./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN --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 d4daf1340b92ad99da0e14bd9974ded6768f4e200672f7478b349dd411e40bd7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 10:50:40,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:50:40,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:50:40,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:50:40,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:50:40,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:50:40,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:50:40,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:50:40,154 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:50:40,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:50:40,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:50:40,157 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:50:40,157 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:50:40,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:50:40,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:50:40,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:50:40,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:50:40,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:50:40,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:50:40,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:50:40,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:50:40,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:50:40,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:50:40,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:50:40,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:50:40,174 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:50:40,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:50:40,175 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:50:40,175 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:50:40,176 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:50:40,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:50:40,177 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:50:40,178 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:50:40,179 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:50:40,180 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:50:40,180 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:50:40,181 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:50:40,181 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:50:40,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:50:40,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:50:40,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:50:40,191 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:50:40,224 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:50:40,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:50:40,226 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:50:40,226 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:50:40,227 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:50:40,227 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:50:40,228 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:50:40,228 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:50:40,228 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:50:40,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:50:40,230 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:50:40,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:50:40,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:50:40,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:50:40,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:50:40,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:50:40,231 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:50:40,231 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:50:40,231 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:50:40,231 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:50:40,232 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:50:40,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:50:40,232 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:50:40,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:50:40,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:50:40,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:50:40,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:50:40,233 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:50:40,234 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:50:40,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:50:40,234 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:50:40,234 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:50:40,235 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:50:40,235 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_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4daf1340b92ad99da0e14bd9974ded6768f4e200672f7478b349dd411e40bd7 [2022-11-20 10:50:40,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:50:40,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:50:40,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:50:40,484 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:50:40,485 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:50:40,486 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c [2022-11-20 10:50:43,731 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:50:44,049 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:50:44,050 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c [2022-11-20 10:50:44,063 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/data/b0a4a4717/a68c4fd054f04f2291daa4609e8c6782/FLAG46cd039a1 [2022-11-20 10:50:44,094 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/data/b0a4a4717/a68c4fd054f04f2291daa4609e8c6782 [2022-11-20 10:50:44,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:50:44,103 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:50:44,106 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:50:44,106 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:50:44,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:50:44,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:44" (1/1) ... [2022-11-20 10:50:44,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5716a554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:44, skipping insertion in model container [2022-11-20 10:50:44,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:44" (1/1) ... [2022-11-20 10:50:44,122 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:50:44,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:50:44,313 WARN L237 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_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c[490,503] [2022-11-20 10:50:44,358 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:50:44,368 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:50:44,382 WARN L237 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_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c[490,503] [2022-11-20 10:50:44,413 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:50:44,436 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:50:44,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:44 WrapperNode [2022-11-20 10:50:44,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:50:44,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:50:44,438 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:50:44,438 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:50:44,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:44" (1/1) ... [2022-11-20 10:50:44,455 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:44" (1/1) ... [2022-11-20 10:50:44,484 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 91 [2022-11-20 10:50:44,485 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:50:44,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:50:44,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:50:44,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:50:44,496 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:44" (1/1) ... [2022-11-20 10:50:44,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:44" (1/1) ... [2022-11-20 10:50:44,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:44" (1/1) ... [2022-11-20 10:50:44,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:44" (1/1) ... [2022-11-20 10:50:44,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:44" (1/1) ... [2022-11-20 10:50:44,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:44" (1/1) ... [2022-11-20 10:50:44,517 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:44" (1/1) ... [2022-11-20 10:50:44,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:44" (1/1) ... [2022-11-20 10:50:44,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:50:44,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:50:44,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:50:44,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:50:44,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:44" (1/1) ... [2022-11-20 10:50:44,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:50:44,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:44,568 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:50:44,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:50:44,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:50:44,620 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-20 10:50:44,620 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-20 10:50:44,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:50:44,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:50:44,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:50:44,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 10:50:44,621 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 10:50:44,704 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:50:44,707 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:50:44,939 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:50:44,946 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:50:44,946 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 10:50:44,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:44 BoogieIcfgContainer [2022-11-20 10:50:44,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:50:44,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:50:44,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:50:44,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:50:44,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:50:44" (1/3) ... [2022-11-20 10:50:44,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ca4d5dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:50:44, skipping insertion in model container [2022-11-20 10:50:44,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:44" (2/3) ... [2022-11-20 10:50:44,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ca4d5dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:50:44, skipping insertion in model container [2022-11-20 10:50:44,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:44" (3/3) ... [2022-11-20 10:50:44,959 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound100.c [2022-11-20 10:50:44,992 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:50:45,006 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:50:45,072 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:50:45,083 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@77b0ef7a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:50:45,083 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 10:50:45,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-20 10:50:45,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 10:50:45,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:45,105 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:45,105 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:45,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:45,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1663185933, now seen corresponding path program 1 times [2022-11-20 10:50:45,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:45,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174459147] [2022-11-20 10:50:45,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:45,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:45,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:45,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174459147] [2022-11-20 10:50:45,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-20 10:50:45,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076792236] [2022-11-20 10:50:45,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:45,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:45,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:45,297 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:45,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:50:45,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:45,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-20 10:50:45,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:45,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:50:45,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:50:45,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076792236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:50:45,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:50:45,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:50:45,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667695336] [2022-11-20 10:50:45,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:50:45,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:50:45,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:45,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:50:45,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:50:45,537 INFO L87 Difference]: Start difference. First operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:50:45,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:45,600 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2022-11-20 10:50:45,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:50:45,607 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-11-20 10:50:45,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:45,617 INFO L225 Difference]: With dead ends: 67 [2022-11-20 10:50:45,617 INFO L226 Difference]: Without dead ends: 31 [2022-11-20 10:50:45,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:50:45,630 INFO L413 NwaCegarLoop]: 45 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, 45 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 [2022-11-20 10:50:45,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:50:45,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-20 10:50:45,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-20 10:50:45,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 10:50:45,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-11-20 10:50:45,705 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 18 [2022-11-20 10:50:45,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:45,706 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-11-20 10:50:45,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:50:45,707 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-11-20 10:50:45,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 10:50:45,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:45,710 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:45,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:45,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-20 10:50:45,918 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:45,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:45,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1013747788, now seen corresponding path program 1 times [2022-11-20 10:50:45,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:45,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423083813] [2022-11-20 10:50:45,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:45,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:45,940 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:50:45,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477384029] [2022-11-20 10:50:45,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:45,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:45,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:45,942 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:45,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:50:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:46,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 10:50:46,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:50:46,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:50:46,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:46,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423083813] [2022-11-20 10:50:46,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:50:46,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477384029] [2022-11-20 10:50:46,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477384029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:50:46,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:50:46,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:50:46,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847924409] [2022-11-20 10:50:46,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:50:46,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:50:46,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:46,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:50:46,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:50:46,106 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 10:50:46,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:46,141 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-11-20 10:50:46,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:50:46,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-11-20 10:50:46,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:46,144 INFO L225 Difference]: With dead ends: 40 [2022-11-20 10:50:46,145 INFO L226 Difference]: Without dead ends: 33 [2022-11-20 10:50:46,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:50:46,148 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:46,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:50:46,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-20 10:50:46,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-20 10:50:46,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 10:50:46,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-11-20 10:50:46,164 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2022-11-20 10:50:46,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:46,166 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-11-20 10:50:46,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 10:50:46,167 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-11-20 10:50:46,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 10:50:46,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:46,170 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:46,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:46,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:46,377 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:46,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:46,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1341775226, now seen corresponding path program 1 times [2022-11-20 10:50:46,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:46,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874424418] [2022-11-20 10:50:46,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:46,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:46,406 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:50:46,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732686690] [2022-11-20 10:50:46,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:46,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:46,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:46,408 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:46,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:50:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:46,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 10:50:46,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:46,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:50:46,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:50:46,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:46,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874424418] [2022-11-20 10:50:46,585 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:50:46,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732686690] [2022-11-20 10:50:46,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732686690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:50:46,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:50:46,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 10:50:46,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176747475] [2022-11-20 10:50:46,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:50:46,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:50:46,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:46,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:50:46,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:50:46,588 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 10:50:46,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:46,724 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2022-11-20 10:50:46,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:50:46,725 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-11-20 10:50:46,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:46,732 INFO L225 Difference]: With dead ends: 53 [2022-11-20 10:50:46,734 INFO L226 Difference]: Without dead ends: 46 [2022-11-20 10:50:46,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:50:46,736 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:46,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 128 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:46,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-20 10:50:46,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2022-11-20 10:50:46,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 10:50:46,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2022-11-20 10:50:46,757 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2022-11-20 10:50:46,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:46,758 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2022-11-20 10:50:46,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 10:50:46,759 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2022-11-20 10:50:46,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 10:50:46,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:46,761 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:46,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:46,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:46,968 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:46,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:46,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1315139464, now seen corresponding path program 1 times [2022-11-20 10:50:46,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:46,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713227607] [2022-11-20 10:50:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:46,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:46,993 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:50:46,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663169758] [2022-11-20 10:50:46,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:46,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:46,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:47,013 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:47,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:50:47,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:47,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:50:47,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:50:47,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:50:47,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:47,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713227607] [2022-11-20 10:50:47,202 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:50:47,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663169758] [2022-11-20 10:50:47,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663169758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:50:47,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:50:47,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:50:47,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323402000] [2022-11-20 10:50:47,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:50:47,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:50:47,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:47,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:50:47,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:50:47,205 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 10:50:47,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:47,266 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2022-11-20 10:50:47,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:50:47,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-11-20 10:50:47,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:47,271 INFO L225 Difference]: With dead ends: 58 [2022-11-20 10:50:47,271 INFO L226 Difference]: Without dead ends: 36 [2022-11-20 10:50:47,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:50:47,273 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:47,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 128 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:50:47,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-20 10:50:47,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-20 10:50:47,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 10:50:47,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2022-11-20 10:50:47,282 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 25 [2022-11-20 10:50:47,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:47,289 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2022-11-20 10:50:47,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 10:50:47,294 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2022-11-20 10:50:47,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 10:50:47,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:47,295 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:47,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:47,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:47,503 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:47,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:47,504 INFO L85 PathProgramCache]: Analyzing trace with hash 570907173, now seen corresponding path program 1 times [2022-11-20 10:50:47,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:47,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839728645] [2022-11-20 10:50:47,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:47,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:47,524 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:50:47,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071607918] [2022-11-20 10:50:47,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:47,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:47,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:47,526 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:47,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:50:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:47,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:50:47,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:50:47,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:50:47,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:47,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839728645] [2022-11-20 10:50:47,897 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:50:47,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071607918] [2022-11-20 10:50:47,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071607918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:50:47,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:50:47,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 10:50:47,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750873707] [2022-11-20 10:50:47,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:50:47,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 10:50:47,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:47,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 10:50:47,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:50:47,900 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 10:50:48,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:48,043 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2022-11-20 10:50:48,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:50:48,044 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-11-20 10:50:48,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:48,045 INFO L225 Difference]: With dead ends: 54 [2022-11-20 10:50:48,045 INFO L226 Difference]: Without dead ends: 52 [2022-11-20 10:50:48,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:50:48,047 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 73 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:48,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 176 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:48,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-20 10:50:48,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-11-20 10:50:48,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 37 states have internal predecessors, (47), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 10:50:48,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2022-11-20 10:50:48,060 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 25 [2022-11-20 10:50:48,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:48,061 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2022-11-20 10:50:48,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 10:50:48,061 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2022-11-20 10:50:48,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 10:50:48,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:48,062 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:48,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:48,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:48,269 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:48,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:48,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1698298847, now seen corresponding path program 1 times [2022-11-20 10:50:48,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:48,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182350130] [2022-11-20 10:50:48,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:48,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:48,299 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:50:48,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088849779] [2022-11-20 10:50:48,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:48,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:48,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:48,301 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:48,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:50:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:48,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 10:50:48,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:48,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:50:48,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:50:48,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:48,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182350130] [2022-11-20 10:50:48,520 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:50:48,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088849779] [2022-11-20 10:50:48,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088849779] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:48,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:50:48,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-11-20 10:50:48,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771434232] [2022-11-20 10:50:48,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:48,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:50:48,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:48,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:50:48,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:50:48,523 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 10:50:48,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:48,761 INFO L93 Difference]: Finished difference Result 147 states and 193 transitions. [2022-11-20 10:50:48,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:50:48,762 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2022-11-20 10:50:48,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:48,771 INFO L225 Difference]: With dead ends: 147 [2022-11-20 10:50:48,771 INFO L226 Difference]: Without dead ends: 140 [2022-11-20 10:50:48,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:50:48,772 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 95 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:48,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 234 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:50:48,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-20 10:50:48,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 97. [2022-11-20 10:50:48,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 71 states have internal predecessors, (92), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-20 10:50:48,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 130 transitions. [2022-11-20 10:50:48,803 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 130 transitions. Word has length 26 [2022-11-20 10:50:48,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:48,803 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 130 transitions. [2022-11-20 10:50:48,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 10:50:48,804 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 130 transitions. [2022-11-20 10:50:48,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 10:50:48,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:48,805 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:48,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:49,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:49,006 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:49,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:49,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1127291835, now seen corresponding path program 1 times [2022-11-20 10:50:49,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:49,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242334109] [2022-11-20 10:50:49,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:49,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:49,021 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:50:49,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87666676] [2022-11-20 10:50:49,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:49,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:49,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:49,034 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:49,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:50:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:49,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:50:49,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:49,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:50:49,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:50:49,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:49,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242334109] [2022-11-20 10:50:49,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:50:49,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87666676] [2022-11-20 10:50:49,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87666676] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:49,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:50:49,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-20 10:50:49,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907154325] [2022-11-20 10:50:49,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:49,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 10:50:49,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:49,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 10:50:49,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:50:49,292 INFO L87 Difference]: Start difference. First operand 97 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:50:49,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:49,566 INFO L93 Difference]: Finished difference Result 183 states and 261 transitions. [2022-11-20 10:50:49,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:50:49,569 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-11-20 10:50:49,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:49,573 INFO L225 Difference]: With dead ends: 183 [2022-11-20 10:50:49,573 INFO L226 Difference]: Without dead ends: 171 [2022-11-20 10:50:49,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:50:49,577 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 122 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:49,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 325 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:50:49,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-20 10:50:49,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 128. [2022-11-20 10:50:49,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 97 states have (on average 1.3505154639175259) internal successors, (131), 98 states have internal predecessors, (131), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-20 10:50:49,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 176 transitions. [2022-11-20 10:50:49,639 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 176 transitions. Word has length 27 [2022-11-20 10:50:49,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:49,640 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 176 transitions. [2022-11-20 10:50:49,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:50:49,640 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 176 transitions. [2022-11-20 10:50:49,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 10:50:49,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:49,646 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:49,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:49,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 10:50:49,848 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:49,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:49,858 INFO L85 PathProgramCache]: Analyzing trace with hash -200071253, now seen corresponding path program 1 times [2022-11-20 10:50:49,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:49,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108543247] [2022-11-20 10:50:49,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:49,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:49,880 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:50:49,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640643200] [2022-11-20 10:50:49,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:49,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:49,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:49,887 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:49,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 10:50:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:49,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 10:50:49,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:50:50,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:50,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:50,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108543247] [2022-11-20 10:50:50,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:50:50,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640643200] [2022-11-20 10:50:50,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640643200] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:50,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:50:50,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-11-20 10:50:50,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90171151] [2022-11-20 10:50:50,168 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:50,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:50:50,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:50,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:50:50,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:50:50,170 INFO L87 Difference]: Start difference. First operand 128 states and 176 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 10:50:50,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:50,295 INFO L93 Difference]: Finished difference Result 143 states and 190 transitions. [2022-11-20 10:50:50,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:50:50,295 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-11-20 10:50:50,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:50,297 INFO L225 Difference]: With dead ends: 143 [2022-11-20 10:50:50,297 INFO L226 Difference]: Without dead ends: 141 [2022-11-20 10:50:50,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:50:50,298 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:50,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 153 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:50,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-20 10:50:50,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2022-11-20 10:50:50,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 106 states have (on average 1.320754716981132) internal successors, (140), 107 states have internal predecessors, (140), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-20 10:50:50,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2022-11-20 10:50:50,322 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 30 [2022-11-20 10:50:50,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:50,322 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2022-11-20 10:50:50,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 10:50:50,323 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2022-11-20 10:50:50,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 10:50:50,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:50,324 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:50,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:50,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 10:50:50,529 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:50,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:50,530 INFO L85 PathProgramCache]: Analyzing trace with hash 164485690, now seen corresponding path program 1 times [2022-11-20 10:50:50,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:50,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329069234] [2022-11-20 10:50:50,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:50,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:50,542 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:50:50,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [718586086] [2022-11-20 10:50:50,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:50,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:50,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:50,544 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:50,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 10:50:50,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:50,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 10:50:50,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:50,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:50:50,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:50:50,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:50,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329069234] [2022-11-20 10:50:50,980 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:50:50,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718586086] [2022-11-20 10:50:50,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718586086] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:50,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:50:50,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2022-11-20 10:50:50,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835361441] [2022-11-20 10:50:50,983 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:50,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:50:50,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:50,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:50:50,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:50:50,988 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 10:50:51,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:51,362 INFO L93 Difference]: Finished difference Result 183 states and 251 transitions. [2022-11-20 10:50:51,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:50:51,362 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-11-20 10:50:51,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:51,364 INFO L225 Difference]: With dead ends: 183 [2022-11-20 10:50:51,364 INFO L226 Difference]: Without dead ends: 181 [2022-11-20 10:50:51,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:50:51,365 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 124 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:51,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 343 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:50:51,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-20 10:50:51,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 170. [2022-11-20 10:50:51,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3464566929133859) internal successors, (171), 128 states have internal predecessors, (171), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-20 10:50:51,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 232 transitions. [2022-11-20 10:50:51,397 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 232 transitions. Word has length 32 [2022-11-20 10:50:51,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:51,398 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 232 transitions. [2022-11-20 10:50:51,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 10:50:51,398 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 232 transitions. [2022-11-20 10:50:51,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 10:50:51,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:51,399 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:51,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:51,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:51,605 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:51,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:51,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1985711111, now seen corresponding path program 1 times [2022-11-20 10:50:51,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:51,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072083811] [2022-11-20 10:50:51,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:51,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:51,619 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:50:51,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447508473] [2022-11-20 10:50:51,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:51,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:51,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:51,621 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:51,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 10:50:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:51,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 10:50:51,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:50:51,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:50:51,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:51,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072083811] [2022-11-20 10:50:51,738 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:50:51,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447508473] [2022-11-20 10:50:51,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447508473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:50:51,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:50:51,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:50:51,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386800603] [2022-11-20 10:50:51,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:50:51,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:50:51,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:51,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:50:51,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:50:51,740 INFO L87 Difference]: Start difference. First operand 170 states and 232 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 10:50:51,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:51,791 INFO L93 Difference]: Finished difference Result 237 states and 325 transitions. [2022-11-20 10:50:51,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:50:51,792 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2022-11-20 10:50:51,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:51,793 INFO L225 Difference]: With dead ends: 237 [2022-11-20 10:50:51,793 INFO L226 Difference]: Without dead ends: 170 [2022-11-20 10:50:51,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:50:51,795 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:51,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 128 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:50:51,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-20 10:50:51,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-11-20 10:50:51,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3385826771653544) internal successors, (170), 128 states have internal predecessors, (170), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-20 10:50:51,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 231 transitions. [2022-11-20 10:50:51,825 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 231 transitions. Word has length 32 [2022-11-20 10:50:51,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:51,825 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 231 transitions. [2022-11-20 10:50:51,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 10:50:51,825 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 231 transitions. [2022-11-20 10:50:51,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 10:50:51,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:51,826 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:51,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:52,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 10:50:52,032 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:52,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:52,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1730540965, now seen corresponding path program 1 times [2022-11-20 10:50:52,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:52,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343653542] [2022-11-20 10:50:52,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:52,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:52,049 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:50:52,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1840221103] [2022-11-20 10:50:52,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:52,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:52,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:52,058 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:52,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 10:50:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:52,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 10:50:52,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 10:50:52,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 10:50:52,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:52,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343653542] [2022-11-20 10:50:52,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:50:52,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840221103] [2022-11-20 10:50:52,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840221103] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:52,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:50:52,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2022-11-20 10:50:52,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452900584] [2022-11-20 10:50:52,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:50:52,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:50:52,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:52,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:50:52,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:50:52,326 INFO L87 Difference]: Start difference. First operand 170 states and 231 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 10:50:52,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:52,433 INFO L93 Difference]: Finished difference Result 235 states and 331 transitions. [2022-11-20 10:50:52,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:50:52,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-11-20 10:50:52,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:52,436 INFO L225 Difference]: With dead ends: 235 [2022-11-20 10:50:52,436 INFO L226 Difference]: Without dead ends: 233 [2022-11-20 10:50:52,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:50:52,438 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 14 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:52,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 160 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:50:52,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-20 10:50:52,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2022-11-20 10:50:52,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 160 states have (on average 1.36875) internal successors, (219), 161 states have internal predecessors, (219), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-20 10:50:52,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 320 transitions. [2022-11-20 10:50:52,495 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 320 transitions. Word has length 35 [2022-11-20 10:50:52,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:52,495 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 320 transitions. [2022-11-20 10:50:52,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 10:50:52,495 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 320 transitions. [2022-11-20 10:50:52,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 10:50:52,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:52,496 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:52,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:52,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:52,703 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:52,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:52,703 INFO L85 PathProgramCache]: Analyzing trace with hash -2009961290, now seen corresponding path program 1 times [2022-11-20 10:50:52,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:52,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103480780] [2022-11-20 10:50:52,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:52,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:52,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:50:52,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252422821] [2022-11-20 10:50:52,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:52,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:52,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:52,715 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:52,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 10:50:52,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:52,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-20 10:50:52,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:50:53,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:50:53,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:53,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103480780] [2022-11-20 10:50:53,748 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:50:53,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252422821] [2022-11-20 10:50:53,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252422821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:53,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:50:53,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 20 [2022-11-20 10:50:53,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818785225] [2022-11-20 10:50:53,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:53,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 10:50:53,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:53,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 10:50:53,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-11-20 10:50:53,751 INFO L87 Difference]: Start difference. First operand 226 states and 320 transitions. Second operand has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 10:50:58,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:58,415 INFO L93 Difference]: Finished difference Result 529 states and 784 transitions. [2022-11-20 10:50:58,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 10:50:58,416 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 37 [2022-11-20 10:50:58,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:58,421 INFO L225 Difference]: With dead ends: 529 [2022-11-20 10:50:58,421 INFO L226 Difference]: Without dead ends: 527 [2022-11-20 10:50:58,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 10:50:58,423 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 248 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:58,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 531 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 675 Invalid, 0 Unknown, 218 Unchecked, 2.1s Time] [2022-11-20 10:50:58,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-11-20 10:50:58,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 448. [2022-11-20 10:50:58,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 344 states have (on average 1.436046511627907) internal successors, (494), 355 states have internal predecessors, (494), 87 states have call successors, (87), 16 states have call predecessors, (87), 16 states have return successors, (86), 76 states have call predecessors, (86), 86 states have call successors, (86) [2022-11-20 10:50:58,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 667 transitions. [2022-11-20 10:50:58,550 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 667 transitions. Word has length 37 [2022-11-20 10:50:58,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:58,550 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 667 transitions. [2022-11-20 10:50:58,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 10:50:58,551 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 667 transitions. [2022-11-20 10:50:58,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 10:50:58,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:58,553 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:58,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:58,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:58,758 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:58,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:58,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1954288725, now seen corresponding path program 1 times [2022-11-20 10:50:58,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:58,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91857680] [2022-11-20 10:50:58,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:58,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:58,769 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:50:58,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962708349] [2022-11-20 10:50:58,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:58,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:58,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:58,770 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:58,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 10:50:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:58,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 10:50:58,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:58,912 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 10:50:58,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:59,098 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 10:50:59,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:59,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91857680] [2022-11-20 10:50:59,099 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:50:59,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962708349] [2022-11-20 10:50:59,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962708349] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:59,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:50:59,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2022-11-20 10:50:59,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101423222] [2022-11-20 10:50:59,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:50:59,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:50:59,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:59,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:50:59,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:50:59,101 INFO L87 Difference]: Start difference. First operand 448 states and 667 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 10:50:59,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:59,249 INFO L93 Difference]: Finished difference Result 459 states and 677 transitions. [2022-11-20 10:50:59,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:50:59,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2022-11-20 10:50:59,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:59,252 INFO L225 Difference]: With dead ends: 459 [2022-11-20 10:50:59,252 INFO L226 Difference]: Without dead ends: 457 [2022-11-20 10:50:59,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:50:59,254 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 11 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:59,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 130 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:50:59,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-11-20 10:50:59,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 452. [2022-11-20 10:50:59,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 347 states have (on average 1.4265129682997117) internal successors, (495), 358 states have internal predecessors, (495), 87 states have call successors, (87), 17 states have call predecessors, (87), 17 states have return successors, (86), 76 states have call predecessors, (86), 86 states have call successors, (86) [2022-11-20 10:50:59,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 668 transitions. [2022-11-20 10:50:59,370 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 668 transitions. Word has length 40 [2022-11-20 10:50:59,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:59,371 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 668 transitions. [2022-11-20 10:50:59,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 10:50:59,371 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 668 transitions. [2022-11-20 10:50:59,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 10:50:59,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:59,372 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:59,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:59,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 10:50:59,582 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:59,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:59,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1977082887, now seen corresponding path program 1 times [2022-11-20 10:50:59,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:59,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478860312] [2022-11-20 10:50:59,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:59,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:59,592 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:50:59,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174325378] [2022-11-20 10:50:59,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:59,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:59,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:59,594 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:59,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 10:50:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:59,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:50:59,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:50:59,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:59,797 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:50:59,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:59,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478860312] [2022-11-20 10:50:59,798 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:50:59,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174325378] [2022-11-20 10:50:59,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174325378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:59,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:50:59,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2022-11-20 10:50:59,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868363502] [2022-11-20 10:50:59,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:59,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:50:59,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:59,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:50:59,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:50:59,800 INFO L87 Difference]: Start difference. First operand 452 states and 668 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 10:51:00,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:00,185 INFO L93 Difference]: Finished difference Result 1062 states and 1545 transitions. [2022-11-20 10:51:00,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 10:51:00,186 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2022-11-20 10:51:00,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:00,189 INFO L225 Difference]: With dead ends: 1062 [2022-11-20 10:51:00,189 INFO L226 Difference]: Without dead ends: 741 [2022-11-20 10:51:00,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:51:00,191 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 148 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:00,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 275 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:51:00,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-11-20 10:51:00,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 711. [2022-11-20 10:51:00,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 531 states have (on average 1.3578154425612052) internal successors, (721), 545 states have internal predecessors, (721), 138 states have call successors, (138), 41 states have call predecessors, (138), 41 states have return successors, (134), 124 states have call predecessors, (134), 134 states have call successors, (134) [2022-11-20 10:51:00,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 993 transitions. [2022-11-20 10:51:00,338 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 993 transitions. Word has length 38 [2022-11-20 10:51:00,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:00,338 INFO L495 AbstractCegarLoop]: Abstraction has 711 states and 993 transitions. [2022-11-20 10:51:00,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 10:51:00,339 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 993 transitions. [2022-11-20 10:51:00,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 10:51:00,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:00,339 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:00,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:00,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 10:51:00,545 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:00,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:00,545 INFO L85 PathProgramCache]: Analyzing trace with hash 321915013, now seen corresponding path program 2 times [2022-11-20 10:51:00,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:00,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120784407] [2022-11-20 10:51:00,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:00,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:00,553 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:51:00,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737993471] [2022-11-20 10:51:00,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:51:00,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:00,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:00,559 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:00,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 10:51:00,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:51:00,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:00,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:51:00,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:00,670 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:51:00,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:00,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:00,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120784407] [2022-11-20 10:51:00,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:51:00,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737993471] [2022-11-20 10:51:00,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737993471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:00,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:00,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:51:00,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306036770] [2022-11-20 10:51:00,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:00,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:51:00,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:00,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:51:00,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:51:00,673 INFO L87 Difference]: Start difference. First operand 711 states and 993 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 10:51:00,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:00,972 INFO L93 Difference]: Finished difference Result 1267 states and 1851 transitions. [2022-11-20 10:51:00,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:51:00,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2022-11-20 10:51:00,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:00,978 INFO L225 Difference]: With dead ends: 1267 [2022-11-20 10:51:00,978 INFO L226 Difference]: Without dead ends: 944 [2022-11-20 10:51:00,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:51:00,980 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 30 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:00,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 153 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:51:00,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-11-20 10:51:01,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 726. [2022-11-20 10:51:01,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 550 states have (on average 1.3581818181818182) internal successors, (747), 564 states have internal predecessors, (747), 134 states have call successors, (134), 41 states have call predecessors, (134), 41 states have return successors, (130), 120 states have call predecessors, (130), 130 states have call successors, (130) [2022-11-20 10:51:01,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1011 transitions. [2022-11-20 10:51:01,154 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1011 transitions. Word has length 39 [2022-11-20 10:51:01,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:01,155 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 1011 transitions. [2022-11-20 10:51:01,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 10:51:01,155 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1011 transitions. [2022-11-20 10:51:01,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 10:51:01,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:01,156 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:01,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:01,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 10:51:01,362 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:01,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:01,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1715872859, now seen corresponding path program 1 times [2022-11-20 10:51:01,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:01,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887637562] [2022-11-20 10:51:01,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:01,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:01,375 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:51:01,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536771097] [2022-11-20 10:51:01,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:01,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:01,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:01,377 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:01,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 10:51:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:01,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 10:51:01,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:01,520 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:51:01,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:51:01,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:01,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887637562] [2022-11-20 10:51:01,647 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:51:01,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536771097] [2022-11-20 10:51:01,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536771097] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:01,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:51:01,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-20 10:51:01,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88547466] [2022-11-20 10:51:01,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:01,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:51:01,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:01,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:51:01,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:51:01,649 INFO L87 Difference]: Start difference. First operand 726 states and 1011 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 10:51:02,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:02,175 INFO L93 Difference]: Finished difference Result 1318 states and 1828 transitions. [2022-11-20 10:51:02,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 10:51:02,176 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2022-11-20 10:51:02,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:02,179 INFO L225 Difference]: With dead ends: 1318 [2022-11-20 10:51:02,179 INFO L226 Difference]: Without dead ends: 817 [2022-11-20 10:51:02,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2022-11-20 10:51:02,181 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 263 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:02,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 281 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:51:02,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-11-20 10:51:02,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 780. [2022-11-20 10:51:02,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 558 states have (on average 1.2724014336917562) internal successors, (710), 572 states have internal predecessors, (710), 164 states have call successors, (164), 57 states have call predecessors, (164), 57 states have return successors, (158), 150 states have call predecessors, (158), 158 states have call successors, (158) [2022-11-20 10:51:02,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1032 transitions. [2022-11-20 10:51:02,367 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1032 transitions. Word has length 39 [2022-11-20 10:51:02,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:02,367 INFO L495 AbstractCegarLoop]: Abstraction has 780 states and 1032 transitions. [2022-11-20 10:51:02,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 10:51:02,368 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1032 transitions. [2022-11-20 10:51:02,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-20 10:51:02,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:02,369 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:02,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:02,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 10:51:02,574 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:02,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:02,575 INFO L85 PathProgramCache]: Analyzing trace with hash 753696694, now seen corresponding path program 1 times [2022-11-20 10:51:02,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:02,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375033426] [2022-11-20 10:51:02,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:02,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:02,584 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:51:02,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075422038] [2022-11-20 10:51:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:02,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:02,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:02,586 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:02,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 10:51:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:02,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-20 10:51:02,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 10:51:03,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 10:51:05,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:05,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375033426] [2022-11-20 10:51:05,140 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:51:05,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075422038] [2022-11-20 10:51:05,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075422038] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:05,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:51:05,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2022-11-20 10:51:05,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974261702] [2022-11-20 10:51:05,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:05,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 10:51:05,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:05,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 10:51:05,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-11-20 10:51:05,142 INFO L87 Difference]: Start difference. First operand 780 states and 1032 transitions. Second operand has 26 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-20 10:51:22,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:22,453 INFO L93 Difference]: Finished difference Result 1403 states and 1876 transitions. [2022-11-20 10:51:22,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 10:51:22,454 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 54 [2022-11-20 10:51:22,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:22,459 INFO L225 Difference]: With dead ends: 1403 [2022-11-20 10:51:22,459 INFO L226 Difference]: Without dead ends: 1060 [2022-11-20 10:51:22,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=523, Invalid=2447, Unknown=0, NotChecked=0, Total=2970 [2022-11-20 10:51:22,462 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 280 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:22,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 702 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 1579 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-11-20 10:51:22,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2022-11-20 10:51:22,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 909. [2022-11-20 10:51:22,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 664 states have (on average 1.2725903614457832) internal successors, (845), 673 states have internal predecessors, (845), 180 states have call successors, (180), 64 states have call predecessors, (180), 64 states have return successors, (176), 171 states have call predecessors, (176), 176 states have call successors, (176) [2022-11-20 10:51:22,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1201 transitions. [2022-11-20 10:51:22,811 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1201 transitions. Word has length 54 [2022-11-20 10:51:22,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:22,812 INFO L495 AbstractCegarLoop]: Abstraction has 909 states and 1201 transitions. [2022-11-20 10:51:22,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-20 10:51:22,812 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1201 transitions. [2022-11-20 10:51:22,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 10:51:22,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:22,813 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:22,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:23,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 10:51:23,024 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:23,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:23,025 INFO L85 PathProgramCache]: Analyzing trace with hash -2108492507, now seen corresponding path program 1 times [2022-11-20 10:51:23,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:23,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400976409] [2022-11-20 10:51:23,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:23,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:23,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:51:23,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1699310377] [2022-11-20 10:51:23,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:23,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:23,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:23,044 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:23,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 10:51:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:23,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 10:51:23,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:23,253 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 10:51:23,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 10:51:23,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:23,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400976409] [2022-11-20 10:51:23,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:51:23,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699310377] [2022-11-20 10:51:23,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699310377] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:23,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:51:23,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2022-11-20 10:51:23,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831888466] [2022-11-20 10:51:23,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:23,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:51:23,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:23,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:51:23,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:51:23,432 INFO L87 Difference]: Start difference. First operand 909 states and 1201 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-20 10:51:24,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:24,573 INFO L93 Difference]: Finished difference Result 2055 states and 2844 transitions. [2022-11-20 10:51:24,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 10:51:24,573 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 60 [2022-11-20 10:51:24,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:24,582 INFO L225 Difference]: With dead ends: 2055 [2022-11-20 10:51:24,582 INFO L226 Difference]: Without dead ends: 2033 [2022-11-20 10:51:24,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2022-11-20 10:51:24,584 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 382 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:24,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 490 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:51:24,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2022-11-20 10:51:25,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 1919. [2022-11-20 10:51:25,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1425 states have (on average 1.2947368421052632) internal successors, (1845), 1457 states have internal predecessors, (1845), 389 states have call successors, (389), 104 states have call predecessors, (389), 104 states have return successors, (382), 357 states have call predecessors, (382), 382 states have call successors, (382) [2022-11-20 10:51:25,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 2616 transitions. [2022-11-20 10:51:25,290 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 2616 transitions. Word has length 60 [2022-11-20 10:51:25,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:25,291 INFO L495 AbstractCegarLoop]: Abstraction has 1919 states and 2616 transitions. [2022-11-20 10:51:25,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-20 10:51:25,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 2616 transitions. [2022-11-20 10:51:25,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-20 10:51:25,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:25,292 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:25,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:25,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 10:51:25,498 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:25,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:25,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1447364546, now seen corresponding path program 1 times [2022-11-20 10:51:25,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:25,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403117724] [2022-11-20 10:51:25,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:25,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:25,505 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:51:25,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920867291] [2022-11-20 10:51:25,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:25,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:25,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:25,507 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:25,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 10:51:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:25,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 10:51:25,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:26,533 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 10:51:26,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 10:51:27,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:27,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403117724] [2022-11-20 10:51:27,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:51:27,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920867291] [2022-11-20 10:51:27,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920867291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:27,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:51:27,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2022-11-20 10:51:27,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125208223] [2022-11-20 10:51:27,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:27,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 10:51:27,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:27,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 10:51:27,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:51:27,021 INFO L87 Difference]: Start difference. First operand 1919 states and 2616 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 19 states have internal predecessors, (76), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-20 10:52:21,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:28,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:28,770 INFO L93 Difference]: Finished difference Result 2735 states and 3823 transitions. [2022-11-20 10:52:28,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 10:52:28,771 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 19 states have internal predecessors, (76), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 66 [2022-11-20 10:52:28,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:28,782 INFO L225 Difference]: With dead ends: 2735 [2022-11-20 10:52:28,782 INFO L226 Difference]: Without dead ends: 2733 [2022-11-20 10:52:28,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 35.7s TimeCoverageRelationStatistics Valid=573, Invalid=2966, Unknown=1, NotChecked=0, Total=3540 [2022-11-20 10:52:28,785 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 324 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 245 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 1858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:28,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 713 Invalid, 1858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 1612 Invalid, 1 Unknown, 0 Unchecked, 25.9s Time] [2022-11-20 10:52:28,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2022-11-20 10:52:29,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2047. [2022-11-20 10:52:29,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2047 states, 1534 states have (on average 1.2972620599739244) internal successors, (1990), 1574 states have internal predecessors, (1990), 401 states have call successors, (401), 111 states have call predecessors, (401), 111 states have return successors, (394), 361 states have call predecessors, (394), 394 states have call successors, (394) [2022-11-20 10:52:29,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 2785 transitions. [2022-11-20 10:52:29,600 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 2785 transitions. Word has length 66 [2022-11-20 10:52:29,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:29,601 INFO L495 AbstractCegarLoop]: Abstraction has 2047 states and 2785 transitions. [2022-11-20 10:52:29,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 19 states have internal predecessors, (76), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-20 10:52:29,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 2785 transitions. [2022-11-20 10:52:29,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-20 10:52:29,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:29,602 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:29,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:29,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:29,806 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:52:29,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:29,807 INFO L85 PathProgramCache]: Analyzing trace with hash 834529569, now seen corresponding path program 2 times [2022-11-20 10:52:29,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:52:29,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068645981] [2022-11-20 10:52:29,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:29,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:52:29,820 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:52:29,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072136785] [2022-11-20 10:52:29,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:52:29,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:29,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:52:29,823 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:52:29,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 10:52:29,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:52:29,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:29,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 10:52:29,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 10:52:29,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:52:29,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:52:29,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068645981] [2022-11-20 10:52:29,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:52:29,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072136785] [2022-11-20 10:52:29,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072136785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:52:29,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:52:29,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:52:29,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798744858] [2022-11-20 10:52:29,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:52:29,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:52:29,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:52:29,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:52:29,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:52:29,924 INFO L87 Difference]: Start difference. First operand 2047 states and 2785 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-20 10:52:30,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:30,774 INFO L93 Difference]: Finished difference Result 3624 states and 5009 transitions. [2022-11-20 10:52:30,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:52:30,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 69 [2022-11-20 10:52:30,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:30,783 INFO L225 Difference]: With dead ends: 3624 [2022-11-20 10:52:30,784 INFO L226 Difference]: Without dead ends: 2427 [2022-11-20 10:52:30,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:52:30,787 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 13 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:30,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 109 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:52:30,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2022-11-20 10:52:31,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2265. [2022-11-20 10:52:31,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 1658 states have (on average 1.2979493365500603) internal successors, (2152), 1698 states have internal predecessors, (2152), 495 states have call successors, (495), 111 states have call predecessors, (495), 111 states have return successors, (488), 455 states have call predecessors, (488), 488 states have call successors, (488) [2022-11-20 10:52:31,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 3135 transitions. [2022-11-20 10:52:31,494 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 3135 transitions. Word has length 69 [2022-11-20 10:52:31,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:31,494 INFO L495 AbstractCegarLoop]: Abstraction has 2265 states and 3135 transitions. [2022-11-20 10:52:31,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-20 10:52:31,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 3135 transitions. [2022-11-20 10:52:31,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 10:52:31,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:31,496 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:31,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:31,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:31,701 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:52:31,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:31,702 INFO L85 PathProgramCache]: Analyzing trace with hash 211513650, now seen corresponding path program 3 times [2022-11-20 10:52:31,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:52:31,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20122622] [2022-11-20 10:52:31,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:31,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:52:31,712 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:52:31,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611525030] [2022-11-20 10:52:31,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:52:31,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:31,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:52:31,718 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:52:31,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 10:52:31,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 10:52:31,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:31,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 10:52:31,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:32,848 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-20 10:52:32,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:35,364 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-20 10:52:35,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:52:35,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20122622] [2022-11-20 10:52:35,364 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:52:35,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611525030] [2022-11-20 10:52:35,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611525030] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:35,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:52:35,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2022-11-20 10:52:35,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533041611] [2022-11-20 10:52:35,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:35,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 10:52:35,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:52:35,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 10:52:35,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-11-20 10:52:35,367 INFO L87 Difference]: Start difference. First operand 2265 states and 3135 transitions. Second operand has 28 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 25 states have internal predecessors, (77), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-20 10:53:16,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:16,160 INFO L93 Difference]: Finished difference Result 2927 states and 4070 transitions. [2022-11-20 10:53:16,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-20 10:53:16,161 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 25 states have internal predecessors, (77), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 71 [2022-11-20 10:53:16,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:16,171 INFO L225 Difference]: With dead ends: 2927 [2022-11-20 10:53:16,171 INFO L226 Difference]: Without dead ends: 2925 [2022-11-20 10:53:16,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=978, Invalid=3578, Unknown=0, NotChecked=0, Total=4556 [2022-11-20 10:53:16,174 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 518 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 1595 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 2066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 1595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:16,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 1094 Invalid, 2066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 1595 Invalid, 0 Unknown, 0 Unchecked, 16.6s Time] [2022-11-20 10:53:16,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2925 states. [2022-11-20 10:53:17,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2925 to 2594. [2022-11-20 10:53:17,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 1915 states have (on average 1.2971279373368145) internal successors, (2484), 1962 states have internal predecessors, (2484), 540 states have call successors, (540), 138 states have call predecessors, (540), 138 states have return successors, (533), 493 states have call predecessors, (533), 533 states have call successors, (533) [2022-11-20 10:53:17,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 3557 transitions. [2022-11-20 10:53:17,293 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 3557 transitions. Word has length 71 [2022-11-20 10:53:17,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:17,293 INFO L495 AbstractCegarLoop]: Abstraction has 2594 states and 3557 transitions. [2022-11-20 10:53:17,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 25 states have internal predecessors, (77), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-20 10:53:17,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 3557 transitions. [2022-11-20 10:53:17,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-20 10:53:17,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:17,301 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:17,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:17,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:17,506 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:17,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:17,507 INFO L85 PathProgramCache]: Analyzing trace with hash 940337767, now seen corresponding path program 1 times [2022-11-20 10:53:17,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:17,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904082351] [2022-11-20 10:53:17,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:17,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:17,524 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:53:17,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516700897] [2022-11-20 10:53:17,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:17,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:17,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:17,526 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:53:17,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 10:53:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:17,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 10:53:17,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:17,980 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 20 proven. 23 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-11-20 10:53:17,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-11-20 10:53:18,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:18,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904082351] [2022-11-20 10:53:18,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:53:18,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516700897] [2022-11-20 10:53:18,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516700897] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:53:18,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:53:18,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2022-11-20 10:53:18,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349818641] [2022-11-20 10:53:18,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:53:18,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 10:53:18,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:18,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 10:53:18,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-11-20 10:53:18,615 INFO L87 Difference]: Start difference. First operand 2594 states and 3557 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 18 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-11-20 10:53:22,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:22,753 INFO L93 Difference]: Finished difference Result 3911 states and 5653 transitions. [2022-11-20 10:53:22,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 10:53:22,754 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 18 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 85 [2022-11-20 10:53:22,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:22,773 INFO L225 Difference]: With dead ends: 3911 [2022-11-20 10:53:22,773 INFO L226 Difference]: Without dead ends: 3909 [2022-11-20 10:53:22,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=392, Invalid=1414, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 10:53:22,776 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 279 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:22,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 673 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-20 10:53:22,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3909 states. [2022-11-20 10:53:24,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3909 to 3544. [2022-11-20 10:53:24,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3544 states, 2393 states have (on average 1.3418303384872545) internal successors, (3211), 2464 states have internal predecessors, (3211), 996 states have call successors, (996), 154 states have call predecessors, (996), 154 states have return successors, (989), 925 states have call predecessors, (989), 989 states have call successors, (989) [2022-11-20 10:53:24,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3544 states to 3544 states and 5196 transitions. [2022-11-20 10:53:24,739 INFO L78 Accepts]: Start accepts. Automaton has 3544 states and 5196 transitions. Word has length 85 [2022-11-20 10:53:24,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:24,740 INFO L495 AbstractCegarLoop]: Abstraction has 3544 states and 5196 transitions. [2022-11-20 10:53:24,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 18 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-11-20 10:53:24,740 INFO L276 IsEmpty]: Start isEmpty. Operand 3544 states and 5196 transitions. [2022-11-20 10:53:24,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-20 10:53:24,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:24,742 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:24,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:24,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 10:53:24,947 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:24,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:24,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1813624164, now seen corresponding path program 1 times [2022-11-20 10:53:24,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:24,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013570966] [2022-11-20 10:53:24,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:24,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:24,955 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:53:24,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151681559] [2022-11-20 10:53:24,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:24,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:24,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:24,957 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:53:24,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 10:53:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:25,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-20 10:53:25,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-20 10:53:26,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-20 10:53:30,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:30,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013570966] [2022-11-20 10:53:30,902 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:53:30,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151681559] [2022-11-20 10:53:30,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151681559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:53:30,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:53:30,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2022-11-20 10:53:30,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883728622] [2022-11-20 10:53:30,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:53:30,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-20 10:53:30,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:30,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-20 10:53:30,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 10:53:30,905 INFO L87 Difference]: Start difference. First operand 3544 states and 5196 transitions. Second operand has 33 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-20 10:53:42,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:54:13,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:54:29,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:54:49,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:55:07,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:55:19,017 WARN L233 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 110 DAG size of output: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:55:42,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:42,137 INFO L93 Difference]: Finished difference Result 5248 states and 7800 transitions. [2022-11-20 10:55:42,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-20 10:55:42,138 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 84 [2022-11-20 10:55:42,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:42,165 INFO L225 Difference]: With dead ends: 5248 [2022-11-20 10:55:42,165 INFO L226 Difference]: Without dead ends: 5211 [2022-11-20 10:55:42,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5060 ImplicationChecksByTransitivity, 80.2s TimeCoverageRelationStatistics Valid=2693, Invalid=11349, Unknown=0, NotChecked=0, Total=14042 [2022-11-20 10:55:42,173 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 714 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 3203 mSolverCounterSat, 740 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 3945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 740 IncrementalHoareTripleChecker+Valid, 3203 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:42,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 1223 Invalid, 3945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [740 Valid, 3203 Invalid, 2 Unknown, 0 Unchecked, 49.4s Time] [2022-11-20 10:55:42,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5211 states. [2022-11-20 10:55:46,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5211 to 4002. [2022-11-20 10:55:46,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4002 states, 2768 states have (on average 1.3435693641618498) internal successors, (3719), 2841 states have internal predecessors, (3719), 1069 states have call successors, (1069), 164 states have call predecessors, (1069), 164 states have return successors, (1062), 996 states have call predecessors, (1062), 1062 states have call successors, (1062) [2022-11-20 10:55:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4002 states to 4002 states and 5850 transitions. [2022-11-20 10:55:46,031 INFO L78 Accepts]: Start accepts. Automaton has 4002 states and 5850 transitions. Word has length 84 [2022-11-20 10:55:46,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:46,031 INFO L495 AbstractCegarLoop]: Abstraction has 4002 states and 5850 transitions. [2022-11-20 10:55:46,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-20 10:55:46,032 INFO L276 IsEmpty]: Start isEmpty. Operand 4002 states and 5850 transitions. [2022-11-20 10:55:46,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 10:55:46,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:46,033 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:46,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:46,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-20 10:55:46,239 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:55:46,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:46,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1186023176, now seen corresponding path program 1 times [2022-11-20 10:55:46,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:46,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326650909] [2022-11-20 10:55:46,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:46,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:46,248 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:55:46,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869055156] [2022-11-20 10:55:46,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:46,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:46,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:55:46,254 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:55:46,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 10:55:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:46,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-20 10:55:46,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-20 10:55:47,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-11-20 10:55:49,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:49,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326650909] [2022-11-20 10:55:49,915 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:55:49,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869055156] [2022-11-20 10:55:49,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869055156] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:49,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:55:49,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2022-11-20 10:55:49,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024538061] [2022-11-20 10:55:49,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:49,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 10:55:49,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:49,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 10:55:49,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-11-20 10:55:49,917 INFO L87 Difference]: Start difference. First operand 4002 states and 5850 transitions. Second operand has 26 states, 25 states have (on average 2.76) internal successors, (69), 23 states have internal predecessors, (69), 9 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-20 10:56:03,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:56:17,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:56:50,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:57:18,535 WARN L233 SmtUtils]: Spent 8.30s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:57:32,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:57:40,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:40,824 INFO L93 Difference]: Finished difference Result 4966 states and 7324 transitions. [2022-11-20 10:57:40,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-20 10:57:40,825 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.76) internal successors, (69), 23 states have internal predecessors, (69), 9 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) Word has length 87 [2022-11-20 10:57:40,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:40,848 INFO L225 Difference]: With dead ends: 4966 [2022-11-20 10:57:40,848 INFO L226 Difference]: Without dead ends: 4960 [2022-11-20 10:57:40,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2076 ImplicationChecksByTransitivity, 59.3s TimeCoverageRelationStatistics Valid=1488, Invalid=5318, Unknown=0, NotChecked=0, Total=6806 [2022-11-20 10:57:40,852 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 442 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 1908 mSolverCounterSat, 499 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 2410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 499 IncrementalHoareTripleChecker+Valid, 1908 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:40,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 1215 Invalid, 2410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [499 Valid, 1908 Invalid, 3 Unknown, 0 Unchecked, 48.2s Time] [2022-11-20 10:57:40,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4960 states. [2022-11-20 10:57:45,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4960 to 4493. [2022-11-20 10:57:45,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4493 states, 3084 states have (on average 1.3495460440985734) internal successors, (4162), 3162 states have internal predecessors, (4162), 1224 states have call successors, (1224), 185 states have call predecessors, (1224), 184 states have return successors, (1218), 1145 states have call predecessors, (1218), 1218 states have call successors, (1218) [2022-11-20 10:57:45,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4493 states to 4493 states and 6604 transitions. [2022-11-20 10:57:45,245 INFO L78 Accepts]: Start accepts. Automaton has 4493 states and 6604 transitions. Word has length 87 [2022-11-20 10:57:45,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:45,245 INFO L495 AbstractCegarLoop]: Abstraction has 4493 states and 6604 transitions. [2022-11-20 10:57:45,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.76) internal successors, (69), 23 states have internal predecessors, (69), 9 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-20 10:57:45,246 INFO L276 IsEmpty]: Start isEmpty. Operand 4493 states and 6604 transitions. [2022-11-20 10:57:45,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-20 10:57:45,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:45,249 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:45,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-20 10:57:45,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 10:57:45,455 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:57:45,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:45,455 INFO L85 PathProgramCache]: Analyzing trace with hash 348816342, now seen corresponding path program 1 times [2022-11-20 10:57:45,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:57:45,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73206389] [2022-11-20 10:57:45,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:57:45,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:57:45,465 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:57:45,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418835278] [2022-11-20 10:57:45,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:57:45,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:57:45,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:57:45,471 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:57:45,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 10:57:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:45,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 10:57:45,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-20 10:57:45,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:57:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-11-20 10:57:45,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:57:45,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73206389] [2022-11-20 10:57:45,999 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:57:45,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418835278] [2022-11-20 10:57:45,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418835278] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:57:46,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:57:46,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2022-11-20 10:57:46,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162610800] [2022-11-20 10:57:46,000 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:57:46,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 10:57:46,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:57:46,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 10:57:46,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-11-20 10:57:46,001 INFO L87 Difference]: Start difference. First operand 4493 states and 6604 transitions. Second operand has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-20 10:57:58,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:58,345 INFO L93 Difference]: Finished difference Result 11740 states and 18374 transitions. [2022-11-20 10:57:58,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 10:57:58,346 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 94 [2022-11-20 10:57:58,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:58,386 INFO L225 Difference]: With dead ends: 11740 [2022-11-20 10:57:58,386 INFO L226 Difference]: Without dead ends: 10053 [2022-11-20 10:57:58,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 10:57:58,395 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 663 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:58,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 614 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 10:57:58,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10053 states. [2022-11-20 10:58:10,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10053 to 9696. [2022-11-20 10:58:10,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9696 states, 6001 states have (on average 1.375437427095484) internal successors, (8254), 6069 states have internal predecessors, (8254), 3372 states have call successors, (3372), 323 states have call predecessors, (3372), 322 states have return successors, (3360), 3303 states have call predecessors, (3360), 3360 states have call successors, (3360) [2022-11-20 10:58:10,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9696 states to 9696 states and 14986 transitions. [2022-11-20 10:58:10,375 INFO L78 Accepts]: Start accepts. Automaton has 9696 states and 14986 transitions. Word has length 94 [2022-11-20 10:58:10,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:10,375 INFO L495 AbstractCegarLoop]: Abstraction has 9696 states and 14986 transitions. [2022-11-20 10:58:10,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-20 10:58:10,376 INFO L276 IsEmpty]: Start isEmpty. Operand 9696 states and 14986 transitions. [2022-11-20 10:58:10,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-20 10:58:10,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:10,378 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:10,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-20 10:58:10,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 10:58:10,584 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:58:10,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:10,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1461558211, now seen corresponding path program 2 times [2022-11-20 10:58:10,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:58:10,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669152181] [2022-11-20 10:58:10,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:10,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:58:10,596 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:58:10,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716701111] [2022-11-20 10:58:10,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:58:10,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:58:10,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:58:10,598 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:58:10,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-20 10:58:10,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:58:10,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:58:10,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 10:58:10,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:10,802 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-20 10:58:10,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:10,935 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-20 10:58:10,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:58:10,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669152181] [2022-11-20 10:58:10,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:58:10,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716701111] [2022-11-20 10:58:10,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716701111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:10,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:58:10,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2022-11-20 10:58:10,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138810845] [2022-11-20 10:58:10,936 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:10,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:58:10,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:58:10,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:58:10,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:58:10,937 INFO L87 Difference]: Start difference. First operand 9696 states and 14986 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-20 10:58:28,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:28,069 INFO L93 Difference]: Finished difference Result 13475 states and 20889 transitions. [2022-11-20 10:58:28,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 10:58:28,070 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 95 [2022-11-20 10:58:28,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:28,123 INFO L225 Difference]: With dead ends: 13475 [2022-11-20 10:58:28,124 INFO L226 Difference]: Without dead ends: 12893 [2022-11-20 10:58:28,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 188 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=347, Invalid=1293, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 10:58:28,131 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 246 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:28,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 516 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 10:58:28,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12893 states. [2022-11-20 10:58:39,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12893 to 9800. [2022-11-20 10:58:40,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9800 states, 6111 states have (on average 1.3735886107020128) internal successors, (8394), 6181 states have internal predecessors, (8394), 3366 states have call successors, (3366), 323 states have call predecessors, (3366), 322 states have return successors, (3354), 3295 states have call predecessors, (3354), 3354 states have call successors, (3354) [2022-11-20 10:58:40,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9800 states to 9800 states and 15114 transitions. [2022-11-20 10:58:40,051 INFO L78 Accepts]: Start accepts. Automaton has 9800 states and 15114 transitions. Word has length 95 [2022-11-20 10:58:40,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:40,051 INFO L495 AbstractCegarLoop]: Abstraction has 9800 states and 15114 transitions. [2022-11-20 10:58:40,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-20 10:58:40,052 INFO L276 IsEmpty]: Start isEmpty. Operand 9800 states and 15114 transitions. [2022-11-20 10:58:40,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-20 10:58:40,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:40,055 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:40,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-20 10:58:40,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:58:40,261 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:58:40,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:40,261 INFO L85 PathProgramCache]: Analyzing trace with hash -737280076, now seen corresponding path program 2 times [2022-11-20 10:58:40,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:58:40,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693754946] [2022-11-20 10:58:40,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:40,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:58:40,278 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:58:40,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [669976657] [2022-11-20 10:58:40,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:58:40,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:58:40,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:58:40,282 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:58:40,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-20 10:58:40,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:58:40,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:58:40,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-20 10:58:40,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:42,068 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 29 proven. 65 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-11-20 10:58:42,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 26 proven. 65 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-11-20 10:58:54,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:58:54,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693754946] [2022-11-20 10:58:54,265 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:58:54,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669976657] [2022-11-20 10:58:54,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669976657] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:54,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:58:54,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2022-11-20 10:58:54,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689921927] [2022-11-20 10:58:54,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:54,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 10:58:54,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:58:54,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 10:58:54,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2022-11-20 10:58:54,268 INFO L87 Difference]: Start difference. First operand 9800 states and 15114 transitions. Second operand has 32 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 10 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2022-11-20 10:59:12,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:59:26,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:59:32,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:59:56,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 11:00:21,118 WARN L233 SmtUtils]: Spent 5.11s on a formula simplification. DAG size of input: 84 DAG size of output: 81 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:00:40,351 WARN L233 SmtUtils]: Spent 5.25s on a formula simplification. DAG size of input: 83 DAG size of output: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:01:10,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:01:10,848 INFO L93 Difference]: Finished difference Result 15147 states and 23116 transitions. [2022-11-20 11:01:10,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-20 11:01:10,848 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 10 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) Word has length 104 [2022-11-20 11:01:10,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:01:10,896 INFO L225 Difference]: With dead ends: 15147 [2022-11-20 11:01:10,896 INFO L226 Difference]: Without dead ends: 11565 [2022-11-20 11:01:10,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2951 ImplicationChecksByTransitivity, 83.4s TimeCoverageRelationStatistics Valid=1828, Invalid=8272, Unknown=0, NotChecked=0, Total=10100 [2022-11-20 11:01:10,913 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 488 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 2286 mSolverCounterSat, 678 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 2966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 678 IncrementalHoareTripleChecker+Valid, 2286 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:01:10,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 998 Invalid, 2966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [678 Valid, 2286 Invalid, 2 Unknown, 0 Unchecked, 45.8s Time] [2022-11-20 11:01:10,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11565 states. [2022-11-20 11:01:24,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11565 to 10476. [2022-11-20 11:01:24,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10476 states, 6558 states have (on average 1.373437023482769) internal successors, (9007), 6623 states have internal predecessors, (9007), 3587 states have call successors, (3587), 330 states have call predecessors, (3587), 330 states have return successors, (3576), 3522 states have call predecessors, (3576), 3576 states have call successors, (3576) [2022-11-20 11:01:24,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10476 states to 10476 states and 16170 transitions. [2022-11-20 11:01:24,444 INFO L78 Accepts]: Start accepts. Automaton has 10476 states and 16170 transitions. Word has length 104 [2022-11-20 11:01:24,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:01:24,445 INFO L495 AbstractCegarLoop]: Abstraction has 10476 states and 16170 transitions. [2022-11-20 11:01:24,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 10 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2022-11-20 11:01:24,445 INFO L276 IsEmpty]: Start isEmpty. Operand 10476 states and 16170 transitions. [2022-11-20 11:01:24,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-20 11:01:24,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:01:24,449 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:01:24,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-20 11:01:24,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 11:01:24,655 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:01:24,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:24,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1018938325, now seen corresponding path program 1 times [2022-11-20 11:01:24,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:24,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616527705] [2022-11-20 11:01:24,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:24,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:24,666 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 11:01:24,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402458511] [2022-11-20 11:01:24,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:24,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:24,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:01:24,668 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:01:24,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-20 11:01:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:24,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:01:24,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:01:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 67 proven. 116 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 11:01:25,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:01:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 67 proven. 52 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-20 11:01:25,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:01:25,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616527705] [2022-11-20 11:01:25,359 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 11:01:25,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402458511] [2022-11-20 11:01:25,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402458511] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:01:25,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:01:25,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-11-20 11:01:25,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708667661] [2022-11-20 11:01:25,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:01:25,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 11:01:25,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:01:25,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 11:01:25,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-11-20 11:01:25,361 INFO L87 Difference]: Start difference. First operand 10476 states and 16170 transitions. Second operand has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-20 11:01:42,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:01:42,159 INFO L93 Difference]: Finished difference Result 18621 states and 28957 transitions. [2022-11-20 11:01:42,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-20 11:01:42,159 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 106 [2022-11-20 11:01:42,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:01:42,210 INFO L225 Difference]: With dead ends: 18621 [2022-11-20 11:01:42,210 INFO L226 Difference]: Without dead ends: 11869 [2022-11-20 11:01:42,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=708, Invalid=1272, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 11:01:42,233 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 734 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:01:42,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 726 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:01:42,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11869 states. [2022-11-20 11:01:57,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11869 to 11677. [2022-11-20 11:01:57,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11677 states, 7169 states have (on average 1.267122332263914) internal successors, (9084), 7199 states have internal predecessors, (9084), 4133 states have call successors, (4133), 374 states have call predecessors, (4133), 374 states have return successors, (4120), 4103 states have call predecessors, (4120), 4120 states have call successors, (4120) [2022-11-20 11:01:57,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11677 states to 11677 states and 17337 transitions. [2022-11-20 11:01:57,886 INFO L78 Accepts]: Start accepts. Automaton has 11677 states and 17337 transitions. Word has length 106 [2022-11-20 11:01:57,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:01:57,887 INFO L495 AbstractCegarLoop]: Abstraction has 11677 states and 17337 transitions. [2022-11-20 11:01:57,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-20 11:01:57,887 INFO L276 IsEmpty]: Start isEmpty. Operand 11677 states and 17337 transitions. [2022-11-20 11:01:57,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-20 11:01:57,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:01:57,891 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:01:57,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-20 11:01:58,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 11:01:58,097 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:01:58,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:58,098 INFO L85 PathProgramCache]: Analyzing trace with hash -792698158, now seen corresponding path program 2 times [2022-11-20 11:01:58,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:58,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157852114] [2022-11-20 11:01:58,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:58,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:58,117 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 11:01:58,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202544186] [2022-11-20 11:01:58,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:01:58,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:58,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:01:58,121 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:01:58,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef4970b-4155-4cc8-aac8-60dafc8ccf28/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-20 11:01:58,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:01:58,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:01:58,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-20 11:01:58,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:01:59,865 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 29 proven. 61 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2022-11-20 11:01:59,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:02:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 26 proven. 61 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-11-20 11:02:06,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:02:06,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157852114] [2022-11-20 11:02:06,700 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 11:02:06,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202544186] [2022-11-20 11:02:06,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202544186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:02:06,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:02:06,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2022-11-20 11:02:06,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598779324] [2022-11-20 11:02:06,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:02:06,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 11:02:06,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:02:06,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 11:02:06,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-11-20 11:02:06,703 INFO L87 Difference]: Start difference. First operand 11677 states and 17337 transitions. Second operand has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 28 states have internal predecessors, (88), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2022-11-20 11:02:53,626 WARN L233 SmtUtils]: Spent 16.33s on a formula simplification. DAG size of input: 100 DAG size of output: 86 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:03:07,456 WARN L233 SmtUtils]: Spent 6.56s on a formula simplification. DAG size of input: 96 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:03:53,713 WARN L233 SmtUtils]: Spent 7.15s on a formula simplification. DAG size of input: 108 DAG size of output: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:03:56,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 11:04:17,017 WARN L233 SmtUtils]: Spent 16.33s on a formula simplification. DAG size of input: 109 DAG size of output: 89 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:04:23,689 WARN L233 SmtUtils]: Spent 5.39s on a formula simplification. DAG size of input: 97 DAG size of output: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:04:35,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 11:04:55,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []