./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa --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 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:29:16,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:29:16,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:29:16,088 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:29:16,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:29:16,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:29:16,091 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:29:16,093 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:29:16,094 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:29:16,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:29:16,096 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:29:16,097 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:29:16,097 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:29:16,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:29:16,099 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:29:16,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:29:16,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:29:16,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:29:16,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:29:16,105 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:29:16,107 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:29:16,108 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:29:16,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:29:16,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:29:16,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:29:16,113 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:29:16,113 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:29:16,114 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:29:16,114 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:29:16,115 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:29:16,115 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:29:16,116 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:29:16,117 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:29:16,117 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:29:16,118 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:29:16,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:29:16,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:29:16,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:29:16,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:29:16,120 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:29:16,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:29:16,122 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 19:29:16,139 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:29:16,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:29:16,140 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:29:16,140 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:29:16,141 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:29:16,141 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:29:16,141 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:29:16,141 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:29:16,141 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:29:16,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:29:16,142 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:29:16,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:29:16,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:29:16,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:29:16,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:29:16,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:29:16,142 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:29:16,142 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:29:16,143 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:29:16,143 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:29:16,143 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:29:16,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:29:16,143 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:29:16,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:29:16,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:29:16,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:29:16,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:29:16,144 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:29:16,144 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:29:16,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:29:16,144 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:29:16,144 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:29:16,144 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:29:16,144 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:29:16,144 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_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 [2021-12-06 19:29:16,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:29:16,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:29:16,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:29:16,339 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:29:16,340 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:29:16,341 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2021-12-06 19:29:16,383 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/data/b21050490/38f133908beb434a82e416c86f7a4762/FLAGf80eaf679 [2021-12-06 19:29:16,702 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:29:16,702 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2021-12-06 19:29:16,708 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/data/b21050490/38f133908beb434a82e416c86f7a4762/FLAGf80eaf679 [2021-12-06 19:29:17,115 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/data/b21050490/38f133908beb434a82e416c86f7a4762 [2021-12-06 19:29:17,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:29:17,118 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:29:17,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:29:17,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:29:17,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:29:17,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:29:17" (1/1) ... [2021-12-06 19:29:17,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e02fc08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:29:17, skipping insertion in model container [2021-12-06 19:29:17,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:29:17" (1/1) ... [2021-12-06 19:29:17,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:29:17,142 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:29:17,257 WARN L230 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_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2021-12-06 19:29:17,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:29:17,281 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:29:17,290 WARN L230 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_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2021-12-06 19:29:17,299 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:29:17,311 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:29:17,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:29:17 WrapperNode [2021-12-06 19:29:17,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:29:17,312 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:29:17,312 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:29:17,312 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:29:17,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:29:17" (1/1) ... [2021-12-06 19:29:17,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:29:17" (1/1) ... [2021-12-06 19:29:17,338 INFO L137 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2021-12-06 19:29:17,338 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:29:17,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:29:17,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:29:17,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:29:17,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:29:17" (1/1) ... [2021-12-06 19:29:17,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:29:17" (1/1) ... [2021-12-06 19:29:17,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:29:17" (1/1) ... [2021-12-06 19:29:17,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:29:17" (1/1) ... [2021-12-06 19:29:17,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:29:17" (1/1) ... [2021-12-06 19:29:17,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:29:17" (1/1) ... [2021-12-06 19:29:17,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:29:17" (1/1) ... [2021-12-06 19:29:17,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:29:17,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:29:17,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:29:17,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:29:17,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:29:17" (1/1) ... [2021-12-06 19:29:17,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:29:17,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:29:17,385 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:29:17,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:29:17,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:29:17,414 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 19:29:17,414 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 19:29:17,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:29:17,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:29:17,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:29:17,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 19:29:17,415 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 19:29:17,463 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:29:17,465 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:29:17,564 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:29:17,569 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:29:17,569 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 19:29:17,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:29:17 BoogieIcfgContainer [2021-12-06 19:29:17,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:29:17,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:29:17,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:29:17,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:29:17,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:29:17" (1/3) ... [2021-12-06 19:29:17,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a20d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:29:17, skipping insertion in model container [2021-12-06 19:29:17,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:29:17" (2/3) ... [2021-12-06 19:29:17,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a20d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:29:17, skipping insertion in model container [2021-12-06 19:29:17,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:29:17" (3/3) ... [2021-12-06 19:29:17,577 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound10.c [2021-12-06 19:29:17,581 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:29:17,581 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 19:29:17,617 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:29:17,622 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 [2021-12-06 19:29:17,622 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 19:29:17,635 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-06 19:29:17,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 19:29:17,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:29:17,641 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:29:17,641 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:29:17,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:29:17,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1146169762, now seen corresponding path program 1 times [2021-12-06 19:29:17,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:29:17,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408698855] [2021-12-06 19:29:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:17,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:29:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:29:17,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:29:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:29:17,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 19:29:17,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:29:17,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:29:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:29:17,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 19:29:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:29:17,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 19:29:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:29:17,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 19:29:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:29:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 19:29:17,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:29:17,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408698855] [2021-12-06 19:29:17,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408698855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:29:17,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:29:17,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:29:17,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291745093] [2021-12-06 19:29:17,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:29:17,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 19:29:17,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:29:17,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 19:29:17,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:29:17,845 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 19:29:17,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:29:17,863 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2021-12-06 19:29:17,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 19:29:17,865 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-12-06 19:29:17,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:29:17,870 INFO L225 Difference]: With dead ends: 67 [2021-12-06 19:29:17,870 INFO L226 Difference]: Without dead ends: 31 [2021-12-06 19:29:17,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:29:17,878 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:29:17,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:29:17,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-06 19:29:17,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-06 19:29:17,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 19:29:17,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-12-06 19:29:17,916 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2021-12-06 19:29:17,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:29:17,916 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-12-06 19:29:17,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 19:29:17,917 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-12-06 19:29:17,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 19:29:17,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:29:17,919 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:29:17,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:29:17,920 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:29:17,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:29:17,921 INFO L85 PathProgramCache]: Analyzing trace with hash 846808023, now seen corresponding path program 1 times [2021-12-06 19:29:17,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:29:17,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357739693] [2021-12-06 19:29:17,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:17,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:29:17,947 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:29:17,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878694372] [2021-12-06 19:29:17,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:17,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:29:17,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:29:17,949 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:29:17,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 19:29:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:29:18,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 19:29:18,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:29:18,139 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:29:18,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:29:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:29:18,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:29:18,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357739693] [2021-12-06 19:29:18,252 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:29:18,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878694372] [2021-12-06 19:29:18,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878694372] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:29:18,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:29:18,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-12-06 19:29:18,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792086695] [2021-12-06 19:29:18,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:29:18,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:29:18,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:29:18,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:29:18,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:29:18,256 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 19:29:18,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:29:18,334 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2021-12-06 19:29:18,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:29:18,334 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2021-12-06 19:29:18,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:29:18,336 INFO L225 Difference]: With dead ends: 48 [2021-12-06 19:29:18,336 INFO L226 Difference]: Without dead ends: 40 [2021-12-06 19:29:18,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:29:18,337 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 21 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:29:18,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 134 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:29:18,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-06 19:29:18,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-12-06 19:29:18,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 19:29:18,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2021-12-06 19:29:18,348 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 40 [2021-12-06 19:29:18,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:29:18,348 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2021-12-06 19:29:18,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 19:29:18,349 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2021-12-06 19:29:18,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 19:29:18,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:29:18,350 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:29:18,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:29:18,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-06 19:29:18,552 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:29:18,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:29:18,554 INFO L85 PathProgramCache]: Analyzing trace with hash 481927254, now seen corresponding path program 1 times [2021-12-06 19:29:18,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:29:18,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455960984] [2021-12-06 19:29:18,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:18,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:29:18,606 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:29:18,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420748515] [2021-12-06 19:29:18,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:18,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:29:18,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:29:18,611 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:29:18,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 19:29:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:29:18,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 19:29:18,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:29:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:29:18,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:29:18,876 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 19:29:18,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:29:18,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455960984] [2021-12-06 19:29:18,877 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:29:18,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420748515] [2021-12-06 19:29:18,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420748515] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 19:29:18,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:29:18,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-12-06 19:29:18,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162150428] [2021-12-06 19:29:18,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:29:18,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:29:18,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:29:18,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:29:18,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:29:18,879 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 19:29:18,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:29:18,922 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2021-12-06 19:29:18,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:29:18,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2021-12-06 19:29:18,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:29:18,924 INFO L225 Difference]: With dead ends: 39 [2021-12-06 19:29:18,924 INFO L226 Difference]: Without dead ends: 37 [2021-12-06 19:29:18,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:29:18,925 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:29:18,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 130 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:29:18,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-06 19:29:18,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-06 19:29:18,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 19:29:18,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-12-06 19:29:18,932 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 41 [2021-12-06 19:29:18,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:29:18,932 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-12-06 19:29:18,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 19:29:18,933 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-12-06 19:29:18,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 19:29:18,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:29:18,934 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:29:18,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 19:29:19,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:29:19,136 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:29:19,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:29:19,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1626076469, now seen corresponding path program 1 times [2021-12-06 19:29:19,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:29:19,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266187486] [2021-12-06 19:29:19,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:19,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:29:19,181 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:29:19,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203162788] [2021-12-06 19:29:19,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:19,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:29:19,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:29:19,184 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:29:19,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 19:29:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:29:19,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 19:29:19,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:29:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 19:29:19,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:29:19,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:29:19,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266187486] [2021-12-06 19:29:19,311 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:29:19,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203162788] [2021-12-06 19:29:19,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203162788] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:29:19,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:29:19,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:29:19,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000636044] [2021-12-06 19:29:19,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:29:19,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:29:19,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:29:19,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:29:19,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:29:19,314 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:29:19,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:29:19,344 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-12-06 19:29:19,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:29:19,345 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2021-12-06 19:29:19,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:29:19,346 INFO L225 Difference]: With dead ends: 50 [2021-12-06 19:29:19,346 INFO L226 Difference]: Without dead ends: 48 [2021-12-06 19:29:19,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:29:19,347 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 7 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:29:19,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 157 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:29:19,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-06 19:29:19,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-12-06 19:29:19,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-06 19:29:19,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2021-12-06 19:29:19,355 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 46 [2021-12-06 19:29:19,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:29:19,355 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2021-12-06 19:29:19,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:29:19,355 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2021-12-06 19:29:19,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 19:29:19,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:29:19,356 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:29:19,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 19:29:19,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:29:19,558 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:29:19,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:29:19,559 INFO L85 PathProgramCache]: Analyzing trace with hash 779090230, now seen corresponding path program 1 times [2021-12-06 19:29:19,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:29:19,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016070466] [2021-12-06 19:29:19,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:19,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:29:19,601 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:29:19,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170030066] [2021-12-06 19:29:19,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:19,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:29:19,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:29:19,605 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:29:19,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 19:29:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:29:19,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 19:29:19,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:29:19,819 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 19:29:19,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:29:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-06 19:29:19,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:29:19,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016070466] [2021-12-06 19:29:19,916 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:29:19,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170030066] [2021-12-06 19:29:19,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170030066] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 19:29:19,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:29:19,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-12-06 19:29:19,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199029593] [2021-12-06 19:29:19,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:29:19,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:29:19,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:29:19,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:29:19,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:29:19,918 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 19:29:19,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:29:19,954 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2021-12-06 19:29:19,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:29:19,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-12-06 19:29:19,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:29:19,956 INFO L225 Difference]: With dead ends: 54 [2021-12-06 19:29:19,956 INFO L226 Difference]: Without dead ends: 52 [2021-12-06 19:29:19,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:29:19,957 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:29:19,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 147 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:29:19,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-06 19:29:19,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-12-06 19:29:19,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-06 19:29:19,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2021-12-06 19:29:19,964 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 51 [2021-12-06 19:29:19,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:29:19,965 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2021-12-06 19:29:19,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 19:29:19,965 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2021-12-06 19:29:19,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 19:29:19,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:29:19,966 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:29:19,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 19:29:20,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:29:20,167 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:29:20,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:29:20,167 INFO L85 PathProgramCache]: Analyzing trace with hash -670274197, now seen corresponding path program 1 times [2021-12-06 19:29:20,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:29:20,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201289239] [2021-12-06 19:29:20,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:20,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:29:20,176 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:29:20,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361418769] [2021-12-06 19:29:20,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:20,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:29:20,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:29:20,178 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:29:20,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 19:29:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:29:20,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 19:29:20,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:29:20,353 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 19:29:20,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:29:20,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:29:20,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201289239] [2021-12-06 19:29:20,634 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:29:20,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361418769] [2021-12-06 19:29:20,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361418769] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:29:20,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:29:20,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-06 19:29:20,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669275524] [2021-12-06 19:29:20,635 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:29:20,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:29:20,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:29:20,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:29:20,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:29:20,636 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 19:29:20,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:29:20,713 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2021-12-06 19:29:20,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:29:20,713 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2021-12-06 19:29:20,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:29:20,714 INFO L225 Difference]: With dead ends: 58 [2021-12-06 19:29:20,714 INFO L226 Difference]: Without dead ends: 56 [2021-12-06 19:29:20,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:29:20,715 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 12 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:29:20,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 134 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:29:20,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-06 19:29:20,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-12-06 19:29:20,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-06 19:29:20,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-12-06 19:29:20,723 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 56 [2021-12-06 19:29:20,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:29:20,723 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-12-06 19:29:20,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 19:29:20,723 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-12-06 19:29:20,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 19:29:20,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:29:20,724 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:29:20,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 19:29:20,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:29:20,926 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:29:20,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:29:20,927 INFO L85 PathProgramCache]: Analyzing trace with hash -759965185, now seen corresponding path program 1 times [2021-12-06 19:29:20,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:29:20,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827800133] [2021-12-06 19:29:20,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:20,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:29:20,968 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:29:20,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897373091] [2021-12-06 19:29:20,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:20,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:29:20,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:29:20,970 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:29:20,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 19:29:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:29:21,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 19:29:21,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:29:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-06 19:29:21,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:29:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-06 19:29:21,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:29:21,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827800133] [2021-12-06 19:29:21,179 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:29:21,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897373091] [2021-12-06 19:29:21,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897373091] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:29:21,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:29:21,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-06 19:29:21,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348881229] [2021-12-06 19:29:21,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:29:21,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 19:29:21,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:29:21,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 19:29:21,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:29:21,181 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 19:29:21,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:29:21,290 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2021-12-06 19:29:21,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:29:21,290 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 65 [2021-12-06 19:29:21,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:29:21,292 INFO L225 Difference]: With dead ends: 102 [2021-12-06 19:29:21,292 INFO L226 Difference]: Without dead ends: 94 [2021-12-06 19:29:21,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-06 19:29:21,294 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 32 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:29:21,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 257 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:29:21,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-06 19:29:21,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2021-12-06 19:29:21,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-06 19:29:21,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2021-12-06 19:29:21,312 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 65 [2021-12-06 19:29:21,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:29:21,312 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2021-12-06 19:29:21,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 19:29:21,313 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2021-12-06 19:29:21,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 19:29:21,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:29:21,314 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:29:21,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 19:29:21,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:29:21,516 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:29:21,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:29:21,517 INFO L85 PathProgramCache]: Analyzing trace with hash -696294669, now seen corresponding path program 1 times [2021-12-06 19:29:21,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:29:21,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330487527] [2021-12-06 19:29:21,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:21,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:29:21,541 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:29:21,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [703791388] [2021-12-06 19:29:21,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:21,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:29:21,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:29:21,545 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:29:21,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 19:29:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:29:21,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 19:29:21,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:29:21,833 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-06 19:29:21,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:29:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-06 19:29:21,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:29:21,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330487527] [2021-12-06 19:29:21,959 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:29:21,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703791388] [2021-12-06 19:29:21,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703791388] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:29:21,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:29:21,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-12-06 19:29:21,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664783222] [2021-12-06 19:29:21,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:29:21,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 19:29:21,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:29:21,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 19:29:21,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:29:21,960 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-12-06 19:29:22,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:29:22,226 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2021-12-06 19:29:22,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 19:29:22,227 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 71 [2021-12-06 19:29:22,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:29:22,229 INFO L225 Difference]: With dead ends: 128 [2021-12-06 19:29:22,229 INFO L226 Difference]: Without dead ends: 124 [2021-12-06 19:29:22,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:29:22,230 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 36 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:29:22,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 312 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:29:22,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-06 19:29:22,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2021-12-06 19:29:22,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 50 states have (on average 1.18) internal successors, (59), 52 states have internal predecessors, (59), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-06 19:29:22,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2021-12-06 19:29:22,252 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 71 [2021-12-06 19:29:22,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:29:22,252 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2021-12-06 19:29:22,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-12-06 19:29:22,252 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2021-12-06 19:29:22,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 19:29:22,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:29:22,254 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:29:22,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 19:29:22,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:29:22,456 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:29:22,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:29:22,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1352497678, now seen corresponding path program 2 times [2021-12-06 19:29:22,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:29:22,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807613430] [2021-12-06 19:29:22,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:22,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:29:22,489 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:29:22,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1590746786] [2021-12-06 19:29:22,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:29:22,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:29:22,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:29:22,492 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:29:22,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 19:29:22,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:29:22,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:29:22,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 19:29:22,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:29:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 19:29:22,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:29:22,825 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 19:29:22,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:29:22,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807613430] [2021-12-06 19:29:22,825 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:29:22,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590746786] [2021-12-06 19:29:22,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590746786] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:29:22,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:29:22,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-12-06 19:29:22,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65065782] [2021-12-06 19:29:22,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:29:22,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 19:29:22,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:29:22,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 19:29:22,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:29:22,827 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-06 19:29:23,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:29:23,695 INFO L93 Difference]: Finished difference Result 116 states and 159 transitions. [2021-12-06 19:29:23,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 19:29:23,696 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 76 [2021-12-06 19:29:23,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:29:23,697 INFO L225 Difference]: With dead ends: 116 [2021-12-06 19:29:23,697 INFO L226 Difference]: Without dead ends: 114 [2021-12-06 19:29:23,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-12-06 19:29:23,698 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:29:23,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 221 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 19:29:23,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-06 19:29:23,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 96. [2021-12-06 19:29:23,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 53 states have (on average 1.169811320754717) internal successors, (62), 55 states have internal predecessors, (62), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-06 19:29:23,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 129 transitions. [2021-12-06 19:29:23,715 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 129 transitions. Word has length 76 [2021-12-06 19:29:23,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:29:23,716 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 129 transitions. [2021-12-06 19:29:23,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-06 19:29:23,716 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 129 transitions. [2021-12-06 19:29:23,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 19:29:23,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:29:23,717 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:29:23,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-06 19:29:23,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:29:23,918 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:29:23,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:29:23,918 INFO L85 PathProgramCache]: Analyzing trace with hash -421153901, now seen corresponding path program 3 times [2021-12-06 19:29:23,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:29:23,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344787240] [2021-12-06 19:29:23,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:23,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:29:23,926 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:29:23,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776846713] [2021-12-06 19:29:23,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:29:23,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:29:23,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:29:23,927 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:29:23,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 19:29:23,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 19:29:23,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:29:23,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 19:29:23,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:29:24,253 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-06 19:29:24,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:29:24,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:29:24,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344787240] [2021-12-06 19:29:24,331 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:29:24,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776846713] [2021-12-06 19:29:24,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776846713] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:29:24,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:29:24,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-06 19:29:24,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393151926] [2021-12-06 19:29:24,331 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:29:24,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 19:29:24,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:29:24,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 19:29:24,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:29:24,332 INFO L87 Difference]: Start difference. First operand 96 states and 129 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-06 19:29:24,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:29:24,508 INFO L93 Difference]: Finished difference Result 128 states and 168 transitions. [2021-12-06 19:29:24,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:29:24,509 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 81 [2021-12-06 19:29:24,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:29:24,510 INFO L225 Difference]: With dead ends: 128 [2021-12-06 19:29:24,510 INFO L226 Difference]: Without dead ends: 126 [2021-12-06 19:29:24,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-12-06 19:29:24,511 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:29:24,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 226 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:29:24,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-06 19:29:24,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2021-12-06 19:29:24,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 71 states have internal predecessors, (80), 42 states have call successors, (42), 11 states have call predecessors, (42), 11 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2021-12-06 19:29:24,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 163 transitions. [2021-12-06 19:29:24,526 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 163 transitions. Word has length 81 [2021-12-06 19:29:24,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:29:24,526 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 163 transitions. [2021-12-06 19:29:24,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-06 19:29:24,526 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 163 transitions. [2021-12-06 19:29:24,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 19:29:24,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:29:24,527 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:29:24,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 19:29:24,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 19:29:24,729 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:29:24,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:29:24,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1712962370, now seen corresponding path program 1 times [2021-12-06 19:29:24,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:29:24,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072008423] [2021-12-06 19:29:24,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:24,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:29:24,759 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:29:24,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942691549] [2021-12-06 19:29:24,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:24,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:29:24,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:29:24,762 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:29:24,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 19:29:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:29:24,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 19:29:24,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:29:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-06 19:29:25,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:29:25,528 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-06 19:29:25,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:29:25,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072008423] [2021-12-06 19:29:25,528 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:29:25,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942691549] [2021-12-06 19:29:25,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942691549] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:29:25,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:29:25,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-12-06 19:29:25,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947999315] [2021-12-06 19:29:25,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:29:25,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 19:29:25,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:29:25,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 19:29:25,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:29:25,530 INFO L87 Difference]: Start difference. First operand 123 states and 163 transitions. Second operand has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-06 19:29:28,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:29:28,402 INFO L93 Difference]: Finished difference Result 205 states and 282 transitions. [2021-12-06 19:29:28,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 19:29:28,403 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 87 [2021-12-06 19:29:28,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:29:28,404 INFO L225 Difference]: With dead ends: 205 [2021-12-06 19:29:28,404 INFO L226 Difference]: Without dead ends: 196 [2021-12-06 19:29:28,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 19:29:28,405 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 61 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:29:28,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 444 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 19:29:28,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-06 19:29:28,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2021-12-06 19:29:28,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 109 states have internal predecessors, (126), 70 states have call successors, (70), 14 states have call predecessors, (70), 14 states have return successors, (69), 68 states have call predecessors, (69), 69 states have call successors, (69) [2021-12-06 19:29:28,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 265 transitions. [2021-12-06 19:29:28,431 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 265 transitions. Word has length 87 [2021-12-06 19:29:28,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:29:28,432 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 265 transitions. [2021-12-06 19:29:28,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-06 19:29:28,432 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 265 transitions. [2021-12-06 19:29:28,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 19:29:28,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:29:28,433 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:29:28,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 19:29:28,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 19:29:28,635 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:29:28,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:29:28,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1899970478, now seen corresponding path program 1 times [2021-12-06 19:29:28,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:29:28,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878544963] [2021-12-06 19:29:28,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:28,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:29:28,666 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:29:28,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746191468] [2021-12-06 19:29:28,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:28,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:29:28,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:29:28,668 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:29:28,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 19:29:28,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:29:28,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 19:29:28,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:29:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 59 proven. 35 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-12-06 19:29:29,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:29:40,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:29:40,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878544963] [2021-12-06 19:29:40,043 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:29:40,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746191468] [2021-12-06 19:29:40,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746191468] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:29:40,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:29:40,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-06 19:29:40,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125799778] [2021-12-06 19:29:40,044 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:29:40,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 19:29:40,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:29:40,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 19:29:40,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=181, Unknown=5, NotChecked=0, Total=240 [2021-12-06 19:29:40,045 INFO L87 Difference]: Start difference. First operand 192 states and 265 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-12-06 19:29:40,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:29:40,447 INFO L93 Difference]: Finished difference Result 199 states and 271 transitions. [2021-12-06 19:29:40,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 19:29:40,448 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 103 [2021-12-06 19:29:40,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:29:40,449 INFO L225 Difference]: With dead ends: 199 [2021-12-06 19:29:40,449 INFO L226 Difference]: Without dead ends: 197 [2021-12-06 19:29:40,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=76, Invalid=261, Unknown=5, NotChecked=0, Total=342 [2021-12-06 19:29:40,450 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 20 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:29:40,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 302 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:29:40,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-06 19:29:40,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2021-12-06 19:29:40,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 110 states have (on average 1.1727272727272726) internal successors, (129), 112 states have internal predecessors, (129), 70 states have call successors, (70), 15 states have call predecessors, (70), 15 states have return successors, (69), 68 states have call predecessors, (69), 69 states have call successors, (69) [2021-12-06 19:29:40,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 268 transitions. [2021-12-06 19:29:40,495 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 268 transitions. Word has length 103 [2021-12-06 19:29:40,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:29:40,495 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 268 transitions. [2021-12-06 19:29:40,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-12-06 19:29:40,496 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 268 transitions. [2021-12-06 19:29:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 19:29:40,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:29:40,497 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:29:40,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 19:29:40,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 19:29:40,699 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:29:40,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:29:40,700 INFO L85 PathProgramCache]: Analyzing trace with hash -992204181, now seen corresponding path program 4 times [2021-12-06 19:29:40,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:29:40,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060765596] [2021-12-06 19:29:40,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:40,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:29:40,727 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:29:40,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670636283] [2021-12-06 19:29:40,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:29:40,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:29:40,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:29:40,731 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:29:40,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 19:29:40,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:29:40,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:29:40,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 19:29:40,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:29:40,914 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-06 19:29:40,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:29:40,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:29:40,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060765596] [2021-12-06 19:29:40,915 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:29:40,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670636283] [2021-12-06 19:29:40,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670636283] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:29:40,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:29:40,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:29:40,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630404884] [2021-12-06 19:29:40,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:29:40,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:29:40,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:29:40,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:29:40,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:29:40,916 INFO L87 Difference]: Start difference. First operand 196 states and 268 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-06 19:29:40,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:29:40,971 INFO L93 Difference]: Finished difference Result 258 states and 354 transitions. [2021-12-06 19:29:40,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:29:40,971 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 106 [2021-12-06 19:29:40,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:29:40,973 INFO L225 Difference]: With dead ends: 258 [2021-12-06 19:29:40,973 INFO L226 Difference]: Without dead ends: 184 [2021-12-06 19:29:40,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:29:40,974 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:29:40,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 167 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:29:40,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-06 19:29:40,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 171. [2021-12-06 19:29:40,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 96 states have (on average 1.125) internal successors, (108), 97 states have internal predecessors, (108), 59 states have call successors, (59), 15 states have call predecessors, (59), 15 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2021-12-06 19:29:40,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 225 transitions. [2021-12-06 19:29:40,997 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 225 transitions. Word has length 106 [2021-12-06 19:29:40,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:29:40,998 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 225 transitions. [2021-12-06 19:29:40,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-06 19:29:40,998 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 225 transitions. [2021-12-06 19:29:41,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 19:29:41,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:29:41,001 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:29:41,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 19:29:41,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 19:29:41,203 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:29:41,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:29:41,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1098112047, now seen corresponding path program 2 times [2021-12-06 19:29:41,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:29:41,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238387026] [2021-12-06 19:29:41,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:41,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:29:41,232 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:29:41,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1337210317] [2021-12-06 19:29:41,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:29:41,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:29:41,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:29:41,236 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:29:41,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 19:29:41,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:29:41,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:29:41,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 19:29:41,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:29:41,862 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 71 proven. 36 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2021-12-06 19:29:41,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:29:45,115 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 71 proven. 36 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2021-12-06 19:29:45,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:29:45,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238387026] [2021-12-06 19:29:45,116 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:29:45,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337210317] [2021-12-06 19:29:45,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337210317] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:29:45,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:29:45,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-12-06 19:29:45,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545413787] [2021-12-06 19:29:45,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:29:45,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 19:29:45,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:29:45,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 19:29:45,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-12-06 19:29:45,117 INFO L87 Difference]: Start difference. First operand 171 states and 225 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 12 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (38), 12 states have call predecessors, (38), 11 states have call successors, (38) [2021-12-06 19:29:49,730 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 19:29:52,306 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 19:29:53,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:29:53,859 INFO L93 Difference]: Finished difference Result 262 states and 355 transitions. [2021-12-06 19:29:53,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 19:29:53,860 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 12 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (38), 12 states have call predecessors, (38), 11 states have call successors, (38) Word has length 125 [2021-12-06 19:29:53,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:29:53,862 INFO L225 Difference]: With dead ends: 262 [2021-12-06 19:29:53,862 INFO L226 Difference]: Without dead ends: 260 [2021-12-06 19:29:53,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2021-12-06 19:29:53,863 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 59 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 136 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:29:53,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 419 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 596 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2021-12-06 19:29:53,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-06 19:29:53,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 258. [2021-12-06 19:29:53,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 143 states have (on average 1.132867132867133) internal successors, (162), 145 states have internal predecessors, (162), 95 states have call successors, (95), 19 states have call predecessors, (95), 19 states have return successors, (94), 93 states have call predecessors, (94), 94 states have call successors, (94) [2021-12-06 19:29:53,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 351 transitions. [2021-12-06 19:29:53,924 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 351 transitions. Word has length 125 [2021-12-06 19:29:53,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:29:53,925 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 351 transitions. [2021-12-06 19:29:53,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 12 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (38), 12 states have call predecessors, (38), 11 states have call successors, (38) [2021-12-06 19:29:53,925 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 351 transitions. [2021-12-06 19:29:53,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 19:29:53,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:29:53,926 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:29:53,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-06 19:29:54,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:29:54,128 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:29:54,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:29:54,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1816082155, now seen corresponding path program 2 times [2021-12-06 19:29:54,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:29:54,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699097758] [2021-12-06 19:29:54,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:54,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:29:54,158 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:29:54,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436553296] [2021-12-06 19:29:54,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:29:54,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:29:54,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:29:54,162 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:29:54,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 19:29:54,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:29:54,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:29:54,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-06 19:29:54,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:29:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 143 proven. 64 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2021-12-06 19:29:56,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:29:59,691 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 154 proven. 12 refuted. 0 times theorem prover too weak. 449 trivial. 0 not checked. [2021-12-06 19:29:59,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:29:59,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699097758] [2021-12-06 19:29:59,692 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:29:59,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436553296] [2021-12-06 19:29:59,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436553296] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:29:59,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:29:59,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12] total 29 [2021-12-06 19:29:59,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734301193] [2021-12-06 19:29:59,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:29:59,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 19:29:59,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:29:59,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 19:29:59,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-12-06 19:29:59,693 INFO L87 Difference]: Start difference. First operand 258 states and 351 transitions. Second operand has 29 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 21 states have internal predecessors, (48), 15 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) [2021-12-06 19:30:16,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:30:16,193 INFO L93 Difference]: Finished difference Result 307 states and 414 transitions. [2021-12-06 19:30:16,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 19:30:16,194 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 21 states have internal predecessors, (48), 15 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) Word has length 134 [2021-12-06 19:30:16,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:30:16,196 INFO L225 Difference]: With dead ends: 307 [2021-12-06 19:30:16,196 INFO L226 Difference]: Without dead ends: 299 [2021-12-06 19:30:16,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=440, Invalid=2110, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 19:30:16,197 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 79 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:30:16,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 440 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2021-12-06 19:30:16,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-12-06 19:30:16,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 236. [2021-12-06 19:30:16,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 131 states have (on average 1.099236641221374) internal successors, (144), 132 states have internal predecessors, (144), 82 states have call successors, (82), 22 states have call predecessors, (82), 22 states have return successors, (82), 81 states have call predecessors, (82), 82 states have call successors, (82) [2021-12-06 19:30:16,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 308 transitions. [2021-12-06 19:30:16,252 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 308 transitions. Word has length 134 [2021-12-06 19:30:16,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:30:16,252 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 308 transitions. [2021-12-06 19:30:16,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 21 states have internal predecessors, (48), 15 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) [2021-12-06 19:30:16,253 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 308 transitions. [2021-12-06 19:30:16,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-06 19:30:16,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:30:16,254 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:30:16,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 19:30:16,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 19:30:16,455 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:30:16,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:30:16,455 INFO L85 PathProgramCache]: Analyzing trace with hash 2095255219, now seen corresponding path program 3 times [2021-12-06 19:30:16,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:30:16,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457632991] [2021-12-06 19:30:16,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:30:16,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:30:16,463 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:30:16,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061177714] [2021-12-06 19:30:16,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:30:16,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:30:16,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:30:16,464 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:30:16,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 19:30:39,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 19:30:39,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:30:39,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 19:30:39,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:30:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 180 proven. 38 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2021-12-06 19:30:41,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:30:41,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:30:41,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457632991] [2021-12-06 19:30:41,847 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:30:41,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061177714] [2021-12-06 19:30:41,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061177714] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:30:41,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:30:41,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-12-06 19:30:41,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630521516] [2021-12-06 19:30:41,847 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:30:41,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 19:30:41,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:30:41,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 19:30:41,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-12-06 19:30:41,848 INFO L87 Difference]: Start difference. First operand 236 states and 308 transitions. Second operand has 18 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2021-12-06 19:30:49,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:30:49,507 INFO L93 Difference]: Finished difference Result 335 states and 461 transitions. [2021-12-06 19:30:49,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 19:30:49,508 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 175 [2021-12-06 19:30:49,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:30:49,510 INFO L225 Difference]: With dead ends: 335 [2021-12-06 19:30:49,510 INFO L226 Difference]: Without dead ends: 333 [2021-12-06 19:30:49,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 19:30:49,511 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 44 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:30:49,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 361 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 19:30:49,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-12-06 19:30:49,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 328. [2021-12-06 19:30:49,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 172 states have (on average 1.127906976744186) internal successors, (194), 174 states have internal predecessors, (194), 130 states have call successors, (130), 25 states have call predecessors, (130), 25 states have return successors, (130), 128 states have call predecessors, (130), 130 states have call successors, (130) [2021-12-06 19:30:49,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 454 transitions. [2021-12-06 19:30:49,601 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 454 transitions. Word has length 175 [2021-12-06 19:30:49,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:30:49,602 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 454 transitions. [2021-12-06 19:30:49,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2021-12-06 19:30:49,602 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 454 transitions. [2021-12-06 19:30:49,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-06 19:30:49,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:30:49,604 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:30:49,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-06 19:30:49,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 19:30:49,805 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:30:49,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:30:49,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1062534286, now seen corresponding path program 4 times [2021-12-06 19:30:49,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:30:49,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901970874] [2021-12-06 19:30:49,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:30:49,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:30:49,837 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:30:49,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1387644564] [2021-12-06 19:30:49,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:30:49,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:30:49,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:30:49,839 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:30:49,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 19:30:50,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:30:50,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:30:50,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-06 19:30:50,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:30:52,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 258 proven. 162 refuted. 0 times theorem prover too weak. 1233 trivial. 0 not checked. [2021-12-06 19:30:52,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:30:58,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:30:58,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901970874] [2021-12-06 19:30:58,720 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:30:58,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387644564] [2021-12-06 19:30:58,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387644564] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:30:58,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:30:58,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-12-06 19:30:58,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752596097] [2021-12-06 19:30:58,720 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:30:58,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 19:30:58,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:30:58,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 19:30:58,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-12-06 19:30:58,722 INFO L87 Difference]: Start difference. First operand 328 states and 454 transitions. Second operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 11 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2021-12-06 19:31:00,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:00,858 INFO L93 Difference]: Finished difference Result 418 states and 569 transitions. [2021-12-06 19:31:00,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 19:31:00,859 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 11 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) Word has length 197 [2021-12-06 19:31:00,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:00,861 INFO L225 Difference]: With dead ends: 418 [2021-12-06 19:31:00,861 INFO L226 Difference]: Without dead ends: 416 [2021-12-06 19:31:00,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=298, Invalid=1508, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 19:31:00,862 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 64 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 1622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:00,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 914 Invalid, 1622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1535 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 19:31:00,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-12-06 19:31:00,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 408. [2021-12-06 19:31:00,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 216 states have (on average 1.125) internal successors, (243), 218 states have internal predecessors, (243), 158 states have call successors, (158), 33 states have call predecessors, (158), 33 states have return successors, (158), 156 states have call predecessors, (158), 158 states have call successors, (158) [2021-12-06 19:31:00,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 559 transitions. [2021-12-06 19:31:00,973 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 559 transitions. Word has length 197 [2021-12-06 19:31:00,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:00,973 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 559 transitions. [2021-12-06 19:31:00,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 11 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2021-12-06 19:31:00,974 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 559 transitions. [2021-12-06 19:31:00,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-06 19:31:00,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:00,978 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:00,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 19:31:01,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 19:31:01,180 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:31:01,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:01,181 INFO L85 PathProgramCache]: Analyzing trace with hash -2042278159, now seen corresponding path program 5 times [2021-12-06 19:31:01,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:31:01,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655872417] [2021-12-06 19:31:01,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:01,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:31:01,213 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:31:01,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738692354] [2021-12-06 19:31:01,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:31:01,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:31:01,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:31:01,215 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:31:01,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 19:31:01,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-06 19:31:01,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:31:01,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 108 conjunts are in the unsatisfiable core [2021-12-06 19:31:01,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:06,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2158 backedges. 200 proven. 305 refuted. 0 times theorem prover too weak. 1653 trivial. 0 not checked. [2021-12-06 19:31:06,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:17,313 WARN L227 SmtUtils]: Spent 5.43s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:31:43,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:31:43,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655872417] [2021-12-06 19:31:43,937 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:31:43,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738692354] [2021-12-06 19:31:43,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738692354] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:43,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:31:43,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-12-06 19:31:43,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303940142] [2021-12-06 19:31:43,937 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:43,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 19:31:43,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:31:43,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 19:31:43,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1116, Unknown=1, NotChecked=0, Total=1406 [2021-12-06 19:31:43,938 INFO L87 Difference]: Start difference. First operand 408 states and 559 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 22 states have internal predecessors, (45), 13 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (37), 13 states have call predecessors, (37), 13 states have call successors, (37) [2021-12-06 19:31:48,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:48,948 INFO L93 Difference]: Finished difference Result 477 states and 639 transitions. [2021-12-06 19:31:48,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 19:31:48,949 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 22 states have internal predecessors, (45), 13 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (37), 13 states have call predecessors, (37), 13 states have call successors, (37) Word has length 219 [2021-12-06 19:31:48,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:48,951 INFO L225 Difference]: With dead ends: 477 [2021-12-06 19:31:48,952 INFO L226 Difference]: Without dead ends: 475 [2021-12-06 19:31:48,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 295 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=473, Invalid=2076, Unknown=1, NotChecked=0, Total=2550 [2021-12-06 19:31:48,953 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 60 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 1751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:48,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 898 Invalid, 1751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1664 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 19:31:48,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-12-06 19:31:49,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 467. [2021-12-06 19:31:49,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 251 states have (on average 1.1195219123505975) internal successors, (281), 253 states have internal predecessors, (281), 174 states have call successors, (174), 41 states have call predecessors, (174), 41 states have return successors, (174), 172 states have call predecessors, (174), 174 states have call successors, (174) [2021-12-06 19:31:49,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 629 transitions. [2021-12-06 19:31:49,076 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 629 transitions. Word has length 219 [2021-12-06 19:31:49,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:49,076 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 629 transitions. [2021-12-06 19:31:49,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 22 states have internal predecessors, (45), 13 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (37), 13 states have call predecessors, (37), 13 states have call successors, (37) [2021-12-06 19:31:49,077 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 629 transitions. [2021-12-06 19:31:49,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-06 19:31:49,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:49,079 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:49,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 19:31:49,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 19:31:49,280 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:31:49,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:49,280 INFO L85 PathProgramCache]: Analyzing trace with hash 474997075, now seen corresponding path program 6 times [2021-12-06 19:31:49,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:31:49,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629903872] [2021-12-06 19:31:49,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:49,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:31:49,289 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:31:49,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699261476] [2021-12-06 19:31:49,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 19:31:49,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:31:49,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:31:49,290 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:31:49,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 19:31:50,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-06 19:31:50,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:31:50,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 19:31:50,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2158 backedges. 312 proven. 31 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2021-12-06 19:31:59,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:32:01,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:32:01,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629903872] [2021-12-06 19:32:01,497 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:32:01,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699261476] [2021-12-06 19:32:01,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699261476] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:32:01,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:32:01,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-12-06 19:32:01,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156106252] [2021-12-06 19:32:01,497 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:32:01,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 19:32:01,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:32:01,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 19:32:01,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=278, Unknown=1, NotChecked=0, Total=342 [2021-12-06 19:32:01,498 INFO L87 Difference]: Start difference. First operand 467 states and 629 transitions. Second operand has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) [2021-12-06 19:32:12,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:32:12,614 INFO L93 Difference]: Finished difference Result 476 states and 636 transitions. [2021-12-06 19:32:12,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 19:32:12,615 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) Word has length 219 [2021-12-06 19:32:12,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:32:12,615 INFO L225 Difference]: With dead ends: 476 [2021-12-06 19:32:12,615 INFO L226 Difference]: Without dead ends: 0 [2021-12-06 19:32:12,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 206 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=116, Invalid=531, Unknown=3, NotChecked=0, Total=650 [2021-12-06 19:32:12,617 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 35 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:32:12,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 285 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 419 Invalid, 0 Unknown, 31 Unchecked, 2.7s Time] [2021-12-06 19:32:12,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-06 19:32:12,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-06 19:32:12,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:32:12,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-06 19:32:12,618 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 219 [2021-12-06 19:32:12,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:32:12,619 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-06 19:32:12,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) [2021-12-06 19:32:12,619 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-06 19:32:12,619 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-06 19:32:12,620 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 19:32:12,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 19:32:12,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:32:12,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-06 19:32:55,726 WARN L227 SmtUtils]: Spent 38.05s on a formula simplification. DAG size of input: 308 DAG size of output: 52 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-12-06 19:33:18,740 WARN L227 SmtUtils]: Spent 23.01s on a formula simplification. DAG size of input: 232 DAG size of output: 51 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-12-06 19:33:50,091 WARN L227 SmtUtils]: Spent 31.34s on a formula simplification. DAG size of input: 315 DAG size of output: 48 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-12-06 19:34:36,893 WARN L227 SmtUtils]: Spent 46.80s on a formula simplification. DAG size of input: 314 DAG size of output: 48 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-12-06 19:35:20,463 WARN L227 SmtUtils]: Spent 43.57s on a formula simplification. DAG size of input: 322 DAG size of output: 49 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-12-06 19:36:09,350 WARN L227 SmtUtils]: Spent 48.82s on a formula simplification. DAG size of input: 322 DAG size of output: 49 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-12-06 19:36:10,034 INFO L854 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (<= |ULTIMATE.start_main_~y~0#1| 10)) (.cse3 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse4 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)))) (.cse5 (<= 0 |ULTIMATE.start_main_~c~0#1|)) (.cse6 (<= |ULTIMATE.start_main_~x~0#1| 10)) (.cse7 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse8 (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~a~0#1|)) (.cse9 (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))))) (or (and (<= 0 |ULTIMATE.start_main_~b~0#1|) (not (= |ULTIMATE.start_main_~b~0#1| 0)) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) .cse8 .cse9) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse7 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse8 .cse9 (= |ULTIMATE.start_main_~s~0#1| 1)))) [2021-12-06 19:36:10,034 INFO L854 garLoopResultBuilder]: At program point L48-1(line 48) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (<= |ULTIMATE.start_main_~y~0#1| 10)) (.cse3 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse4 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)))) (.cse5 (<= 0 |ULTIMATE.start_main_~c~0#1|)) (.cse6 (<= |ULTIMATE.start_main_~x~0#1| 10)) (.cse7 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse8 (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~a~0#1|)) (.cse9 (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))))) (or (and (<= 0 |ULTIMATE.start_main_~b~0#1|) (not (= |ULTIMATE.start_main_~b~0#1| 0)) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) .cse8 .cse9) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse7 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse8 .cse9 (= |ULTIMATE.start_main_~s~0#1| 1)))) [2021-12-06 19:36:10,034 INFO L861 garLoopResultBuilder]: At program point L73(lines 18 74) the Hoare annotation is: true [2021-12-06 19:36:10,034 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-06 19:36:10,034 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-06 19:36:10,034 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-06 19:36:10,034 INFO L854 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 10)) [2021-12-06 19:36:10,034 INFO L854 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 10) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 10)) [2021-12-06 19:36:10,034 INFO L854 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (<= |ULTIMATE.start_main_~y~0#1| 10)) (.cse3 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse4 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)))) (.cse5 (<= 0 |ULTIMATE.start_main_~c~0#1|)) (.cse6 (<= |ULTIMATE.start_main_~x~0#1| 10)) (.cse7 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse8 (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~a~0#1|)) (.cse9 (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))))) (or (and (<= 0 |ULTIMATE.start_main_~b~0#1|) (not (= |ULTIMATE.start_main_~b~0#1| 0)) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) .cse8 .cse9) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse7 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse8 .cse9 (= |ULTIMATE.start_main_~s~0#1| 1)))) [2021-12-06 19:36:10,035 INFO L854 garLoopResultBuilder]: At program point L41-1(lines 39 68) the Hoare annotation is: (let ((.cse7 (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (let ((.cse0 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse1 (<= |ULTIMATE.start_main_~y~0#1| 10)) (.cse2 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse3 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)))) (.cse4 (<= |ULTIMATE.start_main_~x~0#1| 10)) (.cse5 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse6 (= |ULTIMATE.start_main_~a~0#1| .cse7))) (or (and .cse0 .cse1 .cse2 .cse3 (<= 1 |ULTIMATE.start_main_~b~0#1|) .cse4 (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse5 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse6 (= |ULTIMATE.start_main_~s~0#1| 1)) (and (or (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|) (not (= |ULTIMATE.start_main_~c~0#1| 0)) (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~s~0#1|)) .cse7)) (<= 0 |ULTIMATE.start_main_~b~0#1|) .cse0 (<= 1 |ULTIMATE.start_main_~y~0#1|) .cse1 .cse2 .cse3 .cse4 .cse5 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) .cse6)))) [2021-12-06 19:36:10,035 INFO L854 garLoopResultBuilder]: At program point L41-2(lines 41 68) the Hoare annotation is: (let ((.cse0 (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)))) (and (<= 1 |ULTIMATE.start_main_~y~0#1|) (= 0 .cse0) (= |ULTIMATE.start_main_~b~0#1| .cse0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))))) [2021-12-06 19:36:10,035 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-06 19:36:10,035 INFO L854 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~y~0#1| 10) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 10) (<= 1 |ULTIMATE.start_main_~x~0#1|)) [2021-12-06 19:36:10,035 INFO L854 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse9 (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (let ((.cse0 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (<= |ULTIMATE.start_main_~y~0#1| 10)) (.cse3 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse4 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)))) (.cse5 (<= 0 |ULTIMATE.start_main_~c~0#1|)) (.cse6 (<= |ULTIMATE.start_main_~x~0#1| 10)) (.cse7 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse8 (= |ULTIMATE.start_main_~a~0#1| .cse9))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse7 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~a~0#1|) .cse8 (= |ULTIMATE.start_main_~s~0#1| 1)) (and (<= 0 |ULTIMATE.start_main_~b~0#1|) (not (= |ULTIMATE.start_main_~b~0#1| 0)) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (= .cse9 (+ |ULTIMATE.start_main_~c~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~q~0#1|))) .cse7 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) .cse8)))) [2021-12-06 19:36:10,035 INFO L858 garLoopResultBuilder]: For program point L42(lines 42 43) no Hoare annotation was computed. [2021-12-06 19:36:10,035 INFO L854 garLoopResultBuilder]: At program point L71(line 71) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) [2021-12-06 19:36:10,035 INFO L854 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: (and (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (<= |ULTIMATE.start_main_~y~0#1| 10) (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|) (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|))) (<= 1 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 10) (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (= |ULTIMATE.start_main_~s~0#1| 1)) [2021-12-06 19:36:10,035 INFO L854 garLoopResultBuilder]: At program point L38-1(line 38) the Hoare annotation is: (and (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (<= |ULTIMATE.start_main_~y~0#1| 10) (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|) (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|))) (<= 1 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 10) (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (= |ULTIMATE.start_main_~s~0#1| 1)) [2021-12-06 19:36:10,036 INFO L858 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2021-12-06 19:36:10,036 INFO L861 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2021-12-06 19:36:10,036 INFO L858 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-12-06 19:36:10,036 INFO L858 garLoopResultBuilder]: For program point L51(lines 47 56) no Hoare annotation was computed. [2021-12-06 19:36:10,036 INFO L854 garLoopResultBuilder]: At program point L47-2(lines 47 56) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (<= |ULTIMATE.start_main_~y~0#1| 10)) (.cse3 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse4 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)))) (.cse5 (<= 0 |ULTIMATE.start_main_~c~0#1|)) (.cse6 (<= |ULTIMATE.start_main_~x~0#1| 10)) (.cse7 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse8 (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~a~0#1|)) (.cse9 (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))))) (or (and (<= 0 |ULTIMATE.start_main_~b~0#1|) (not (= |ULTIMATE.start_main_~b~0#1| 0)) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) .cse8 .cse9) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse7 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse8 .cse9 (= |ULTIMATE.start_main_~s~0#1| 1)))) [2021-12-06 19:36:10,036 INFO L858 garLoopResultBuilder]: For program point L47-3(lines 47 56) no Hoare annotation was computed. [2021-12-06 19:36:10,036 INFO L858 garLoopResultBuilder]: For program point L72(line 72) no Hoare annotation was computed. [2021-12-06 19:36:10,036 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-12-06 19:36:10,036 INFO L858 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-12-06 19:36:10,036 INFO L858 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-12-06 19:36:10,036 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-12-06 19:36:10,037 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-12-06 19:36:10,037 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-12-06 19:36:10,037 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-12-06 19:36:10,037 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-12-06 19:36:10,037 INFO L858 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-12-06 19:36:10,037 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-12-06 19:36:10,039 INFO L732 BasicCegarLoop]: Path program histogram: [6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:36:10,040 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 19:36:10,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 07:36:10 BoogieIcfgContainer [2021-12-06 19:36:10,053 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 19:36:10,053 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 19:36:10,053 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 19:36:10,053 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 19:36:10,054 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:29:17" (3/4) ... [2021-12-06 19:36:10,055 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-06 19:36:10,060 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-12-06 19:36:10,060 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-12-06 19:36:10,063 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-12-06 19:36:10,063 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-06 19:36:10,064 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-06 19:36:10,064 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-06 19:36:10,089 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 19:36:10,089 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 19:36:10,089 INFO L158 Benchmark]: Toolchain (without parser) took 412970.82ms. Allocated memory was 107.0MB in the beginning and 226.5MB in the end (delta: 119.5MB). Free memory was 72.8MB in the beginning and 191.4MB in the end (delta: -118.7MB). Peak memory consumption was 771.9kB. Max. memory is 16.1GB. [2021-12-06 19:36:10,089 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 107.0MB. Free memory is still 89.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:36:10,089 INFO L158 Benchmark]: CACSL2BoogieTranslator took 191.63ms. Allocated memory is still 107.0MB. Free memory was 72.6MB in the beginning and 83.7MB in the end (delta: -11.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 19:36:10,090 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.52ms. Allocated memory is still 107.0MB. Free memory was 83.7MB in the beginning and 82.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 19:36:10,090 INFO L158 Benchmark]: Boogie Preprocessor took 19.57ms. Allocated memory is still 107.0MB. Free memory was 82.1MB in the beginning and 81.1MB in the end (delta: 992.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:36:10,090 INFO L158 Benchmark]: RCFGBuilder took 210.92ms. Allocated memory is still 107.0MB. Free memory was 81.1MB in the beginning and 70.7MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 19:36:10,090 INFO L158 Benchmark]: TraceAbstraction took 412481.41ms. Allocated memory was 107.0MB in the beginning and 226.5MB in the end (delta: 119.5MB). Free memory was 70.2MB in the beginning and 194.6MB in the end (delta: -124.3MB). Peak memory consumption was 127.1MB. Max. memory is 16.1GB. [2021-12-06 19:36:10,091 INFO L158 Benchmark]: Witness Printer took 35.65ms. Allocated memory is still 226.5MB. Free memory was 194.6MB in the beginning and 191.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 19:36:10,092 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 107.0MB. Free memory is still 89.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 191.63ms. Allocated memory is still 107.0MB. Free memory was 72.6MB in the beginning and 83.7MB in the end (delta: -11.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.52ms. Allocated memory is still 107.0MB. Free memory was 83.7MB in the beginning and 82.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.57ms. Allocated memory is still 107.0MB. Free memory was 82.1MB in the beginning and 81.1MB in the end (delta: 992.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 210.92ms. Allocated memory is still 107.0MB. Free memory was 81.1MB in the beginning and 70.7MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 412481.41ms. Allocated memory was 107.0MB in the beginning and 226.5MB in the end (delta: 119.5MB). Free memory was 70.2MB in the beginning and 194.6MB in the end (delta: -124.3MB). Peak memory consumption was 127.1MB. Max. memory is 16.1GB. * Witness Printer took 35.65ms. Allocated memory is still 226.5MB. Free memory was 194.6MB in the beginning and 191.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 412.4s, OverallIterations: 19, TraceHistogramMax: 32, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 56.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 237.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 709 SdHoareTripleChecker+Valid, 26.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 600 mSDsluCounter, 5994 SdHoareTripleChecker+Invalid, 25.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 31 IncrementalHoareTripleChecker+Unchecked, 5164 mSDsCounter, 1026 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7855 IncrementalHoareTripleChecker+Invalid, 8913 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1026 mSolverCounterUnsat, 830 mSDtfsCounter, 7855 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2914 GetRequests, 2515 SyntacticMatches, 22 SemanticMatches, 377 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2419 ImplicationChecksByTransitivity, 82.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=467occurred in iteration=18, InterpolantAutomatonStates: 264, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 19 MinimizatonAttempts, 176 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 17 LocationsWithAnnotation, 239 PreInvPairs, 476 NumberOfFragments, 955 HoareAnnotationTreeSize, 239 FomulaSimplifications, 30523 FormulaSimplificationTreeSizeReduction, 4.8s HoareSimplificationTime, 17 FomulaSimplificationsInter, 113954 FormulaSimplificationTreeSizeReductionInter, 232.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 25.2s SatisfiabilityAnalysisTime, 88.3s InterpolantComputationTime, 1931 NumberOfCodeBlocks, 1640 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 2593 ConstructedInterpolants, 2 QuantifiedInterpolants, 18226 SizeOfPredicates, 135 NumberOfNonLiveVariables, 3969 ConjunctsInSsa, 678 ConjunctsInUnsatCore, 28 InterpolantComputations, 5 PerfectInterpolantSequences, 11135/11979 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: ((((((((((((0 <= b && !(b == 0)) && yy == y * y) && 1 <= y) && y <= 10) && y * x == xy) && b == x * q + y * s) && 0 <= c) && x <= 10) && 1 <= x) && b < a) && k * b + c == a) && a == x * p + y * r) || (((((((((((((yy == y * y && 1 <= y) && y <= 10) && y * x == xy) && b == x * q + y * s) && 0 <= c) && x <= 10) && r == 0) && q == 0) && 1 <= x) && a == x) && k * b + c == a) && a == x * p + y * r) && s == 1) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: (((((((((((yy == y * y && y <= 10) && y * x == xy) && b == x * q + y * s) && 1 <= b) && x <= 10) && r == 0) && q == 0) && 1 <= x) && a == x) && a == x * p + y * r) && s == 1) || ((((((((((((b <= c || !(c == 0)) || k * x * q + y * k * s == x * p + y * r) && 0 <= b) && yy == y * y) && 1 <= y) && y <= 10) && y * x == xy) && b == x * q + y * s) && x <= 10) && 1 <= x) && b < a) && a == x * p + y * r) RESULT: Ultimate proved your program to be correct! [2021-12-06 19:36:10,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b8415ae-7180-473d-8b56-e0d6a4f4c1b2/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE