0) && y <= 20) && r == 0) && s == 1) && 1 <= x) && b == y) - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: (((((((s * y + q * x == b && cond == 1) && q * r + 1 == p * s) && 1 == cond) && x <= 20) && 1 <= y) && y <= 20) && 1 <= x) && a == r * y + p * x RESULT: Ultimate proved your program to be correct! [2021-11-09 10:41:59,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d66362-7f6e-4d48-b3e6-7180faab8b5c/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE