./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound20.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_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/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_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/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_d326f9c4-7717-449e-8916-4420baeb1437/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 946e199240c0e980bd422384e40e4d2247ef6b3560471b18ba5a354c3628dba9 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:29:07,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:29:07,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:29:07,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:29:07,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:29:07,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:29:07,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:29:07,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:29:07,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:29:07,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:29:07,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:29:07,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:29:07,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:29:07,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:29:07,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:29:07,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:29:07,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:29:07,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:29:07,441 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:29:07,443 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:29:07,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:29:07,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:29:07,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:29:07,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:29:07,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:29:07,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:29:07,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:29:07,451 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:29:07,452 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:29:07,453 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:29:07,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:29:07,453 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:29:07,454 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:29:07,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:29:07,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:29:07,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:29:07,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:29:07,456 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:29:07,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:29:07,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:29:07,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:29:07,458 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 01:29:07,474 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:29:07,474 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:29:07,475 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:29:07,475 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:29:07,475 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:29:07,475 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:29:07,476 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:29:07,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:29:07,476 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:29:07,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:29:07,476 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 01:29:07,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 01:29:07,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 01:29:07,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:29:07,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 01:29:07,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:29:07,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 01:29:07,477 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 01:29:07,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 01:29:07,477 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:29:07,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 01:29:07,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:29:07,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:29:07,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:29:07,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:29:07,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:29:07,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:29:07,478 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 01:29:07,478 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 01:29:07,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 01:29:07,478 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 01:29:07,479 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 01:29:07,479 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 01:29:07,479 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:29:07,479 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_d326f9c4-7717-449e-8916-4420baeb1437/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 946e199240c0e980bd422384e40e4d2247ef6b3560471b18ba5a354c3628dba9 [2021-12-07 01:29:07,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:29:07,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:29:07,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:29:07,686 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:29:07,686 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:29:07,687 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound20.c [2021-12-07 01:29:07,738 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/data/8439442ee/d1a759b8caa04eea97e584adb3dd1a46/FLAG5ccaff1a8 [2021-12-07 01:29:08,124 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:29:08,124 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound20.c [2021-12-07 01:29:08,130 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/data/8439442ee/d1a759b8caa04eea97e584adb3dd1a46/FLAG5ccaff1a8 [2021-12-07 01:29:08,139 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/data/8439442ee/d1a759b8caa04eea97e584adb3dd1a46 [2021-12-07 01:29:08,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:29:08,142 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:29:08,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:29:08,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:29:08,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:29:08,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:29:08" (1/1) ... [2021-12-07 01:29:08,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3be35672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:08, skipping insertion in model container [2021-12-07 01:29:08,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:29:08" (1/1) ... [2021-12-07 01:29:08,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:29:08,162 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:29:08,278 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_d326f9c4-7717-449e-8916-4420baeb1437/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound20.c[458,471] [2021-12-07 01:29:08,291 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:29:08,297 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:29:08,306 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_d326f9c4-7717-449e-8916-4420baeb1437/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound20.c[458,471] [2021-12-07 01:29:08,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:29:08,320 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:29:08,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:08 WrapperNode [2021-12-07 01:29:08,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:29:08,321 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:29:08,321 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:29:08,321 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:29:08,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:08" (1/1) ... [2021-12-07 01:29:08,332 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:08" (1/1) ... [2021-12-07 01:29:08,344 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2021-12-07 01:29:08,345 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:29:08,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:29:08,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:29:08,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:29:08,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:08" (1/1) ... [2021-12-07 01:29:08,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:08" (1/1) ... [2021-12-07 01:29:08,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:08" (1/1) ... [2021-12-07 01:29:08,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:08" (1/1) ... [2021-12-07 01:29:08,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:08" (1/1) ... [2021-12-07 01:29:08,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:08" (1/1) ... [2021-12-07 01:29:08,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:08" (1/1) ... [2021-12-07 01:29:08,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:29:08,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:29:08,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:29:08,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:29:08,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:08" (1/1) ... [2021-12-07 01:29:08,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:29:08,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:29:08,387 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:29:08,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:29:08,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 01:29:08,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 01:29:08,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:29:08,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:29:08,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-07 01:29:08,425 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-07 01:29:08,473 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:29:08,474 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:29:08,561 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:29:08,566 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:29:08,566 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-07 01:29:08,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:29:08 BoogieIcfgContainer [2021-12-07 01:29:08,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:29:08,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:29:08,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:29:08,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:29:08,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:29:08" (1/3) ... [2021-12-07 01:29:08,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2721481b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:29:08, skipping insertion in model container [2021-12-07 01:29:08,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:08" (2/3) ... [2021-12-07 01:29:08,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2721481b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:29:08, skipping insertion in model container [2021-12-07 01:29:08,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:29:08" (3/3) ... [2021-12-07 01:29:08,576 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound20.c [2021-12-07 01:29:08,582 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:29:08,582 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 01:29:08,621 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:29:08,627 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 [2021-12-07 01:29:08,628 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 01:29:08,640 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:29:08,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-07 01:29:08,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:08,645 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:08,646 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:08,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:08,651 INFO L85 PathProgramCache]: Analyzing trace with hash -579246775, now seen corresponding path program 1 times [2021-12-07 01:29:08,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:08,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446712334] [2021-12-07 01:29:08,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:08,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:29:08,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:08,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446712334] [2021-12-07 01:29:08,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446712334] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:08,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:08,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:29:08,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216744768] [2021-12-07 01:29:08,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:08,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 01:29:08,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:08,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 01:29:08,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 01:29:08,818 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:08,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:08,837 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2021-12-07 01:29:08,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 01:29:08,840 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-07 01:29:08,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:08,846 INFO L225 Difference]: With dead ends: 37 [2021-12-07 01:29:08,847 INFO L226 Difference]: Without dead ends: 16 [2021-12-07 01:29:08,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 01:29:08,854 INFO L933 BasicCegarLoop]: 23 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, 23 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 [2021-12-07 01:29:08,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:29:08,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-07 01:29:08,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-07 01:29:08,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:29:08,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-12-07 01:29:08,887 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2021-12-07 01:29:08,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:08,888 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-12-07 01:29:08,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:08,888 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-12-07 01:29:08,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-07 01:29:08,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:08,889 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:08,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 01:29:08,889 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:08,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:08,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1986551203, now seen corresponding path program 1 times [2021-12-07 01:29:08,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:08,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514949878] [2021-12-07 01:29:08,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:08,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:08,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:08,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:29:08,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:08,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514949878] [2021-12-07 01:29:08,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514949878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:08,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:08,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:29:08,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082995340] [2021-12-07 01:29:08,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:08,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:29:08,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:08,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:29:08,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:29:08,958 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:08,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:08,975 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-12-07 01:29:08,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:29:08,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-07 01:29:08,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:08,977 INFO L225 Difference]: With dead ends: 26 [2021-12-07 01:29:08,977 INFO L226 Difference]: Without dead ends: 18 [2021-12-07 01:29:08,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:29:08,979 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:08,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:29:08,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-07 01:29:08,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-07 01:29:08,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:29:08,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-12-07 01:29:08,985 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 10 [2021-12-07 01:29:08,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:08,986 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-12-07 01:29:08,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:08,986 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-12-07 01:29:08,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-07 01:29:08,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:08,987 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:08,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 01:29:08,987 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:08,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:08,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1984763743, now seen corresponding path program 1 times [2021-12-07 01:29:08,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:08,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256514558] [2021-12-07 01:29:08,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:08,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:08,999 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:29:09,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63135253] [2021-12-07 01:29:09,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:09,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:09,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:29:09,001 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:29:09,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 01:29:09,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:09,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:29:09,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:29:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:29:09,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:29:09,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:09,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256514558] [2021-12-07 01:29:09,122 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:29:09,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63135253] [2021-12-07 01:29:09,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63135253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:09,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:09,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:29:09,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722432466] [2021-12-07 01:29:09,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:09,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:29:09,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:09,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:29:09,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:29:09,124 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:09,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:09,176 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-12-07 01:29:09,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:29:09,176 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-07 01:29:09,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:09,177 INFO L225 Difference]: With dead ends: 28 [2021-12-07 01:29:09,177 INFO L226 Difference]: Without dead ends: 24 [2021-12-07 01:29:09,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:29:09,178 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:09,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 62 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:29:09,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-07 01:29:09,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-07 01:29:09,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:29:09,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-07 01:29:09,184 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2021-12-07 01:29:09,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:09,184 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-07 01:29:09,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:09,185 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-07 01:29:09,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-07 01:29:09,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:09,185 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:09,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:29:09,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:09,388 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:09,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:09,390 INFO L85 PathProgramCache]: Analyzing trace with hash -69803837, now seen corresponding path program 1 times [2021-12-07 01:29:09,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:09,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678674015] [2021-12-07 01:29:09,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:09,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:09,427 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:29:09,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540908393] [2021-12-07 01:29:09,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:09,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:09,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:29:09,432 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:29:09,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 01:29:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:09,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 01:29:09,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:29:09,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:29:09,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:29:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:29:09,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:09,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678674015] [2021-12-07 01:29:09,687 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:29:09,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540908393] [2021-12-07 01:29:09,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540908393] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:29:09,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:29:09,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-12-07 01:29:09,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134154600] [2021-12-07 01:29:09,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:29:09,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 01:29:09,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:09,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 01:29:09,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:29:09,689 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:29:10,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:10,010 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2021-12-07 01:29:10,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 01:29:10,010 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-12-07 01:29:10,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:10,012 INFO L225 Difference]: With dead ends: 58 [2021-12-07 01:29:10,013 INFO L226 Difference]: Without dead ends: 50 [2021-12-07 01:29:10,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:29:10,014 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 41 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:10,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 93 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:29:10,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-07 01:29:10,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-12-07 01:29:10,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-07 01:29:10,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-12-07 01:29:10,022 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 18 [2021-12-07 01:29:10,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:10,022 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-12-07 01:29:10,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:29:10,023 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-12-07 01:29:10,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-07 01:29:10,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:10,023 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:10,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 01:29:10,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:10,225 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:10,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:10,227 INFO L85 PathProgramCache]: Analyzing trace with hash -68016377, now seen corresponding path program 1 times [2021-12-07 01:29:10,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:10,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443918785] [2021-12-07 01:29:10,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:10,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:10,238 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:29:10,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624018869] [2021-12-07 01:29:10,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:10,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:10,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:29:10,240 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:29:10,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 01:29:10,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:10,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-07 01:29:10,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:29:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:29:10,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:29:10,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 01:29:10,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:10,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443918785] [2021-12-07 01:29:10,426 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:29:10,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624018869] [2021-12-07 01:29:10,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624018869] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-07 01:29:10,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:29:10,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-07 01:29:10,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174276423] [2021-12-07 01:29:10,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:10,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:29:10,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:10,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:29:10,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:29:10,432 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-07 01:29:10,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:10,462 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-12-07 01:29:10,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:29:10,462 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-07 01:29:10,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:10,463 INFO L225 Difference]: With dead ends: 60 [2021-12-07 01:29:10,463 INFO L226 Difference]: Without dead ends: 52 [2021-12-07 01:29:10,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:29:10,464 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:10,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 47 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:29:10,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-07 01:29:10,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2021-12-07 01:29:10,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-07 01:29:10,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-12-07 01:29:10,474 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 18 [2021-12-07 01:29:10,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:10,474 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-12-07 01:29:10,475 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-07 01:29:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-12-07 01:29:10,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-07 01:29:10,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:10,476 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:10,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 01:29:10,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:10,678 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:10,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:10,680 INFO L85 PathProgramCache]: Analyzing trace with hash 156635680, now seen corresponding path program 1 times [2021-12-07 01:29:10,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:10,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23025535] [2021-12-07 01:29:10,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:10,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:10,717 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:29:10,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063486879] [2021-12-07 01:29:10,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:10,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:10,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:29:10,721 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:29:10,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 01:29:10,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:10,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-07 01:29:10,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:29:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 01:29:10,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:29:11,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:11,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23025535] [2021-12-07 01:29:11,093 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:29:11,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063486879] [2021-12-07 01:29:11,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063486879] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:29:11,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:29:11,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-07 01:29:11,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441996299] [2021-12-07 01:29:11,093 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:29:11,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:29:11,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:11,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:29:11,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:29:11,094 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:29:11,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:11,149 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2021-12-07 01:29:11,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:29:11,149 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2021-12-07 01:29:11,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:11,151 INFO L225 Difference]: With dead ends: 51 [2021-12-07 01:29:11,151 INFO L226 Difference]: Without dead ends: 45 [2021-12-07 01:29:11,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:29:11,152 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:11,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 111 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:29:11,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-07 01:29:11,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-07 01:29:11,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:29:11,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-12-07 01:29:11,160 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 29 [2021-12-07 01:29:11,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:11,160 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-12-07 01:29:11,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:29:11,161 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-12-07 01:29:11,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-07 01:29:11,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:11,162 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:11,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 01:29:11,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:11,364 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:11,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:11,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1793229318, now seen corresponding path program 2 times [2021-12-07 01:29:11,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:11,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98520239] [2021-12-07 01:29:11,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:11,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:11,397 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:29:11,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882293999] [2021-12-07 01:29:11,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:29:11,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:11,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:29:11,401 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:29:11,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 01:29:11,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:29:11,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:29:11,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-07 01:29:11,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:29:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 01:29:11,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:29:11,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:11,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98520239] [2021-12-07 01:29:11,805 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:29:11,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882293999] [2021-12-07 01:29:11,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882293999] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:29:11,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:29:11,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-12-07 01:29:11,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007653807] [2021-12-07 01:29:11,806 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:29:11,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 01:29:11,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:11,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 01:29:11,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:29:11,807 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 01:29:11,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:11,869 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-12-07 01:29:11,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:29:11,869 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2021-12-07 01:29:11,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:11,870 INFO L225 Difference]: With dead ends: 50 [2021-12-07 01:29:11,870 INFO L226 Difference]: Without dead ends: 44 [2021-12-07 01:29:11,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-07 01:29:11,872 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:11,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 150 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:29:11,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-07 01:29:11,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-07 01:29:11,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-07 01:29:11,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-12-07 01:29:11,881 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2021-12-07 01:29:11,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:11,881 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-12-07 01:29:11,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 01:29:11,881 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-12-07 01:29:11,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-07 01:29:11,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:11,883 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:11,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 01:29:12,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:12,084 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:12,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:12,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1183870932, now seen corresponding path program 3 times [2021-12-07 01:29:12,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:12,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792943360] [2021-12-07 01:29:12,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:12,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:12,109 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:29:12,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358126767] [2021-12-07 01:29:12,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:29:12,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:12,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:29:12,113 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:29:12,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 01:29:12,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-07 01:29:12,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:29:12,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-07 01:29:12,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:29:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-07 01:29:13,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:29:13,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:13,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792943360] [2021-12-07 01:29:13,124 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:29:13,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358126767] [2021-12-07 01:29:13,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358126767] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:29:13,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:29:13,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-12-07 01:29:13,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703348383] [2021-12-07 01:29:13,125 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:29:13,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:29:13,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:13,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:29:13,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:29:13,125 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-07 01:29:13,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:13,198 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-12-07 01:29:13,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:29:13,199 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 45 [2021-12-07 01:29:13,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:13,200 INFO L225 Difference]: With dead ends: 52 [2021-12-07 01:29:13,200 INFO L226 Difference]: Without dead ends: 46 [2021-12-07 01:29:13,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:29:13,201 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:13,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 202 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:29:13,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-07 01:29:13,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-07 01:29:13,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:29:13,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2021-12-07 01:29:13,209 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 45 [2021-12-07 01:29:13,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:13,209 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2021-12-07 01:29:13,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-07 01:29:13,209 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2021-12-07 01:29:13,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-07 01:29:13,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:13,210 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:13,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 01:29:13,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:13,413 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:13,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:13,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1854611729, now seen corresponding path program 1 times [2021-12-07 01:29:13,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:13,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691732321] [2021-12-07 01:29:13,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:13,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:13,440 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:29:13,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299633182] [2021-12-07 01:29:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:13,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:13,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:29:13,444 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:29:13,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 01:29:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:13,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-07 01:29:13,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:29:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 01:29:13,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:29:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-07 01:29:13,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:13,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691732321] [2021-12-07 01:29:13,639 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:29:13,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299633182] [2021-12-07 01:29:13,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299633182] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:29:13,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:29:13,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-12-07 01:29:13,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782740773] [2021-12-07 01:29:13,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:29:13,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 01:29:13,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:13,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 01:29:13,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:29:13,640 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-07 01:29:13,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:13,775 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2021-12-07 01:29:13,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-07 01:29:13,775 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 47 [2021-12-07 01:29:13,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:13,777 INFO L225 Difference]: With dead ends: 132 [2021-12-07 01:29:13,777 INFO L226 Difference]: Without dead ends: 122 [2021-12-07 01:29:13,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2021-12-07 01:29:13,778 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 107 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:13,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 159 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:29:13,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-07 01:29:13,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2021-12-07 01:29:13,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 74 states have internal predecessors, (76), 17 states have call successors, (17), 11 states have call predecessors, (17), 10 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-07 01:29:13,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2021-12-07 01:29:13,789 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 47 [2021-12-07 01:29:13,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:13,789 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2021-12-07 01:29:13,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-07 01:29:13,789 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2021-12-07 01:29:13,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-07 01:29:13,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:13,790 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:13,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 01:29:13,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-07 01:29:13,991 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:13,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:13,991 INFO L85 PathProgramCache]: Analyzing trace with hash 348710830, now seen corresponding path program 4 times [2021-12-07 01:29:13,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:13,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93722410] [2021-12-07 01:29:13,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:13,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:13,997 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:29:13,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729980083] [2021-12-07 01:29:13,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:29:13,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:13,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:29:13,998 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:29:13,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 01:29:14,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:29:14,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:29:14,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-07 01:29:14,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:29:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-07 01:29:14,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:29:14,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:14,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93722410] [2021-12-07 01:29:14,276 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:29:14,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729980083] [2021-12-07 01:29:14,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729980083] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:29:14,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:29:14,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-12-07 01:29:14,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355612480] [2021-12-07 01:29:14,277 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:29:14,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:29:14,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:14,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:29:14,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-07 01:29:14,278 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:29:14,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:14,357 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2021-12-07 01:29:14,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 01:29:14,357 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2021-12-07 01:29:14,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:14,358 INFO L225 Difference]: With dead ends: 102 [2021-12-07 01:29:14,358 INFO L226 Difference]: Without dead ends: 96 [2021-12-07 01:29:14,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-07 01:29:14,359 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:14,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 246 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:29:14,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-07 01:29:14,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-12-07 01:29:14,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 73 states have internal predecessors, (75), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-07 01:29:14,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2021-12-07 01:29:14,370 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 53 [2021-12-07 01:29:14,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:14,370 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2021-12-07 01:29:14,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:29:14,370 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2021-12-07 01:29:14,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-07 01:29:14,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:14,371 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:14,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 01:29:14,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-07 01:29:14,572 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:14,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:14,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1021371784, now seen corresponding path program 5 times [2021-12-07 01:29:14,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:14,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018768591] [2021-12-07 01:29:14,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:14,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:14,582 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:29:14,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821604591] [2021-12-07 01:29:14,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:29:14,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:14,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:29:14,584 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:29:14,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 01:29:15,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-07 01:29:15,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:29:15,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 01:29:15,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:29:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 14 proven. 60 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-07 01:29:15,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:29:15,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:15,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018768591] [2021-12-07 01:29:15,490 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:29:15,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821604591] [2021-12-07 01:29:15,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821604591] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:29:15,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:29:15,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-07 01:29:15,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446121923] [2021-12-07 01:29:15,490 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:29:15,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-07 01:29:15,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:15,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-07 01:29:15,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:29:15,491 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-07 01:29:15,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:15,587 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2021-12-07 01:29:15,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 01:29:15,587 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 61 [2021-12-07 01:29:15,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:15,588 INFO L225 Difference]: With dead ends: 101 [2021-12-07 01:29:15,588 INFO L226 Difference]: Without dead ends: 95 [2021-12-07 01:29:15,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-12-07 01:29:15,589 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:15,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 303 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:29:15,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-07 01:29:15,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-12-07 01:29:15,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 72 states have internal predecessors, (74), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-07 01:29:15,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2021-12-07 01:29:15,598 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 61 [2021-12-07 01:29:15,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:15,598 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2021-12-07 01:29:15,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-07 01:29:15,598 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2021-12-07 01:29:15,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-07 01:29:15,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:15,599 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:15,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-07 01:29:15,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-07 01:29:15,801 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:15,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:15,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1106405730, now seen corresponding path program 6 times [2021-12-07 01:29:15,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:15,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382608413] [2021-12-07 01:29:15,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:15,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:15,827 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:29:15,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310994875] [2021-12-07 01:29:15,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:29:15,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:15,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:29:15,831 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:29:15,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 01:29:16,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-07 01:29:16,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:29:16,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-07 01:29:16,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:29:16,422 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-07 01:29:16,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:29:16,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:16,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382608413] [2021-12-07 01:29:16,533 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:29:16,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310994875] [2021-12-07 01:29:16,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310994875] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:29:16,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:29:16,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-12-07 01:29:16,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834723087] [2021-12-07 01:29:16,533 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:29:16,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 01:29:16,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:16,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 01:29:16,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-12-07 01:29:16,534 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-07 01:29:16,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:16,649 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2021-12-07 01:29:16,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 01:29:16,650 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 69 [2021-12-07 01:29:16,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:16,651 INFO L225 Difference]: With dead ends: 100 [2021-12-07 01:29:16,651 INFO L226 Difference]: Without dead ends: 94 [2021-12-07 01:29:16,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-12-07 01:29:16,652 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:16,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 366 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:29:16,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-07 01:29:16,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-12-07 01:29:16,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 71 states have internal predecessors, (73), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:29:16,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2021-12-07 01:29:16,659 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 69 [2021-12-07 01:29:16,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:16,660 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2021-12-07 01:29:16,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-07 01:29:16,660 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2021-12-07 01:29:16,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-07 01:29:16,661 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:16,661 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:16,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-07 01:29:16,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:16,863 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:16,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:16,864 INFO L85 PathProgramCache]: Analyzing trace with hash -317230276, now seen corresponding path program 7 times [2021-12-07 01:29:16,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:16,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125755503] [2021-12-07 01:29:16,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:16,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:16,889 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:29:16,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194849207] [2021-12-07 01:29:16,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 01:29:16,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:16,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:29:16,893 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:29:16,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 01:29:17,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:17,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-07 01:29:17,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:29:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 18 proven. 112 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-07 01:29:17,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:29:17,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:17,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125755503] [2021-12-07 01:29:17,867 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:29:17,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194849207] [2021-12-07 01:29:17,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194849207] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:29:17,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:29:17,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-12-07 01:29:17,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113102771] [2021-12-07 01:29:17,867 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:29:17,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-07 01:29:17,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:17,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-07 01:29:17,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-12-07 01:29:17,868 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-07 01:29:17,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:17,993 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2021-12-07 01:29:17,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:29:17,994 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 77 [2021-12-07 01:29:17,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:17,995 INFO L225 Difference]: With dead ends: 99 [2021-12-07 01:29:17,995 INFO L226 Difference]: Without dead ends: 93 [2021-12-07 01:29:17,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:29:17,996 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:17,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 435 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:29:17,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-07 01:29:18,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-12-07 01:29:18,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 70 states have internal predecessors, (72), 13 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-07 01:29:18,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2021-12-07 01:29:18,007 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 77 [2021-12-07 01:29:18,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:18,007 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2021-12-07 01:29:18,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-07 01:29:18,007 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2021-12-07 01:29:18,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-07 01:29:18,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:18,009 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:18,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-07 01:29:18,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:18,210 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:18,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:18,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1298793238, now seen corresponding path program 8 times [2021-12-07 01:29:18,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:18,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033403231] [2021-12-07 01:29:18,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:18,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:18,236 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:29:18,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200136427] [2021-12-07 01:29:18,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:29:18,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:18,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:29:18,240 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:29:18,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 01:29:18,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:29:18,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:29:18,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-07 01:29:18,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:29:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-07 01:29:18,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:29:19,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:19,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033403231] [2021-12-07 01:29:19,080 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:29:19,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200136427] [2021-12-07 01:29:19,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200136427] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:29:19,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:29:19,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-12-07 01:29:19,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147618144] [2021-12-07 01:29:19,081 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:29:19,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 01:29:19,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:19,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 01:29:19,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-12-07 01:29:19,082 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-07 01:29:19,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:19,232 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2021-12-07 01:29:19,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-07 01:29:19,232 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 85 [2021-12-07 01:29:19,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:19,233 INFO L225 Difference]: With dead ends: 98 [2021-12-07 01:29:19,233 INFO L226 Difference]: Without dead ends: 92 [2021-12-07 01:29:19,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-12-07 01:29:19,234 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 2 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:19,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 510 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:29:19,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-07 01:29:19,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-12-07 01:29:19,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-07 01:29:19,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2021-12-07 01:29:19,239 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 85 [2021-12-07 01:29:19,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:19,240 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2021-12-07 01:29:19,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-07 01:29:19,240 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2021-12-07 01:29:19,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-07 01:29:19,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:19,241 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:19,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-07 01:29:19,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-07 01:29:19,442 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:19,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:19,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1207691024, now seen corresponding path program 9 times [2021-12-07 01:29:19,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:19,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644208410] [2021-12-07 01:29:19,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:19,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:19,469 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:29:19,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873346575] [2021-12-07 01:29:19,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:29:19,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:19,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:29:19,472 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:29:19,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d326f9c4-7717-449e-8916-4420baeb1437/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process