./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7f97a505fe6488215cf15708661c3a7c87a5132fbff317a4b6f7f9cc44d66008 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:40:16,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:40:16,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:40:16,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:40:16,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:40:16,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:40:16,935 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:40:16,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:40:16,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:40:16,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:40:16,950 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:40:16,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:40:16,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:40:16,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:40:16,970 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:40:16,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:40:16,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:40:16,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:40:16,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:40:16,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:40:17,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:40:17,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:40:17,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:40:17,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:40:17,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:40:17,018 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:40:17,019 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:40:17,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:40:17,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:40:17,025 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:40:17,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:40:17,027 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:40:17,030 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:40:17,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:40:17,034 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:40:17,035 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:40:17,036 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:40:17,037 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:40:17,037 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:40:17,038 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:40:17,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:40:17,041 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 23:40:17,104 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:40:17,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:40:17,105 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:40:17,106 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:40:17,115 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:40:17,115 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:40:17,116 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:40:17,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:40:17,117 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:40:17,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:40:17,119 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:40:17,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:40:17,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 23:40:17,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:40:17,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 23:40:17,120 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:40:17,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:40:17,121 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:40:17,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 23:40:17,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:40:17,122 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:40:17,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:40:17,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:40:17,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:40:17,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:40:17,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 23:40:17,124 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:40:17,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:40:17,125 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 23:40:17,127 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 23:40:17,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 23:40:17,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:40:17,129 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_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f97a505fe6488215cf15708661c3a7c87a5132fbff317a4b6f7f9cc44d66008 [2021-10-28 23:40:17,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:40:17,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:40:17,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:40:17,513 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:40:17,514 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:40:17,516 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound5.c [2021-10-28 23:40:17,611 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/data/000332221/54326dee9c1d48f482389d6b155c7803/FLAGf4c431bdc [2021-10-28 23:40:18,342 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:40:18,349 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound5.c [2021-10-28 23:40:18,368 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/data/000332221/54326dee9c1d48f482389d6b155c7803/FLAGf4c431bdc [2021-10-28 23:40:18,658 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/data/000332221/54326dee9c1d48f482389d6b155c7803 [2021-10-28 23:40:18,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:40:18,664 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:40:18,666 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:40:18,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:40:18,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:40:18,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:40:18" (1/1) ... [2021-10-28 23:40:18,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73cb01d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:40:18, skipping insertion in model container [2021-10-28 23:40:18,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:40:18" (1/1) ... [2021-10-28 23:40:18,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:40:18,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:40:18,940 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_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound5.c[535,548] [2021-10-28 23:40:18,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:40:18,979 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:40:18,995 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_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound5.c[535,548] [2021-10-28 23:40:19,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:40:19,026 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:40:19,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:40:19 WrapperNode [2021-10-28 23:40:19,027 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:40:19,029 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:40:19,029 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:40:19,029 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:40:19,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:40:19" (1/1) ... [2021-10-28 23:40:19,050 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:40:19" (1/1) ... [2021-10-28 23:40:19,082 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:40:19,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:40:19,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:40:19,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:40:19,095 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:40:19" (1/1) ... [2021-10-28 23:40:19,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:40:19" (1/1) ... [2021-10-28 23:40:19,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:40:19" (1/1) ... [2021-10-28 23:40:19,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:40:19" (1/1) ... [2021-10-28 23:40:19,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:40:19" (1/1) ... [2021-10-28 23:40:19,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:40:19" (1/1) ... [2021-10-28 23:40:19,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:40:19" (1/1) ... [2021-10-28 23:40:19,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:40:19,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:40:19,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:40:19,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:40:19,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:40:19" (1/1) ... [2021-10-28 23:40:19,147 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:40:19,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:19,195 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:40:19,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:40:19,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:40:19,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:40:19,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:40:19,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:40:19,578 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:40:19,579 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-10-28 23:40:19,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:40:19 BoogieIcfgContainer [2021-10-28 23:40:19,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:40:19,600 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:40:19,600 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:40:19,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:40:19,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:40:18" (1/3) ... [2021-10-28 23:40:19,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d197610 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:40:19, skipping insertion in model container [2021-10-28 23:40:19,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:40:19" (2/3) ... [2021-10-28 23:40:19,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d197610 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:40:19, skipping insertion in model container [2021-10-28 23:40:19,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:40:19" (3/3) ... [2021-10-28 23:40:19,624 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound5.c [2021-10-28 23:40:19,648 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:40:19,648 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-10-28 23:40:19,716 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:40:19,725 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 23:40:19,725 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-28 23:40:19,745 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 31 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:19,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 23:40:19,752 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:19,753 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:19,754 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:40:19,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:19,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1233832305, now seen corresponding path program 1 times [2021-10-28 23:40:19,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:19,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627219134] [2021-10-28 23:40:19,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:19,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:20,014 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:40:20,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128117793] [2021-10-28 23:40:20,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:20,018 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:20,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:20,028 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:20,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:40:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:20,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-28 23:40:20,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:40:20,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:20,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627219134] [2021-10-28 23:40:20,279 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:40:20,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128117793] [2021-10-28 23:40:20,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128117793] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:40:20,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:40:20,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 23:40:20,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887649859] [2021-10-28 23:40:20,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 23:40:20,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:20,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 23:40:20,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:40:20,337 INFO L87 Difference]: Start difference. First operand has 32 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 31 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:20,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:20,387 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2021-10-28 23:40:20,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 23:40:20,390 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-28 23:40:20,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:20,404 INFO L225 Difference]: With dead ends: 61 [2021-10-28 23:40:20,404 INFO L226 Difference]: Without dead ends: 28 [2021-10-28 23:40:20,409 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:40:20,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-28 23:40:20,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-28 23:40:20,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.375) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:20,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-28 23:40:20,460 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 10 [2021-10-28 23:40:20,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:20,461 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-28 23:40:20,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:20,461 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-28 23:40:20,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 23:40:20,463 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:20,463 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:20,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:20,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-28 23:40:20,680 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:40:20,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:20,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2021-10-28 23:40:20,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:20,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973607437] [2021-10-28 23:40:20,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:20,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:20,726 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:40:20,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16918251] [2021-10-28 23:40:20,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:20,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:20,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:20,729 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:20,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:40:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:20,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 23:40:20,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:21,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:40:21,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:21,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973607437] [2021-10-28 23:40:21,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:40:21,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16918251] [2021-10-28 23:40:21,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16918251] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:40:21,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:40:21,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:40:21,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620371007] [2021-10-28 23:40:21,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:40:21,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:21,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:40:21,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:40:21,253 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:30,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:30,110 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2021-10-28 23:40:30,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:40:30,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-28 23:40:30,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:30,113 INFO L225 Difference]: With dead ends: 54 [2021-10-28 23:40:30,113 INFO L226 Difference]: Without dead ends: 50 [2021-10-28 23:40:30,115 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:40:30,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-28 23:40:30,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2021-10-28 23:40:30,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.411764705882353) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-10-28 23:40:30,134 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 10 [2021-10-28 23:40:30,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:30,137 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-10-28 23:40:30,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:30,138 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-10-28 23:40:30,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 23:40:30,140 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:30,141 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:30,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:30,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:30,364 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:40:30,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:30,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1507375428, now seen corresponding path program 1 times [2021-10-28 23:40:30,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:30,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864861269] [2021-10-28 23:40:30,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:30,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:30,389 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:40:30,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384745557] [2021-10-28 23:40:30,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:30,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:30,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:30,398 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:30,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:40:30,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:30,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 23:40:30,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:40:30,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:30,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864861269] [2021-10-28 23:40:30,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:40:30,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384745557] [2021-10-28 23:40:30,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384745557] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:40:30,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:40:30,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:40:30,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119682561] [2021-10-28 23:40:30,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:40:30,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:30,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:40:30,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:40:30,576 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:30,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:30,604 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-10-28 23:40:30,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:40:30,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-28 23:40:30,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:30,608 INFO L225 Difference]: With dead ends: 44 [2021-10-28 23:40:30,608 INFO L226 Difference]: Without dead ends: 40 [2021-10-28 23:40:30,609 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:40:30,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-28 23:40:30,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-10-28 23:40:30,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 39 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:30,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-10-28 23:40:30,621 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 11 [2021-10-28 23:40:30,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:30,621 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-10-28 23:40:30,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:30,622 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-10-28 23:40:30,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:40:30,623 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:30,623 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:30,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:30,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:30,844 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:40:30,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:30,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1189409771, now seen corresponding path program 1 times [2021-10-28 23:40:30,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:30,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425850799] [2021-10-28 23:40:30,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:30,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:30,861 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:40:30,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076893679] [2021-10-28 23:40:30,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:30,862 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:30,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:30,864 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:30,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:40:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:30,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 23:40:30,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:40:31,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:31,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425850799] [2021-10-28 23:40:31,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:40:31,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076893679] [2021-10-28 23:40:31,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076893679] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:40:31,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:40:31,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 23:40:31,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990567656] [2021-10-28 23:40:31,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:40:31,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:31,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:40:31,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:40:31,197 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:31,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:31,458 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-10-28 23:40:31,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:40:31,458 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-28 23:40:31,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:31,460 INFO L225 Difference]: With dead ends: 44 [2021-10-28 23:40:31,460 INFO L226 Difference]: Without dead ends: 34 [2021-10-28 23:40:31,461 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:40:31,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-28 23:40:31,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2021-10-28 23:40:31,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:31,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-10-28 23:40:31,470 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 13 [2021-10-28 23:40:31,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:31,471 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-10-28 23:40:31,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:31,471 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-10-28 23:40:31,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 23:40:31,472 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:31,473 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:31,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:31,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:31,687 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:40:31,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:31,688 INFO L85 PathProgramCache]: Analyzing trace with hash -112841942, now seen corresponding path program 1 times [2021-10-28 23:40:31,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:31,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466443485] [2021-10-28 23:40:31,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:31,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:31,704 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:40:31,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455339658] [2021-10-28 23:40:31,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:31,705 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:31,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:31,706 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:31,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 23:40:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:31,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 23:40:31,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:31,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:40:31,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:31,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466443485] [2021-10-28 23:40:31,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:40:31,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455339658] [2021-10-28 23:40:31,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455339658] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:40:31,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:40:31,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:40:31,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876143239] [2021-10-28 23:40:31,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:40:31,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:31,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:40:31,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:40:31,927 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:31,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:31,957 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-10-28 23:40:31,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:40:31,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-28 23:40:31,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:31,960 INFO L225 Difference]: With dead ends: 44 [2021-10-28 23:40:31,960 INFO L226 Difference]: Without dead ends: 28 [2021-10-28 23:40:31,961 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:40:31,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-28 23:40:31,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-28 23:40:31,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:31,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-10-28 23:40:31,969 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2021-10-28 23:40:31,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:31,969 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-10-28 23:40:31,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:31,970 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-10-28 23:40:31,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 23:40:31,971 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:31,971 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] [2021-10-28 23:40:32,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:32,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:32,188 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:40:32,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:32,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1045325853, now seen corresponding path program 1 times [2021-10-28 23:40:32,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:32,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302516924] [2021-10-28 23:40:32,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:32,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:32,203 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:40:32,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [390067109] [2021-10-28 23:40:32,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:32,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:32,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:32,205 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:32,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 23:40:32,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:32,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:40:32,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:32,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:40:32,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:32,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302516924] [2021-10-28 23:40:32,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:40:32,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390067109] [2021-10-28 23:40:32,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390067109] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:40:32,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:40:32,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:40:32,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929153407] [2021-10-28 23:40:32,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:40:32,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:32,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:40:32,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:40:32,497 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:32,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:32,536 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2021-10-28 23:40:32,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:40:32,537 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-28 23:40:32,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:32,538 INFO L225 Difference]: With dead ends: 49 [2021-10-28 23:40:32,538 INFO L226 Difference]: Without dead ends: 33 [2021-10-28 23:40:32,539 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:40:32,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-28 23:40:32,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-10-28 23:40:32,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:32,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-10-28 23:40:32,549 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 21 [2021-10-28 23:40:32,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:32,550 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-10-28 23:40:32,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:32,551 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-10-28 23:40:32,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 23:40:32,560 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:32,561 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, 1, 1] [2021-10-28 23:40:32,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:32,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:32,762 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:40:32,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:32,763 INFO L85 PathProgramCache]: Analyzing trace with hash -944107012, now seen corresponding path program 1 times [2021-10-28 23:40:32,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:32,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912022710] [2021-10-28 23:40:32,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:32,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:32,779 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:40:32,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [527735783] [2021-10-28 23:40:32,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:32,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:32,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:32,782 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:32,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 23:40:32,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:32,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 23:40:32,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:40:33,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:33,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912022710] [2021-10-28 23:40:33,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:40:33,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527735783] [2021-10-28 23:40:33,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527735783] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:40:33,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:40:33,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:40:33,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250842743] [2021-10-28 23:40:33,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:40:33,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:33,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:40:33,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:40:33,070 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:33,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:33,167 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2021-10-28 23:40:33,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:40:33,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-28 23:40:33,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:33,170 INFO L225 Difference]: With dead ends: 80 [2021-10-28 23:40:33,171 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 23:40:33,171 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:40:33,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 23:40:33,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2021-10-28 23:40:33,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:33,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2021-10-28 23:40:33,189 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 23 [2021-10-28 23:40:33,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:33,190 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2021-10-28 23:40:33,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:33,190 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2021-10-28 23:40:33,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 23:40:33,192 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:33,192 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:33,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:33,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-28 23:40:33,414 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:40:33,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:33,415 INFO L85 PathProgramCache]: Analyzing trace with hash 2135520830, now seen corresponding path program 1 times [2021-10-28 23:40:33,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:33,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236987537] [2021-10-28 23:40:33,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:33,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:33,429 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:40:33,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007386663] [2021-10-28 23:40:33,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:33,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:33,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:33,431 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:33,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 23:40:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:33,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:40:33,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:40:33,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:33,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236987537] [2021-10-28 23:40:33,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:40:33,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007386663] [2021-10-28 23:40:33,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007386663] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:33,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:40:33,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-28 23:40:33,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86992706] [2021-10-28 23:40:33,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:40:33,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:33,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:40:33,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:40:33,703 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:33,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:33,762 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2021-10-28 23:40:33,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:40:33,764 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-28 23:40:33,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:33,765 INFO L225 Difference]: With dead ends: 82 [2021-10-28 23:40:33,765 INFO L226 Difference]: Without dead ends: 50 [2021-10-28 23:40:33,766 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:40:33,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-28 23:40:33,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-10-28 23:40:33,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:33,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-10-28 23:40:33,781 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 23 [2021-10-28 23:40:33,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:33,781 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-10-28 23:40:33,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:33,782 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-10-28 23:40:33,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-28 23:40:33,783 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:33,784 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:33,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:34,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:34,008 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:40:34,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:34,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1539131849, now seen corresponding path program 1 times [2021-10-28 23:40:34,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:34,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657779749] [2021-10-28 23:40:34,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:34,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:34,022 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:40:34,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [275038520] [2021-10-28 23:40:34,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:34,023 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:34,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:34,024 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:34,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 23:40:34,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:34,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 23:40:34,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:40:34,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:34,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657779749] [2021-10-28 23:40:34,324 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:40:34,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275038520] [2021-10-28 23:40:34,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275038520] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:34,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:40:34,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 23:40:34,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77060337] [2021-10-28 23:40:34,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:40:34,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:34,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:40:34,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:40:34,328 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:34,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:34,393 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2021-10-28 23:40:34,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:40:34,394 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-28 23:40:34,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:34,396 INFO L225 Difference]: With dead ends: 89 [2021-10-28 23:40:34,396 INFO L226 Difference]: Without dead ends: 57 [2021-10-28 23:40:34,397 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:40:34,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-28 23:40:34,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-10-28 23:40:34,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:34,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2021-10-28 23:40:34,411 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 25 [2021-10-28 23:40:34,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:34,412 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2021-10-28 23:40:34,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:34,413 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2021-10-28 23:40:34,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 23:40:34,414 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:34,414 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:34,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:34,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-28 23:40:34,616 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:40:34,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:34,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1249700688, now seen corresponding path program 1 times [2021-10-28 23:40:34,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:34,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430309752] [2021-10-28 23:40:34,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:34,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:34,630 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:40:34,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096187823] [2021-10-28 23:40:34,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:34,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:34,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:34,632 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:34,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 23:40:34,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:34,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:40:34,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:34,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:40:34,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:34,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430309752] [2021-10-28 23:40:34,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:40:34,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096187823] [2021-10-28 23:40:34,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096187823] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:34,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:40:34,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 23:40:34,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430514751] [2021-10-28 23:40:34,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:40:34,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:34,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:40:34,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:40:34,948 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:35,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:35,007 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2021-10-28 23:40:35,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:40:35,008 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-28 23:40:35,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:35,009 INFO L225 Difference]: With dead ends: 70 [2021-10-28 23:40:35,010 INFO L226 Difference]: Without dead ends: 66 [2021-10-28 23:40:35,010 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:40:35,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-28 23:40:35,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-10-28 23:40:35,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:35,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2021-10-28 23:40:35,026 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 27 [2021-10-28 23:40:35,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:35,034 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2021-10-28 23:40:35,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:35,035 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2021-10-28 23:40:35,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 23:40:35,039 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:35,039 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:35,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:35,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:35,258 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:40:35,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:35,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1841895250, now seen corresponding path program 2 times [2021-10-28 23:40:35,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:35,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545270132] [2021-10-28 23:40:35,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:35,260 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:35,271 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:40:35,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [838742763] [2021-10-28 23:40:35,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:40:35,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:35,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:35,274 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:35,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 23:40:35,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:40:35,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:40:35,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 23:40:35,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:40:35,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:35,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545270132] [2021-10-28 23:40:35,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:40:35,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838742763] [2021-10-28 23:40:35,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838742763] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:35,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:40:35,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 23:40:35,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967326454] [2021-10-28 23:40:35,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:40:35,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:35,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:40:35,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:40:35,792 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:35,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:35,861 INFO L93 Difference]: Finished difference Result 94 states and 116 transitions. [2021-10-28 23:40:35,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:40:35,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-28 23:40:35,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:35,863 INFO L225 Difference]: With dead ends: 94 [2021-10-28 23:40:35,863 INFO L226 Difference]: Without dead ends: 62 [2021-10-28 23:40:35,864 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:40:35,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-28 23:40:35,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-28 23:40:35,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 61 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:35,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2021-10-28 23:40:35,879 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 27 [2021-10-28 23:40:35,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:35,880 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2021-10-28 23:40:35,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:35,880 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2021-10-28 23:40:35,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 23:40:35,881 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:35,882 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:35,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:36,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:36,094 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:40:36,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:36,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2118874485, now seen corresponding path program 2 times [2021-10-28 23:40:36,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:36,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80523831] [2021-10-28 23:40:36,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:36,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:36,108 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:40:36,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1004153769] [2021-10-28 23:40:36,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:40:36,109 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:36,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:36,110 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:36,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 23:40:36,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:40:36,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:40:36,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:40:36,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:40:36,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:36,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80523831] [2021-10-28 23:40:36,470 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:40:36,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004153769] [2021-10-28 23:40:36,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004153769] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:36,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:40:36,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 23:40:36,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345626982] [2021-10-28 23:40:36,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:40:36,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:36,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:40:36,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:40:36,472 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:36,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:36,553 INFO L93 Difference]: Finished difference Result 99 states and 122 transitions. [2021-10-28 23:40:36,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:40:36,554 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-28 23:40:36,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:36,556 INFO L225 Difference]: With dead ends: 99 [2021-10-28 23:40:36,556 INFO L226 Difference]: Without dead ends: 67 [2021-10-28 23:40:36,557 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:40:36,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-28 23:40:36,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2021-10-28 23:40:36,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:36,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2021-10-28 23:40:36,573 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 29 [2021-10-28 23:40:36,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:36,574 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2021-10-28 23:40:36,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:40:36,574 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2021-10-28 23:40:36,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 23:40:36,576 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:36,576 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:36,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:36,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 23:40:36,804 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-28 23:40:36,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:36,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1832191324, now seen corresponding path program 2 times [2021-10-28 23:40:36,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:36,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5702347] [2021-10-28 23:40:36,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:36,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:36,817 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:40:36,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532985744] [2021-10-28 23:40:36,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:40:36,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:36,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:36,820 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:36,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 23:40:37,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:40:37,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-28 23:40:37,031 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:40:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:40:37,110 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:40:37,111 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 23:40:37,111 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:40:37,113 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:40:37,114 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:40:37,114 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:40:37,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-28 23:40:37,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 23:40:37,332 INFO L731 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:37,338 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:40:37,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:40:37 BoogieIcfgContainer [2021-10-28 23:40:37,407 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:40:37,408 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:40:37,408 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:40:37,408 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:40:37,409 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:40:19" (3/4) ... [2021-10-28 23:40:37,417 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 23:40:37,522 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:40:37,522 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:40:37,524 INFO L168 Benchmark]: Toolchain (without parser) took 18859.32 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 70.0 MB in the beginning and 36.2 MB in the end (delta: 33.8 MB). Peak memory consumption was 53.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:40:37,525 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 102.8 MB. Free memory was 59.2 MB in the beginning and 59.1 MB in the end (delta: 76.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:40:37,525 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.86 ms. Allocated memory is still 102.8 MB. Free memory was 69.8 MB in the beginning and 78.0 MB in the end (delta: -8.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:40:37,525 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.77 ms. Allocated memory is still 102.8 MB. Free memory was 78.0 MB in the beginning and 76.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:40:37,526 INFO L168 Benchmark]: Boogie Preprocessor took 42.27 ms. Allocated memory is still 102.8 MB. Free memory was 76.2 MB in the beginning and 75.2 MB in the end (delta: 944.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:40:37,526 INFO L168 Benchmark]: RCFGBuilder took 455.59 ms. Allocated memory is still 102.8 MB. Free memory was 75.2 MB in the beginning and 64.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:40:37,527 INFO L168 Benchmark]: TraceAbstraction took 17807.07 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 63.6 MB in the beginning and 39.3 MB in the end (delta: 24.2 MB). Peak memory consumption was 48.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:40:37,527 INFO L168 Benchmark]: Witness Printer took 114.45 ms. Allocated memory is still 123.7 MB. Free memory was 39.3 MB in the beginning and 36.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:40:37,530 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 102.8 MB. Free memory was 59.2 MB in the beginning and 59.1 MB in the end (delta: 76.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 361.86 ms. Allocated memory is still 102.8 MB. Free memory was 69.8 MB in the beginning and 78.0 MB in the end (delta: -8.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.77 ms. Allocated memory is still 102.8 MB. Free memory was 78.0 MB in the beginning and 76.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.27 ms. Allocated memory is still 102.8 MB. Free memory was 76.2 MB in the beginning and 75.2 MB in the end (delta: 944.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 455.59 ms. Allocated memory is still 102.8 MB. Free memory was 75.2 MB in the beginning and 64.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 17807.07 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 63.6 MB in the beginning and 39.3 MB in the end (delta: 24.2 MB). Peak memory consumption was 48.1 MB. Max. memory is 16.1 GB. * Witness Printer took 114.45 ms. Allocated memory is still 123.7 MB. Free memory was 39.3 MB in the beginning and 36.2 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 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) VAL [counter=0] [L9] COND FALSE !(!cond) VAL [counter=0] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<5 [L12] COND FALSE !(!(cond)) VAL [counter=1] [L36] COND FALSE !(!(r != 0)) VAL [counter=1] [L39] EXPR counter++ VAL [counter=2] [L39] COND TRUE counter++<5 [L12] COND FALSE !(!(cond)) VAL [counter=2] [L41] COND TRUE !(r > 0) VAL [counter=2] [L47] EXPR counter++ VAL [counter=3] [L47] COND TRUE counter++<5 [L12] COND FALSE !(!(cond)) VAL [counter=3] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [counter=3] [L47] EXPR counter++ VAL [counter=4] [L47] COND TRUE counter++<5 [L12] COND FALSE !(!(cond)) VAL [counter=4] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [counter=4] [L47] EXPR counter++ VAL [counter=5] [L47] COND TRUE counter++<5 [L12] COND FALSE !(!(cond)) VAL [counter=5] [L49] COND TRUE !(r < 0) VAL [counter=5] [L34] EXPR counter++ VAL [counter=6] [L34] COND FALSE !(counter++<5) [L12] COND TRUE !(cond) VAL [counter=6] [L14] reach_error() VAL [counter=6] - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 17.6s, OverallIterations: 13, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 9.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 302 SDtfs, 246 SDslu, 560 SDs, 0 SdLazy, 254 SolverSat, 62 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 9.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 237 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=12, InterpolantAutomatonStates: 74, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 47 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 269 NumberOfCodeBlocks, 269 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 226 ConstructedInterpolants, 0 QuantifiedInterpolants, 680 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1146 ConjunctsInSsa, 89 ConjunctsInUnsatCore, 12 InterpolantComputations, 7 PerfectInterpolantSequences, 14/40 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-28 23:40:37,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac138f3c-6f6f-4a0e-b6db-40d4b25919a1/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...