./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a --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 c55d57654781cf0634666e1c7d4e43dff0d9410f4306aded3e4e446e1f9e88d1 --- 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-b5237d8 [2022-11-21 16:52:14,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:52:14,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:52:14,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:52:14,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:52:14,125 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:52:14,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:52:14,128 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:52:14,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:52:14,133 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:52:14,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:52:14,140 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:52:14,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:52:14,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:52:14,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:52:14,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:52:14,153 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:52:14,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:52:14,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:52:14,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:52:14,159 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:52:14,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:52:14,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:52:14,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:52:14,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:52:14,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:52:14,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:52:14,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:52:14,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:52:14,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:52:14,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:52:14,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:52:14,169 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:52:14,170 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:52:14,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:52:14,171 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:52:14,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:52:14,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:52:14,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:52:14,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:52:14,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:52:14,179 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:52:14,210 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:52:14,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:52:14,211 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:52:14,211 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:52:14,212 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:52:14,213 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:52:14,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:52:14,213 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:52:14,214 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:52:14,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:52:14,215 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:52:14,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:52:14,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:52:14,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:52:14,216 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:52:14,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:52:14,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:52:14,216 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:52:14,217 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:52:14,217 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:52:14,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:52:14,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:52:14,217 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:52:14,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:52:14,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:52:14,218 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:52:14,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:52:14,219 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:52:14,219 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:52:14,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:52:14,219 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:52:14,220 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:52:14,220 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:52:14,220 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_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c55d57654781cf0634666e1c7d4e43dff0d9410f4306aded3e4e446e1f9e88d1 [2022-11-21 16:52:14,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:52:14,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:52:14,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:52:14,531 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:52:14,532 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:52:14,546 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c [2022-11-21 16:52:17,463 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:52:17,730 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:52:17,731 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c [2022-11-21 16:52:17,738 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/data/2789e3f66/beab9c113695471e8e405e9f6b270945/FLAG160f4d3fd [2022-11-21 16:52:17,758 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/data/2789e3f66/beab9c113695471e8e405e9f6b270945 [2022-11-21 16:52:17,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:52:17,766 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:52:17,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:52:17,770 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:52:17,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:52:17,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:52:17" (1/1) ... [2022-11-21 16:52:17,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@192baacb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:17, skipping insertion in model container [2022-11-21 16:52:17,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:52:17" (1/1) ... [2022-11-21 16:52:17,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:52:17,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:52:17,978 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_0ed8fe95-8d91-450c-b28a-474703b27e6d/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c[588,601] [2022-11-21 16:52:18,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:52:18,022 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:52:18,031 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_0ed8fe95-8d91-450c-b28a-474703b27e6d/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c[588,601] [2022-11-21 16:52:18,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:52:18,056 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:52:18,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:18 WrapperNode [2022-11-21 16:52:18,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:52:18,057 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:52:18,057 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:52:18,057 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:52:18,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:18" (1/1) ... [2022-11-21 16:52:18,070 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:18" (1/1) ... [2022-11-21 16:52:18,089 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2022-11-21 16:52:18,089 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:52:18,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:52:18,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:52:18,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:52:18,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:18" (1/1) ... [2022-11-21 16:52:18,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:18" (1/1) ... [2022-11-21 16:52:18,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:18" (1/1) ... [2022-11-21 16:52:18,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:18" (1/1) ... [2022-11-21 16:52:18,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:18" (1/1) ... [2022-11-21 16:52:18,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:18" (1/1) ... [2022-11-21 16:52:18,109 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:18" (1/1) ... [2022-11-21 16:52:18,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:18" (1/1) ... [2022-11-21 16:52:18,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:52:18,112 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:52:18,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:52:18,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:52:18,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:18" (1/1) ... [2022-11-21 16:52:18,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:52:18,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:52:18,148 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:52:18,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:52:18,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:52:18,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:52:18,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:52:18,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:52:18,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-21 16:52:18,198 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-21 16:52:18,276 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:52:18,278 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:52:18,440 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:52:18,446 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:52:18,447 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-21 16:52:18,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:52:18 BoogieIcfgContainer [2022-11-21 16:52:18,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:52:18,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:52:18,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:52:18,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:52:18,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:52:17" (1/3) ... [2022-11-21 16:52:18,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4584ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:52:18, skipping insertion in model container [2022-11-21 16:52:18,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:18" (2/3) ... [2022-11-21 16:52:18,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4584ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:52:18, skipping insertion in model container [2022-11-21 16:52:18,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:52:18" (3/3) ... [2022-11-21 16:52:18,459 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound100.c [2022-11-21 16:52:18,479 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:52:18,479 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:52:18,558 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:52:18,569 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;@78fc127b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:52:18,570 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 16:52:18,577 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-21 16:52:18,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-21 16:52:18,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:18,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:52:18,588 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:52:18,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:18,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1823967074, now seen corresponding path program 1 times [2022-11-21 16:52:18,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:18,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462387867] [2022-11-21 16:52:18,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:18,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:52:18,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:18,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462387867] [2022-11-21 16:52:18,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462387867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:52:18,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:52:18,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:52:18,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348261545] [2022-11-21 16:52:18,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:52:18,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:52:18,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:18,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:52:18,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:52:18,847 INFO L87 Difference]: Start difference. First operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:18,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:18,872 INFO L93 Difference]: Finished difference Result 50 states and 87 transitions. [2022-11-21 16:52:18,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:52:18,874 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-21 16:52:18,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:18,882 INFO L225 Difference]: With dead ends: 50 [2022-11-21 16:52:18,882 INFO L226 Difference]: Without dead ends: 22 [2022-11-21 16:52:18,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:52:18,889 INFO L413 NwaCegarLoop]: 37 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, 37 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 [2022-11-21 16:52:18,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:52:18,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-21 16:52:18,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-21 16:52:18,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-21 16:52:18,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2022-11-21 16:52:18,930 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 7 [2022-11-21 16:52:18,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:18,931 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2022-11-21 16:52:18,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:18,931 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2022-11-21 16:52:18,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-21 16:52:18,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:18,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:52:18,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:52:18,933 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:52:18,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:18,934 INFO L85 PathProgramCache]: Analyzing trace with hash 178926099, now seen corresponding path program 1 times [2022-11-21 16:52:18,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:18,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297194815] [2022-11-21 16:52:18,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:18,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:52:19,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:19,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297194815] [2022-11-21 16:52:19,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297194815] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:52:19,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:52:19,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:52:19,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246977626] [2022-11-21 16:52:19,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:52:19,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:52:19,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:19,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:52:19,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:52:19,114 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:19,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:19,167 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions. [2022-11-21 16:52:19,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:52:19,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-21 16:52:19,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:19,168 INFO L225 Difference]: With dead ends: 36 [2022-11-21 16:52:19,169 INFO L226 Difference]: Without dead ends: 24 [2022-11-21 16:52:19,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:52:19,170 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:19,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:52:19,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-21 16:52:19,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-21 16:52:19,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-21 16:52:19,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 35 transitions. [2022-11-21 16:52:19,179 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 35 transitions. Word has length 8 [2022-11-21 16:52:19,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:19,179 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 35 transitions. [2022-11-21 16:52:19,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:19,180 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 35 transitions. [2022-11-21 16:52:19,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-21 16:52:19,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:19,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:52:19,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:52:19,181 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:52:19,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:19,182 INFO L85 PathProgramCache]: Analyzing trace with hash 180475231, now seen corresponding path program 1 times [2022-11-21 16:52:19,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:19,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004775010] [2022-11-21 16:52:19,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:19,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:19,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:52:19,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:19,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004775010] [2022-11-21 16:52:19,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004775010] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:52:19,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:52:19,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:52:19,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256161866] [2022-11-21 16:52:19,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:52:19,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:52:19,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:19,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:52:19,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:52:19,425 INFO L87 Difference]: Start difference. First operand 24 states and 35 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:19,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:19,569 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2022-11-21 16:52:19,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:52:19,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-21 16:52:19,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:19,572 INFO L225 Difference]: With dead ends: 30 [2022-11-21 16:52:19,572 INFO L226 Difference]: Without dead ends: 28 [2022-11-21 16:52:19,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:52:19,575 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:19,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 62 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:52:19,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-21 16:52:19,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-21 16:52:19,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-21 16:52:19,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2022-11-21 16:52:19,600 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 8 [2022-11-21 16:52:19,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:19,601 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2022-11-21 16:52:19,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:19,601 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2022-11-21 16:52:19,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 16:52:19,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:19,602 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:52:19,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:52:19,603 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:52:19,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:19,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1275442234, now seen corresponding path program 1 times [2022-11-21 16:52:19,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:19,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251281512] [2022-11-21 16:52:19,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:19,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:19,619 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:52:19,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058779275] [2022-11-21 16:52:19,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:19,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:19,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:52:19,624 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:52:19,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:52:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:19,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-21 16:52:19,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:52:19,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:52:19,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:52:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:52:20,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:20,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251281512] [2022-11-21 16:52:20,210 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:52:20,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058779275] [2022-11-21 16:52:20,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058779275] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:52:20,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:52:20,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-11-21 16:52:20,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654279767] [2022-11-21 16:52:20,216 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:52:20,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 16:52:20,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:20,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 16:52:20,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:52:20,219 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 16:52:20,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:20,801 INFO L93 Difference]: Finished difference Result 54 states and 76 transitions. [2022-11-21 16:52:20,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:52:20,803 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2022-11-21 16:52:20,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:20,805 INFO L225 Difference]: With dead ends: 54 [2022-11-21 16:52:20,805 INFO L226 Difference]: Without dead ends: 52 [2022-11-21 16:52:20,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:52:20,807 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 24 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:20,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 71 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 16:52:20,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-21 16:52:20,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2022-11-21 16:52:20,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 21 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-21 16:52:20,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 66 transitions. [2022-11-21 16:52:20,844 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 66 transitions. Word has length 13 [2022-11-21 16:52:20,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:20,845 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 66 transitions. [2022-11-21 16:52:20,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 16:52:20,846 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 66 transitions. [2022-11-21 16:52:20,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 16:52:20,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:20,848 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:52:20,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:52:21,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:21,054 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:52:21,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:21,055 INFO L85 PathProgramCache]: Analyzing trace with hash 427545983, now seen corresponding path program 1 times [2022-11-21 16:52:21,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:21,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693393861] [2022-11-21 16:52:21,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:21,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:21,070 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:52:21,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865131252] [2022-11-21 16:52:21,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:21,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:21,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:52:21,073 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:52:21,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:52:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:21,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-21 16:52:21,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:52:21,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:52:21,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:52:21,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:52:21,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:21,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693393861] [2022-11-21 16:52:21,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:52:21,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865131252] [2022-11-21 16:52:21,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865131252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:52:21,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:52:21,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-11-21 16:52:21,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255698109] [2022-11-21 16:52:21,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:52:21,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 16:52:21,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:21,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 16:52:21,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:52:21,389 INFO L87 Difference]: Start difference. First operand 47 states and 66 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 16:52:21,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:21,817 INFO L93 Difference]: Finished difference Result 60 states and 83 transitions. [2022-11-21 16:52:21,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:52:21,818 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 18 [2022-11-21 16:52:21,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:21,819 INFO L225 Difference]: With dead ends: 60 [2022-11-21 16:52:21,819 INFO L226 Difference]: Without dead ends: 58 [2022-11-21 16:52:21,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:52:21,820 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:21,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 61 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 16:52:21,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-21 16:52:21,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2022-11-21 16:52:21,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-21 16:52:21,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2022-11-21 16:52:21,853 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 18 [2022-11-21 16:52:21,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:21,853 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2022-11-21 16:52:21,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 16:52:21,854 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2022-11-21 16:52:21,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 16:52:21,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:21,854 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:52:21,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:52:22,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:22,060 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:52:22,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:22,061 INFO L85 PathProgramCache]: Analyzing trace with hash 5607206, now seen corresponding path program 1 times [2022-11-21 16:52:22,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:22,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371211834] [2022-11-21 16:52:22,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:22,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:22,073 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:52:22,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935583294] [2022-11-21 16:52:22,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:22,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:22,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:52:22,074 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:52:22,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:52:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:22,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-21 16:52:22,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:52:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:52:22,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:52:22,729 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:52:22,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:22,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371211834] [2022-11-21 16:52:22,729 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:52:22,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935583294] [2022-11-21 16:52:22,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935583294] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:52:22,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:52:22,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-11-21 16:52:22,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617366066] [2022-11-21 16:52:22,730 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:52:22,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 16:52:22,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:22,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 16:52:22,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:52:22,731 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-21 16:52:25,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:25,233 INFO L93 Difference]: Finished difference Result 74 states and 100 transitions. [2022-11-21 16:52:25,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:52:25,233 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) Word has length 23 [2022-11-21 16:52:25,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:25,234 INFO L225 Difference]: With dead ends: 74 [2022-11-21 16:52:25,234 INFO L226 Difference]: Without dead ends: 65 [2022-11-21 16:52:25,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:52:25,236 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:25,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 60 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-21 16:52:25,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-21 16:52:25,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-21 16:52:25,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-21 16:52:25,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2022-11-21 16:52:25,262 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 23 [2022-11-21 16:52:25,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:25,263 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2022-11-21 16:52:25,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-21 16:52:25,263 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2022-11-21 16:52:25,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-21 16:52:25,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:25,265 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:52:25,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-21 16:52:25,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:25,471 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:52:25,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:25,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1172224904, now seen corresponding path program 1 times [2022-11-21 16:52:25,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:25,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092297421] [2022-11-21 16:52:25,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:25,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:25,492 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:52:25,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678996310] [2022-11-21 16:52:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:25,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:25,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:52:25,499 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:52:25,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:52:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:25,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:52:25,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:52:25,614 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-21 16:52:25,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:52:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-21 16:52:25,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:25,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092297421] [2022-11-21 16:52:25,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:52:25,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678996310] [2022-11-21 16:52:25,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678996310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:52:25,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:52:25,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-21 16:52:25,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127998203] [2022-11-21 16:52:25,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:52:25,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:52:25,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:25,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:52:25,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:52:25,692 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-21 16:52:25,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:25,876 INFO L93 Difference]: Finished difference Result 140 states and 177 transitions. [2022-11-21 16:52:25,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:52:25,878 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 41 [2022-11-21 16:52:25,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:25,881 INFO L225 Difference]: With dead ends: 140 [2022-11-21 16:52:25,881 INFO L226 Difference]: Without dead ends: 119 [2022-11-21 16:52:25,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:52:25,887 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 62 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:25,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 165 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:52:25,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-21 16:52:25,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2022-11-21 16:52:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 59 states have (on average 1.11864406779661) internal successors, (66), 63 states have internal predecessors, (66), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-21 16:52:25,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 144 transitions. [2022-11-21 16:52:25,947 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 144 transitions. Word has length 41 [2022-11-21 16:52:25,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:25,948 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 144 transitions. [2022-11-21 16:52:25,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-21 16:52:25,948 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 144 transitions. [2022-11-21 16:52:25,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-21 16:52:25,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:25,952 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:52:25,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 16:52:26,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:26,158 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:52:26,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:26,159 INFO L85 PathProgramCache]: Analyzing trace with hash -399462631, now seen corresponding path program 1 times [2022-11-21 16:52:26,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:26,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397092270] [2022-11-21 16:52:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:26,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:26,170 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:52:26,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2056122878] [2022-11-21 16:52:26,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:26,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:26,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:52:26,184 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:52:26,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:52:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:26,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-21 16:52:26,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:52:26,395 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-21 16:52:26,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:52:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-21 16:52:26,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:26,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397092270] [2022-11-21 16:52:26,571 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:52:26,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056122878] [2022-11-21 16:52:26,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056122878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:52:26,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:52:26,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2022-11-21 16:52:26,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196515986] [2022-11-21 16:52:26,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:52:26,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 16:52:26,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:26,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 16:52:26,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:52:26,573 INFO L87 Difference]: Start difference. First operand 115 states and 144 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2022-11-21 16:52:28,980 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 [] [2022-11-21 16:52:29,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:29,542 INFO L93 Difference]: Finished difference Result 129 states and 157 transitions. [2022-11-21 16:52:29,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 16:52:29,544 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) Word has length 46 [2022-11-21 16:52:29,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:29,545 INFO L225 Difference]: With dead ends: 129 [2022-11-21 16:52:29,545 INFO L226 Difference]: Without dead ends: 127 [2022-11-21 16:52:29,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-11-21 16:52:29,547 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 23 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:29,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 98 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 480 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-11-21 16:52:29,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-21 16:52:29,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-11-21 16:52:29,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 72 states have internal predecessors, (75), 41 states have call successors, (41), 17 states have call predecessors, (41), 17 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-21 16:52:29,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 153 transitions. [2022-11-21 16:52:29,594 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 153 transitions. Word has length 46 [2022-11-21 16:52:29,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:29,595 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 153 transitions. [2022-11-21 16:52:29,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2022-11-21 16:52:29,595 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 153 transitions. [2022-11-21 16:52:29,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-21 16:52:29,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:29,596 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-21 16:52:29,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 16:52:29,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:29,802 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:52:29,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:29,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1316290887, now seen corresponding path program 2 times [2022-11-21 16:52:29,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:29,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721993242] [2022-11-21 16:52:29,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:29,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:29,812 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:52:29,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616628376] [2022-11-21 16:52:29,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:52:29,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:29,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:52:29,822 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:52:29,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 16:52:29,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:52:29,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:52:29,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-21 16:52:29,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:52:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-21 16:52:30,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:52:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-21 16:52:30,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:30,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721993242] [2022-11-21 16:52:30,211 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:52:30,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616628376] [2022-11-21 16:52:30,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616628376] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:52:30,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:52:30,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-11-21 16:52:30,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778666042] [2022-11-21 16:52:30,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:52:30,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 16:52:30,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:30,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 16:52:30,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:52:30,214 INFO L87 Difference]: Start difference. First operand 127 states and 153 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-21 16:52:31,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:31,325 INFO L93 Difference]: Finished difference Result 141 states and 166 transitions. [2022-11-21 16:52:31,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:52:31,325 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 56 [2022-11-21 16:52:31,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:31,327 INFO L225 Difference]: With dead ends: 141 [2022-11-21 16:52:31,327 INFO L226 Difference]: Without dead ends: 135 [2022-11-21 16:52:31,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:52:31,328 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:31,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 94 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-21 16:52:31,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-21 16:52:31,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-11-21 16:52:31,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 77 states have (on average 1.0909090909090908) internal successors, (84), 81 states have internal predecessors, (84), 37 states have call successors, (37), 20 states have call predecessors, (37), 20 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-21 16:52:31,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 154 transitions. [2022-11-21 16:52:31,368 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 154 transitions. Word has length 56 [2022-11-21 16:52:31,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:31,369 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 154 transitions. [2022-11-21 16:52:31,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-21 16:52:31,369 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 154 transitions. [2022-11-21 16:52:31,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-21 16:52:31,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:31,370 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:52:31,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 16:52:31,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-21 16:52:31,576 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:52:31,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:31,577 INFO L85 PathProgramCache]: Analyzing trace with hash 616227619, now seen corresponding path program 1 times [2022-11-21 16:52:31,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:31,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287711497] [2022-11-21 16:52:31,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:31,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:31,586 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:52:31,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202257909] [2022-11-21 16:52:31,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:31,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:31,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:52:31,588 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:52:31,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 16:52:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:31,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-21 16:52:31,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:52:31,895 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-21 16:52:31,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:52:32,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:32,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287711497] [2022-11-21 16:52:32,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:52:32,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202257909] [2022-11-21 16:52:32,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202257909] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:52:32,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:52:32,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-11-21 16:52:32,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645807056] [2022-11-21 16:52:32,167 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-21 16:52:32,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 16:52:32,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:32,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 16:52:32,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-21 16:52:32,168 INFO L87 Difference]: Start difference. First operand 135 states and 154 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-21 16:52:32,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:32,599 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2022-11-21 16:52:32,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:52:32,599 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 67 [2022-11-21 16:52:32,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:32,600 INFO L225 Difference]: With dead ends: 141 [2022-11-21 16:52:32,601 INFO L226 Difference]: Without dead ends: 137 [2022-11-21 16:52:32,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:52:32,601 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 12 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:32,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 81 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:52:32,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-21 16:52:32,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-11-21 16:52:32,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 82 states have internal predecessors, (85), 37 states have call successors, (37), 21 states have call predecessors, (37), 20 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-21 16:52:32,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 155 transitions. [2022-11-21 16:52:32,635 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 155 transitions. Word has length 67 [2022-11-21 16:52:32,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:32,636 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 155 transitions. [2022-11-21 16:52:32,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-21 16:52:32,636 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 155 transitions. [2022-11-21 16:52:32,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-21 16:52:32,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:32,637 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:52:32,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 16:52:32,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 16:52:32,843 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:52:32,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:32,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1808123650, now seen corresponding path program 1 times [2022-11-21 16:52:32,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:32,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215234343] [2022-11-21 16:52:32,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:32,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:32,852 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:52:32,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423740572] [2022-11-21 16:52:32,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:32,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:32,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:52:32,854 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:52:32,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 16:52:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:32,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 16:52:32,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:52:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-21 16:52:33,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:52:33,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:33,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215234343] [2022-11-21 16:52:33,438 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:52:33,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423740572] [2022-11-21 16:52:33,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423740572] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:52:33,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:52:33,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-11-21 16:52:33,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600769435] [2022-11-21 16:52:33,440 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-21 16:52:33,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 16:52:33,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:33,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 16:52:33,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-21 16:52:33,442 INFO L87 Difference]: Start difference. First operand 137 states and 155 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-21 16:52:33,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:33,835 INFO L93 Difference]: Finished difference Result 139 states and 156 transitions. [2022-11-21 16:52:33,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:52:33,836 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 72 [2022-11-21 16:52:33,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:33,837 INFO L225 Difference]: With dead ends: 139 [2022-11-21 16:52:33,837 INFO L226 Difference]: Without dead ends: 128 [2022-11-21 16:52:33,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:52:33,838 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:33,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 73 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:52:33,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-21 16:52:33,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-11-21 16:52:33,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 77 states have internal predecessors, (79), 34 states have call successors, (34), 19 states have call predecessors, (34), 19 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-21 16:52:33,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 144 transitions. [2022-11-21 16:52:33,907 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 144 transitions. Word has length 72 [2022-11-21 16:52:33,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:33,908 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 144 transitions. [2022-11-21 16:52:33,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-21 16:52:33,908 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 144 transitions. [2022-11-21 16:52:33,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-21 16:52:33,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:33,910 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-21 16:52:33,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 16:52:34,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:34,119 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:52:34,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:34,120 INFO L85 PathProgramCache]: Analyzing trace with hash 514910066, now seen corresponding path program 3 times [2022-11-21 16:52:34,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:34,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841230982] [2022-11-21 16:52:34,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:34,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:34,128 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:52:34,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12028430] [2022-11-21 16:52:34,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:52:34,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:34,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:52:34,130 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:52:34,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 16:52:34,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-21 16:52:34,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:52:34,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-21 16:52:34,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:52:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-21 16:52:34,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:52:35,882 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-21 16:52:35,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:35,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841230982] [2022-11-21 16:52:35,883 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:52:35,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12028430] [2022-11-21 16:52:35,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12028430] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:52:35,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:52:35,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-11-21 16:52:35,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829361272] [2022-11-21 16:52:35,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:52:35,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 16:52:35,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:35,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 16:52:35,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:52:35,886 INFO L87 Difference]: Start difference. First operand 128 states and 144 transitions. Second operand has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-21 16:52:40,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:40,390 INFO L93 Difference]: Finished difference Result 139 states and 155 transitions. [2022-11-21 16:52:40,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 16:52:40,391 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) Word has length 79 [2022-11-21 16:52:40,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:40,392 INFO L225 Difference]: With dead ends: 139 [2022-11-21 16:52:40,392 INFO L226 Difference]: Without dead ends: 134 [2022-11-21 16:52:40,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-11-21 16:52:40,393 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:40,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 124 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-21 16:52:40,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-21 16:52:40,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 129. [2022-11-21 16:52:40,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 80 states have (on average 1.0625) internal successors, (85), 82 states have internal predecessors, (85), 27 states have call successors, (27), 21 states have call predecessors, (27), 21 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-21 16:52:40,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 137 transitions. [2022-11-21 16:52:40,423 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 137 transitions. Word has length 79 [2022-11-21 16:52:40,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:40,424 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 137 transitions. [2022-11-21 16:52:40,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-21 16:52:40,424 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 137 transitions. [2022-11-21 16:52:40,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-21 16:52:40,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:40,426 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:52:40,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 16:52:40,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:40,632 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:52:40,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:40,632 INFO L85 PathProgramCache]: Analyzing trace with hash 308615369, now seen corresponding path program 2 times [2022-11-21 16:52:40,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:40,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381659405] [2022-11-21 16:52:40,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:40,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:40,641 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:52:40,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966823290] [2022-11-21 16:52:40,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:52:40,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:40,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:52:40,643 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:52:40,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 16:52:40,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:52:40,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:52:40,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-21 16:52:40,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:52:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 76 proven. 25 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2022-11-21 16:52:41,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:52:44,114 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 92 proven. 1 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2022-11-21 16:52:44,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:44,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381659405] [2022-11-21 16:52:44,115 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:52:44,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966823290] [2022-11-21 16:52:44,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966823290] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:52:44,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:52:44,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2022-11-21 16:52:44,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388207757] [2022-11-21 16:52:44,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:52:44,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 16:52:44,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:44,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 16:52:44,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:52:44,117 INFO L87 Difference]: Start difference. First operand 129 states and 137 transitions. Second operand has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 7 states have call predecessors, (27), 7 states have call successors, (27) [2022-11-21 16:52:46,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:46,450 INFO L93 Difference]: Finished difference Result 141 states and 150 transitions. [2022-11-21 16:52:46,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:52:46,451 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 7 states have call predecessors, (27), 7 states have call successors, (27) Word has length 95 [2022-11-21 16:52:46,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:46,452 INFO L225 Difference]: With dead ends: 141 [2022-11-21 16:52:46,452 INFO L226 Difference]: Without dead ends: 137 [2022-11-21 16:52:46,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-11-21 16:52:46,453 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 23 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:46,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 112 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-21 16:52:46,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-21 16:52:46,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-11-21 16:52:46,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 87 states have internal predecessors, (89), 29 states have call successors, (29), 23 states have call predecessors, (29), 22 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-21 16:52:46,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 145 transitions. [2022-11-21 16:52:46,488 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 145 transitions. Word has length 95 [2022-11-21 16:52:46,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:46,489 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 145 transitions. [2022-11-21 16:52:46,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 7 states have call predecessors, (27), 7 states have call successors, (27) [2022-11-21 16:52:46,490 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 145 transitions. [2022-11-21 16:52:46,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-21 16:52:46,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:46,494 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:52:46,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 16:52:46,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:46,694 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:52:46,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:46,695 INFO L85 PathProgramCache]: Analyzing trace with hash 75049244, now seen corresponding path program 2 times [2022-11-21 16:52:46,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:46,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349637539] [2022-11-21 16:52:46,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:46,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:46,705 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:52:46,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288455382] [2022-11-21 16:52:46,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:52:46,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:46,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:52:46,707 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:52:46,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 16:52:46,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:52:46,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:52:46,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-21 16:52:46,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:52:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 78 proven. 28 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-11-21 16:52:47,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:52:48,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:48,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349637539] [2022-11-21 16:52:48,102 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:52:48,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288455382] [2022-11-21 16:52:48,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288455382] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:52:48,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:52:48,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-11-21 16:52:48,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492506579] [2022-11-21 16:52:48,104 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-21 16:52:48,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:52:48,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:48,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:52:48,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-11-21 16:52:48,106 INFO L87 Difference]: Start difference. First operand 137 states and 145 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-11-21 16:52:48,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:48,647 INFO L93 Difference]: Finished difference Result 139 states and 146 transitions. [2022-11-21 16:52:48,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:52:48,647 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 100 [2022-11-21 16:52:48,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:48,648 INFO L225 Difference]: With dead ends: 139 [2022-11-21 16:52:48,649 INFO L226 Difference]: Without dead ends: 128 [2022-11-21 16:52:48,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-21 16:52:48,650 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 13 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:48,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 106 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 16:52:48,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-21 16:52:48,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-11-21 16:52:48,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 80 states have (on average 1.0375) internal successors, (83), 82 states have internal predecessors, (83), 26 states have call successors, (26), 21 states have call predecessors, (26), 21 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-21 16:52:48,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 134 transitions. [2022-11-21 16:52:48,694 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 134 transitions. Word has length 100 [2022-11-21 16:52:48,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:48,695 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 134 transitions. [2022-11-21 16:52:48,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-11-21 16:52:48,695 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 134 transitions. [2022-11-21 16:52:48,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-21 16:52:48,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:48,697 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:52:48,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 16:52:48,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-21 16:52:48,903 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:52:48,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:48,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1602424598, now seen corresponding path program 2 times [2022-11-21 16:52:48,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:48,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631636284] [2022-11-21 16:52:48,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:48,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:48,913 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:52:48,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418835308] [2022-11-21 16:52:48,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:52:48,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:48,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:52:48,915 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:52:48,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 16:52:49,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:52:49,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:52:49,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 16:52:49,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:52:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 120 proven. 656 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-11-21 16:52:49,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:52:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-11-21 16:52:49,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:49,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631636284] [2022-11-21 16:52:49,377 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:52:49,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418835308] [2022-11-21 16:52:49,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418835308] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:52:49,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:52:49,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-21 16:52:49,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749029596] [2022-11-21 16:52:49,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:52:49,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 16:52:49,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:49,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 16:52:49,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:52:49,380 INFO L87 Difference]: Start difference. First operand 128 states and 134 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) [2022-11-21 16:52:49,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:49,925 INFO L93 Difference]: Finished difference Result 394 states and 419 transitions. [2022-11-21 16:52:49,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-21 16:52:49,926 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), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) Word has length 125 [2022-11-21 16:52:49,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:49,928 INFO L225 Difference]: With dead ends: 394 [2022-11-21 16:52:49,928 INFO L226 Difference]: Without dead ends: 380 [2022-11-21 16:52:49,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-11-21 16:52:49,930 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 182 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:49,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 360 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:52:49,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-11-21 16:52:50,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 313. [2022-11-21 16:52:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 194 states have (on average 1.0515463917525774) internal successors, (204), 202 states have internal predecessors, (204), 65 states have call successors, (65), 53 states have call predecessors, (65), 53 states have return successors, (63), 57 states have call predecessors, (63), 63 states have call successors, (63) [2022-11-21 16:52:50,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 332 transitions. [2022-11-21 16:52:50,007 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 332 transitions. Word has length 125 [2022-11-21 16:52:50,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:50,007 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 332 transitions. [2022-11-21 16:52:50,008 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), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) [2022-11-21 16:52:50,008 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 332 transitions. [2022-11-21 16:52:50,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-21 16:52:50,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:50,010 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:52:50,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-21 16:52:50,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-21 16:52:50,216 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:52:50,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:50,216 INFO L85 PathProgramCache]: Analyzing trace with hash 709017654, now seen corresponding path program 3 times [2022-11-21 16:52:50,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:50,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027767014] [2022-11-21 16:52:50,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:50,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:50,235 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:52:50,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760151444] [2022-11-21 16:52:50,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:52:50,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:50,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:52:50,237 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:52:50,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 16:52:50,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-21 16:52:50,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:52:50,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-21 16:52:50,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:52:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 88 proven. 67 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2022-11-21 16:52:50,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:52:51,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:51,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027767014] [2022-11-21 16:52:51,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:52:51,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760151444] [2022-11-21 16:52:51,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760151444] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:52:51,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:52:51,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-11-21 16:52:51,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504013187] [2022-11-21 16:52:51,551 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-21 16:52:51,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:52:51,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:51,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:52:51,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-11-21 16:52:51,553 INFO L87 Difference]: Start difference. First operand 313 states and 332 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-21 16:52:52,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:52,169 INFO L93 Difference]: Finished difference Result 326 states and 345 transitions. [2022-11-21 16:52:52,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 16:52:52,169 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 128 [2022-11-21 16:52:52,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:52,171 INFO L225 Difference]: With dead ends: 326 [2022-11-21 16:52:52,172 INFO L226 Difference]: Without dead ends: 324 [2022-11-21 16:52:52,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-11-21 16:52:52,173 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 13 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:52,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 126 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 16:52:52,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-11-21 16:52:52,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 323. [2022-11-21 16:52:52,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 200 states have (on average 1.05) internal successors, (210), 208 states have internal predecessors, (210), 67 states have call successors, (67), 55 states have call predecessors, (67), 55 states have return successors, (65), 59 states have call predecessors, (65), 65 states have call successors, (65) [2022-11-21 16:52:52,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 342 transitions. [2022-11-21 16:52:52,237 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 342 transitions. Word has length 128 [2022-11-21 16:52:52,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:52,238 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 342 transitions. [2022-11-21 16:52:52,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-21 16:52:52,238 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 342 transitions. [2022-11-21 16:52:52,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-21 16:52:52,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:52,240 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:52:52,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-21 16:52:52,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-21 16:52:52,441 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:52:52,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:52,441 INFO L85 PathProgramCache]: Analyzing trace with hash 36255119, now seen corresponding path program 1 times [2022-11-21 16:52:52,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:52,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494927133] [2022-11-21 16:52:52,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:52,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:52,451 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:52:52,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432102340] [2022-11-21 16:52:52,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:52,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:52,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:52:52,453 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:52:52,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-21 16:52:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:52,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-21 16:52:52,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:52:53,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 104 proven. 116 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-11-21 16:52:53,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:52:59,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:59,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494927133] [2022-11-21 16:52:59,882 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:52:59,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432102340] [2022-11-21 16:52:59,882 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-11-21 16:52:59,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-21 16:53:00,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-21 16:53:00,088 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: Div with more than two parameters at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:569) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:509) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:421) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.findBestReplacementSbr(DualJunctionDer.java:310) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:326) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:233) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:200) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:184) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:129) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-21 16:53:00,093 INFO L158 Benchmark]: Toolchain (without parser) took 42327.10ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 130.5MB in the beginning and 101.7MB in the end (delta: 28.7MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. [2022-11-21 16:53:00,094 INFO L158 Benchmark]: CDTParser took 15.01ms. Allocated memory is still 113.2MB. Free memory was 55.3MB in the beginning and 80.0MB in the end (delta: -24.7MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. [2022-11-21 16:53:00,094 INFO L158 Benchmark]: CACSL2BoogieTranslator took 286.52ms. Allocated memory is still 159.4MB. Free memory was 130.5MB in the beginning and 120.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-21 16:53:00,094 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.21ms. Allocated memory is still 159.4MB. Free memory was 120.0MB in the beginning and 117.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 16:53:00,095 INFO L158 Benchmark]: Boogie Preprocessor took 21.17ms. Allocated memory is still 159.4MB. Free memory was 117.9MB in the beginning and 117.1MB in the end (delta: 771.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 16:53:00,095 INFO L158 Benchmark]: RCFGBuilder took 337.44ms. Allocated memory is still 159.4MB. Free memory was 117.1MB in the beginning and 105.3MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-21 16:53:00,095 INFO L158 Benchmark]: TraceAbstraction took 41640.81ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 104.5MB in the beginning and 101.7MB in the end (delta: 2.8MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. [2022-11-21 16:53:00,097 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 15.01ms. Allocated memory is still 113.2MB. Free memory was 55.3MB in the beginning and 80.0MB in the end (delta: -24.7MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 286.52ms. Allocated memory is still 159.4MB. Free memory was 130.5MB in the beginning and 120.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.21ms. Allocated memory is still 159.4MB. Free memory was 120.0MB in the beginning and 117.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.17ms. Allocated memory is still 159.4MB. Free memory was 117.9MB in the beginning and 117.1MB in the end (delta: 771.7kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 337.44ms. Allocated memory is still 159.4MB. Free memory was 117.1MB in the beginning and 105.3MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 41640.81ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 104.5MB in the beginning and 101.7MB in the end (delta: 2.8MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: Div with more than two parameters de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: Div with more than two parameters: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:569) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-21 16:53:00,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a --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 c55d57654781cf0634666e1c7d4e43dff0d9410f4306aded3e4e446e1f9e88d1 --- 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-b5237d8 [2022-11-21 16:53:02,461 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:53:02,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:53:02,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:53:02,511 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:53:02,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:53:02,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:53:02,524 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:53:02,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:53:02,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:53:02,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:53:02,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:53:02,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:53:02,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:53:02,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:53:02,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:53:02,551 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:53:02,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:53:02,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:53:02,563 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:53:02,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:53:02,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:53:02,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:53:02,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:53:02,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:53:02,581 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:53:02,582 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:53:02,583 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:53:02,585 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:53:02,586 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:53:02,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:53:02,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:53:02,589 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:53:02,590 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:53:02,592 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:53:02,592 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:53:02,593 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:53:02,593 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:53:02,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:53:02,594 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:53:02,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:53:02,600 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-11-21 16:53:02,643 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:53:02,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:53:02,645 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:53:02,645 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:53:02,646 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:53:02,647 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:53:02,647 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:53:02,648 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:53:02,648 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:53:02,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:53:02,649 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:53:02,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:53:02,650 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:53:02,650 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:53:02,650 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:53:02,650 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:53:02,651 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 16:53:02,651 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-21 16:53:02,651 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-21 16:53:02,651 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:53:02,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:53:02,652 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:53:02,652 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:53:02,652 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:53:02,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:53:02,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:53:02,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:53:02,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:53:02,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:53:02,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:53:02,654 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-21 16:53:02,654 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-21 16:53:02,655 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:53:02,655 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:53:02,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:53:02,655 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-21 16:53:02,656 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c55d57654781cf0634666e1c7d4e43dff0d9410f4306aded3e4e446e1f9e88d1 [2022-11-21 16:53:03,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:53:03,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:53:03,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:53:03,083 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:53:03,084 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:53:03,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c [2022-11-21 16:53:06,123 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:53:06,438 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:53:06,439 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c [2022-11-21 16:53:06,449 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/data/eb07eb8c6/57d861e9c95640d8aff0570f741ffb9d/FLAGad244080a [2022-11-21 16:53:06,475 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/data/eb07eb8c6/57d861e9c95640d8aff0570f741ffb9d [2022-11-21 16:53:06,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:53:06,482 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:53:06,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:53:06,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:53:06,492 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:53:06,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:53:06" (1/1) ... [2022-11-21 16:53:06,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a848ffb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:06, skipping insertion in model container [2022-11-21 16:53:06,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:53:06" (1/1) ... [2022-11-21 16:53:06,503 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:53:06,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:53:06,721 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_0ed8fe95-8d91-450c-b28a-474703b27e6d/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c[588,601] [2022-11-21 16:53:06,747 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:53:06,759 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:53:06,772 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_0ed8fe95-8d91-450c-b28a-474703b27e6d/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c[588,601] [2022-11-21 16:53:06,788 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:53:06,818 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:53:06,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:06 WrapperNode [2022-11-21 16:53:06,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:53:06,820 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:53:06,821 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:53:06,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:53:06,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:06" (1/1) ... [2022-11-21 16:53:06,846 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:06" (1/1) ... [2022-11-21 16:53:06,873 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2022-11-21 16:53:06,874 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:53:06,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:53:06,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:53:06,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:53:06,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:06" (1/1) ... [2022-11-21 16:53:06,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:06" (1/1) ... [2022-11-21 16:53:06,895 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:06" (1/1) ... [2022-11-21 16:53:06,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:06" (1/1) ... [2022-11-21 16:53:06,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:06" (1/1) ... [2022-11-21 16:53:06,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:06" (1/1) ... [2022-11-21 16:53:06,923 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:06" (1/1) ... [2022-11-21 16:53:06,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:06" (1/1) ... [2022-11-21 16:53:06,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:53:06,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:53:06,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:53:06,934 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:53:06,935 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:06" (1/1) ... [2022-11-21 16:53:06,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:53:06,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:53:06,992 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:53:07,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:53:07,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:53:07,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-21 16:53:07,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:53:07,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:53:07,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-21 16:53:07,066 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-21 16:53:07,144 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:53:07,146 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:53:07,334 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:53:07,340 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:53:07,340 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-21 16:53:07,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:53:07 BoogieIcfgContainer [2022-11-21 16:53:07,342 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:53:07,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:53:07,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:53:07,348 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:53:07,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:53:06" (1/3) ... [2022-11-21 16:53:07,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@621ccc90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:53:07, skipping insertion in model container [2022-11-21 16:53:07,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:06" (2/3) ... [2022-11-21 16:53:07,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@621ccc90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:53:07, skipping insertion in model container [2022-11-21 16:53:07,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:53:07" (3/3) ... [2022-11-21 16:53:07,351 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound100.c [2022-11-21 16:53:07,370 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:53:07,370 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:53:07,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:53:07,437 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;@38fd97e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:53:07,451 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 16:53:07,455 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-21 16:53:07,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-21 16:53:07,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:53:07,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:53:07,462 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:53:07,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:53:07,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1823967074, now seen corresponding path program 1 times [2022-11-21 16:53:07,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:53:07,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123953709] [2022-11-21 16:53:07,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:53:07,482 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:53:07,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:53:07,491 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:53:07,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-21 16:53:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:53:07,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-21 16:53:07,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:53:07,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:53:07,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:53:07,624 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:53:07,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123953709] [2022-11-21 16:53:07,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123953709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:53:07,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:53:07,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:53:07,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364440918] [2022-11-21 16:53:07,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:53:07,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:53:07,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:53:07,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:53:07,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:53:07,677 INFO L87 Difference]: Start difference. First operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:07,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:53:07,714 INFO L93 Difference]: Finished difference Result 50 states and 87 transitions. [2022-11-21 16:53:07,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:53:07,717 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-21 16:53:07,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:53:07,726 INFO L225 Difference]: With dead ends: 50 [2022-11-21 16:53:07,726 INFO L226 Difference]: Without dead ends: 22 [2022-11-21 16:53:07,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:53:07,736 INFO L413 NwaCegarLoop]: 37 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, 37 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 [2022-11-21 16:53:07,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:53:07,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-21 16:53:07,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-21 16:53:07,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-21 16:53:07,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2022-11-21 16:53:07,788 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 7 [2022-11-21 16:53:07,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:53:07,789 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2022-11-21 16:53:07,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:07,790 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2022-11-21 16:53:07,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-21 16:53:07,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:53:07,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:53:07,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:53:08,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:53:08,004 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:53:08,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:53:08,005 INFO L85 PathProgramCache]: Analyzing trace with hash 178926099, now seen corresponding path program 1 times [2022-11-21 16:53:08,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:53:08,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3864709] [2022-11-21 16:53:08,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:53:08,006 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:53:08,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:53:08,010 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:53:08,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-21 16:53:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:53:08,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 16:53:08,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:53:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:53:08,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:53:08,144 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:53:08,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3864709] [2022-11-21 16:53:08,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3864709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:53:08,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:53:08,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:53:08,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688011797] [2022-11-21 16:53:08,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:53:08,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:53:08,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:53:08,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:53:08,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:53:08,149 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:08,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:53:08,175 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions. [2022-11-21 16:53:08,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:53:08,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-21 16:53:08,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:53:08,177 INFO L225 Difference]: With dead ends: 36 [2022-11-21 16:53:08,177 INFO L226 Difference]: Without dead ends: 24 [2022-11-21 16:53:08,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:53:08,179 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:53:08,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:53:08,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-21 16:53:08,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-21 16:53:08,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-21 16:53:08,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 35 transitions. [2022-11-21 16:53:08,192 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 35 transitions. Word has length 8 [2022-11-21 16:53:08,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:53:08,192 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 35 transitions. [2022-11-21 16:53:08,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:08,194 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 35 transitions. [2022-11-21 16:53:08,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-21 16:53:08,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:53:08,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:53:08,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:53:08,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:53:08,406 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:53:08,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:53:08,407 INFO L85 PathProgramCache]: Analyzing trace with hash 180475231, now seen corresponding path program 1 times [2022-11-21 16:53:08,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:53:08,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085844825] [2022-11-21 16:53:08,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:53:08,408 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:53:08,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:53:08,410 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:53:08,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-21 16:53:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:53:08,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:53:08,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:53:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:53:08,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:53:08,541 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:53:08,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085844825] [2022-11-21 16:53:08,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085844825] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:53:08,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:53:08,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:53:08,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380600384] [2022-11-21 16:53:08,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:53:08,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:53:08,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:53:08,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:53:08,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:53:08,544 INFO L87 Difference]: Start difference. First operand 24 states and 35 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:16,664 WARN L230 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-11-21 16:53:16,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2022-11-21 16:53:16,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:53:16,667 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:53:16,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 50 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 16:53:16,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:53:16,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:53:16,878 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:314) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPrecondition(IncrementalHoareTripleChecker.java:349) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:272) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:284) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.releaseLock(ChainingHoareTripleChecker.java:449) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.releaseLock(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:365) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 36 more [2022-11-21 16:53:16,882 INFO L158 Benchmark]: Toolchain (without parser) took 10399.00ms. Allocated memory is still 73.4MB. Free memory was 51.9MB in the beginning and 45.3MB in the end (delta: 6.6MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. [2022-11-21 16:53:16,882 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 56.6MB. Free memory is still 34.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 16:53:16,882 INFO L158 Benchmark]: CACSL2BoogieTranslator took 332.35ms. Allocated memory is still 73.4MB. Free memory was 51.7MB in the beginning and 40.1MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-21 16:53:16,883 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.48ms. Allocated memory is still 73.4MB. Free memory was 40.1MB in the beginning and 38.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 16:53:16,883 INFO L158 Benchmark]: Boogie Preprocessor took 56.35ms. Allocated memory is still 73.4MB. Free memory was 38.4MB in the beginning and 37.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 16:53:16,884 INFO L158 Benchmark]: RCFGBuilder took 410.72ms. Allocated memory is still 73.4MB. Free memory was 37.1MB in the beginning and 41.7MB in the end (delta: -4.6MB). Peak memory consumption was 2.9MB. Max. memory is 16.1GB. [2022-11-21 16:53:16,884 INFO L158 Benchmark]: TraceAbstraction took 9536.25ms. Allocated memory is still 73.4MB. Free memory was 40.8MB in the beginning and 45.3MB in the end (delta: -4.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 16:53:16,886 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 56.6MB. Free memory is still 34.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 332.35ms. Allocated memory is still 73.4MB. Free memory was 51.7MB in the beginning and 40.1MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.48ms. Allocated memory is still 73.4MB. Free memory was 40.1MB in the beginning and 38.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 56.35ms. Allocated memory is still 73.4MB. Free memory was 38.4MB in the beginning and 37.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 410.72ms. Allocated memory is still 73.4MB. Free memory was 37.1MB in the beginning and 41.7MB in the end (delta: -4.6MB). Peak memory consumption was 2.9MB. Max. memory is 16.1GB. * TraceAbstraction took 9536.25ms. Allocated memory is still 73.4MB. Free memory was 40.8MB in the beginning and 45.3MB in the end (delta: -4.5MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:314) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed8fe95-8d91-450c-b28a-474703b27e6d/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken